CN110390911B - Display screen backlight brightness control method of electronic equipment and electronic equipment - Google Patents

Display screen backlight brightness control method of electronic equipment and electronic equipment Download PDF

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Publication number
CN110390911B
CN110390911B CN201810356442.8A CN201810356442A CN110390911B CN 110390911 B CN110390911 B CN 110390911B CN 201810356442 A CN201810356442 A CN 201810356442A CN 110390911 B CN110390911 B CN 110390911B
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display screen
backlight brightness
display
screen
input
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CN110390911A (en
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王剑平
杨定洲
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ZTE Corp
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ZTE Corp
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Priority to PCT/CN2019/076938 priority patent/WO2019201021A1/en
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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
    • 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
    • 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
    • G09G3/36—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 using liquid crystals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/14—Display of multiple viewports

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

The embodiment of the invention provides a display screen brightness control method of electronic equipment, wherein the electronic equipment comprises N display screens; the method comprises the following steps: determining the display content of each display screen; determining the backlight brightness of each display screen according to the display content of each display screen; when at least two display screens with different backlight brightness exist in the N display screens, the backlight brightness of at least one display screen in the N display screens is adjusted, so that the backlight brightness of the N display screens is the same. The embodiment of the invention also discloses electronic equipment and a computer readable storage medium.

Description

Display screen backlight brightness control method of electronic equipment and electronic equipment
Technical Field
The present invention relates to a multi-screen display technology, and in particular, to a method for controlling backlight brightness of a display screen of an electronic device, and a computer-readable storage medium.
Background
At present, with the wide application of smart phones, the mobile phone display technology gradually becomes a research hotspot; in the current field of mobile phone display, not only a single-display mobile phone but also a dual-screen mobile phone or even a multi-screen mobile phone exists; for a mobile phone with two or more display screens, the screen brightness of each display screen is usually inconsistent, for example, when each display screen displays different contents, each display screen usually adopts different screen brightness determination methods, which may cause different backlight brightness of each display screen; however, the end user's requirements for backlight brightness of each display are generally the same, and thus, the above-described display backlight brightness control scheme cannot meet the user's requirements.
Disclosure of Invention
In order to solve the existing technical problem, embodiments of the present invention provide a display screen backlight brightness control method for an electronic device, and a computer-readable storage medium, which can automatically adjust the backlight brightness of each display screen to the same value, and meet the requirements of a terminal user.
In order to achieve the above purpose, the technical solution of the embodiment of the present invention is realized as follows:
the embodiment of the invention discloses a display screen backlight brightness control method of electronic equipment, wherein the electronic equipment comprises N display screens, and N is a natural number greater than 1; the method comprises the following steps:
determining the display content of each display screen;
determining the backlight brightness of each display screen according to the display content of each display screen;
and when at least two display screens with different backlight brightness exist in the N display screens, adjusting the backlight brightness of at least one display screen in the N display screens to ensure that the backlight brightness of the N display screens is the same.
In the above scheme, the determining the backlight brightness of each display screen according to the display content of each display screen includes:
acquiring an input backlight brightness value of each display screen, wherein the input backlight brightness value of each display screen comprises a backlight brightness value input to each display screen of the electronic equipment or a backlight brightness value of each display screen determined according to the ambient light intensity of the electronic equipment;
and correcting the input backlight brightness value of each display screen according to the display content of each display screen to obtain the backlight brightness of each display screen.
In the above scheme, the input backlight brightness values of the N display screens are the same.
In the foregoing solution, the adjusting the backlight brightness of at least one of the N display screens includes:
adjusting the input backlight brightness value of the at least one display screen to obtain the adjusted input backlight brightness value of the at least one display screen;
and correcting the adjusted input backlight brightness value of the at least one display screen according to the display content of the at least one display screen to obtain the adjusted backlight brightness of the at least one display screen.
In the above scheme, after determining the display content of each display screen, the method further includes:
determining the type of display content of each display screen;
when the types of the display contents of at least two of the N display screens are different, the backlight Brightness is controlled in different image Adaptive Brightness Control (CABC) modes for the display screens displaying the different types of display contents.
In the above scheme, the method further comprises:
acquiring the residual electric quantity of the electronic equipment;
and when the residual capacity of the electronic equipment is lower than the capacity threshold value, determining the CABC mode of each display screen of the electronic equipment as the MOVIE mode.
The embodiment of the invention also discloses electronic equipment, which comprises a memory, a processor and N display screens, wherein N is a natural number more than 1; wherein the content of the first and second substances,
the memory is used for storing a computer program;
the processor is configured to execute the computer program stored in the memory to implement the steps of:
determining the display content of each display screen;
determining the backlight brightness of each display screen according to the display content of each display screen;
and when at least two display screens with different backlight brightness exist in the N display screens, adjusting the backlight brightness of at least one display screen in the N display screens to ensure that the backlight brightness of the N display screens is the same.
In the foregoing solution, the processor is specifically configured to execute the computer program stored in the memory, so as to implement the following steps:
acquiring an input backlight brightness value of each display screen, wherein the input backlight brightness value of each display screen comprises a backlight brightness value input to each display screen of the electronic equipment or a backlight brightness value of each display screen determined according to the ambient light intensity of the electronic equipment;
and correcting the input backlight brightness value of each display screen according to the display content of each display screen to obtain the backlight brightness of each display screen.
In the foregoing solution, the processor is specifically configured to execute the computer program stored in the memory, so as to implement the following steps:
adjusting the input backlight brightness value of the at least one display screen to obtain the adjusted input backlight brightness value of the at least one display screen;
and correcting the adjusted input backlight brightness value of the at least one display screen according to the display content of the at least one display screen to obtain the adjusted backlight brightness of the at least one display screen.
The embodiment of the invention also discloses a computer readable storage medium, wherein a computer program is stored on the computer readable storage medium, and when the computer program is executed by a processor, the steps of the display screen backlight brightness control method of any electronic equipment are realized.
In the display screen backlight brightness control method of the electronic equipment, the electronic equipment and the computer readable storage medium provided by the embodiment of the invention, the display content of each display screen is determined; determining the backlight brightness of each display screen according to the display content of each display screen; when at least two display screens with different backlight brightness exist in each display screen, the backlight brightness of at least one display screen in each display screen is adjusted, so that the backlight brightness of each display screen is the same.
Therefore, when the technical scheme is adopted, the backlight brightness of each display screen can be automatically adjusted to the same value, and the requirement of a user on the backlight brightness consistency of the display screens is met.
Drawings
Fig. 1 is a schematic diagram of a hardware structure of an electronic device according to an embodiment of the present invention;
FIG. 2 is a first flowchart illustrating a method for controlling backlight brightness of a display panel of an electronic device according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a display screen backlight brightness control of a dual-screen electronic device according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating a method for controlling backlight brightness of a display panel of an electronic device according to an embodiment of the present invention;
fig. 5 is a schematic diagram of another hardware structure of the electronic device according to the embodiment of the present invention.
Detailed Description
The present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the invention can be applied to electronic equipment with a plurality of display screens, wherein the electronic equipment can be a computer and other fixed terminals, and can also be mobile terminals such as mobile phones, tablet computers, notebook computers and the like; the Display screen may be a Display screen using a light source provided by a backlight, and may be, for example, a Liquid Crystal Display (LCD), an led (light Emitting diode) Display screen, or the like.
Here, the display described above may Control the backlight Brightness by a Content Adaptive Brightness Control (CABC) method, and the CABC mode corresponding to the display may be an OFF mode, a UI mode, a STILL mode, or a MOVING mode.
Fig. 1 is a schematic diagram of a hardware structure of an electronic device according to an embodiment of the present invention, as shown in fig. 1, the electronic device may include a 1 st display 101 to an nth display 102, and the electronic device may further include a Central Processing Unit (CPU) 103, a first memory 104, a sensor 105, and other peripherals 106.
In practical applications, the first Memory 104 may be a volatile Memory (volatile Memory), such as a Random-Access Memory (RAM); or a non-volatile Memory (non-volatile Memory), such as a Read-Only Memory (ROM), a flash Memory (flash Memory), a Hard Disk (Hard Disk Drive, HDD) or a Solid-State Drive (SSD); or a combination of the above types of memories and provides instructions and data to the CPU.
Here, the type of the sensor 105 is not limited, and the sensor 105 may be, for example, a temperature sensor, a distance sensor, an acceleration sensor, or the like, and the other peripheral may be a keyboard, a usb disk, or the like.
In actual implementation, the CPU can read data in the memory or write data into the memory; the CPU may also control the operating state of the display screen, sensors or other peripherals.
Based on the above-described electronic device, the following embodiments are proposed.
First embodiment
A first embodiment of the present invention describes a method for controlling backlight brightness of a display screen of an electronic device, where the electronic device may include N display screens connected to each other by a connection component, where N is a natural number greater than 1;
obviously, when N is equal to 2, the electronic device may be a dual-screen electronic device, and when N is greater than 2, the electronic device is an electronic device having more than two display screens; that is to say, the embodiment of the invention is not only suitable for the electronic equipment with double screens, but also suitable for the electronic equipment with more than two display screens.
Fig. 2 is a first flowchart of a method for controlling backlight brightness of a display screen of an electronic device according to an embodiment of the present invention, as shown in fig. 2, the process may include:
step 201: determining the display content of each display screen;
in practical application, when the processor controls each display screen to work, the display content data of each display screen can be read, and then the display content of each display screen is determined; in one example, in an electronic device employing a CABC function, a content analyzer circuit is provided, which can read and analyze the display content of each display screen, and the content analyzer circuit can be implemented in a chip or stored in a processor in the form of a program.
Step 202: determining the backlight brightness of each display screen according to the display content of each display screen;
optionally, an implementation manner of this step may be:
acquiring an input backlight brightness value of each display screen, wherein the input backlight brightness value of each display screen comprises a backlight brightness value input to each display screen of the electronic equipment or a backlight brightness value of each display screen determined according to the ambient light intensity of the electronic equipment;
and correcting the input backlight brightness value of each display screen according to the display content of each display screen to obtain the backlight brightness of each display screen.
Here, the input backlight brightness values of the display screen may be the same or different; in one example, the input backlight brightness values of the display screens are parameters directly input by the terminal user, and at this time, the input backlight brightness values of the display screens may be the same or different; in another example, the input backlight brightness value of each display screen is determined by the ambient light intensity of the electronic device, and if the input backlight brightness value of each display screen is determined by the same algorithm, the input backlight brightness value of each display screen is the same.
In practical application, the ambient light intensity of the electronic device can be acquired by the ambient light sensor.
Optionally, another implementation manner of this step may be:
and determining the backlight brightness of each display screen by adopting a CABC mode according to the display content of each display screen. CABC is a dynamic screen backlight brightness control mode, and the technology can adjust the relation between the gray-scale value of an image and the screen backlight brightness according to the image content displayed on the screen, so that the display effect of the image is basically maintained while the screen backlight brightness is effectively reduced.
In practical application, the mode of the CABC corresponding to each display screen can be determined according to the type of the display content of each display screen; here, the type of the display content may be a UI picture, a still image, a moving image, or the like.
It can be understood that the modes of the CABC corresponding to the respective display screens may be the same or different; in one example, for a dual-screen electronic device, when both display screens display pictures, the modes of the CABC corresponding to both display screens are the stil mode; in another example, for a dual-screen electronic device, one display screen displays a STILL picture and the other display screen displays a video, the mode of the CABC corresponding to the one display screen is a STILL mode, and the mode of the CABC corresponding to the other display screen is a MOVIE mode.
In practical implementation, determining the backlight brightness of each display screen by using a CABC method according to the display content of each display screen may include:
acquiring an input backlight brightness value of each display screen, wherein the input backlight brightness value of each display screen is the backlight brightness value of each display screen input to the electronic equipment or the backlight brightness value of each display screen determined according to the ambient light intensity of the electronic equipment;
and correcting the input backlight brightness value of each display screen by adopting a CABC mode according to the display content of each display screen to obtain the backlight brightness of each display screen.
Optionally, the input backlight brightness values of the N display screens are the same; it can be understood that if the input backlight brightness values of the N display screens are the same, but the display contents of the N display screens are different, the backlight brightness of the N display screens obtained according to the CABC method may be different; in this way, in order to make the backlight brightness of each display screen the same, the backlight brightness of at least one display screen obtained according to the CABC method needs to be adjusted.
In one example, this step may be implemented using a processor or the like; in another example, the electronic device may include a driving chip of each display screen and a backlight chip of each display screen, wherein,
the driving chip of each display screen can acquire the display content of each display screen and the input backlight brightness value of each display screen, and determine the backlight brightness of each display screen in a CABC mode; the driving chip of each display screen can also send the backlight brightness of the corresponding display screen to the corresponding backlight chip; in practical implementation, the driving chip of each display panel may send the backlight brightness to the backlight chip through a Pulse Width Modulation (PWM) signal, where the sent backlight brightness may be represented by a PWM signal duty ratio; in one example, the driving chip of each display screen may directly transmit the PWM waveform to the PWM adjusting pin of the backlight chip, so as to adjust the backlight brightness of the corresponding display screen, thereby implementing power consumption control of the backlight source. Here, the backlight chip of each display panel may drive the corresponding backlight to emit light according to the received signal.
Step 203: and when at least two display screens with different backlight brightness exist in the N display screens, adjusting the backlight brightness of at least one display screen in the N display screens to ensure that the backlight brightness of the N display screens is the same.
Optionally, as for the manner of adjusting the backlight brightness of at least one display screen among the N display screens, in an example, the input backlight brightness value of the at least one display screen may be adjusted to obtain an adjusted input backlight brightness value of the at least one display screen; and correcting the adjusted input backlight brightness value of the at least one display screen according to the display content of the at least one display screen to obtain the adjusted backlight brightness of the at least one display screen.
That is, the adjustment of the backlight brightness of the display screen is realized by adjusting the input backlight brightness value of the display screen; it can be understood that, according to the above description, after the input backlight brightness value of the display screen is adjusted, the backlight brightness of the display screen changes, and at this time, the PWM signal generated by the backlight chip changes accordingly.
Here, the adjustment range of the input backlight brightness value of the display screen is determined according to the adjusted backlight brightness of the N display screens, that is, it is required to ensure that the backlight brightness of the N display screens is the same after the input backlight brightness value of the display screen is adjusted.
Further, if the backlight brightness of each display screen is determined in a CABC manner after the display content of each display screen is determined, the implementation manner of correcting the adjusted input backlight brightness value of the at least one display screen may be: and correcting the adjusted input backlight brightness value of the at least one display screen by adopting CABC.
For the implementation of adjusting the input backlight brightness value of the display screen, for example, according to the display content, the input backlight brightness value is corrected in a CABC manner by: determining a correction proportion value according to the display content, wherein the correction proportion value is between 0 and 1; then, the input backlight brightness value is multiplied by the correction proportion value to obtain the backlight brightness of the display screen; when the backlight brightness of the display screen needs to be adjusted to the backlight brightness value of another display screen, because the display content of the display screen remains unchanged for a period of time, the correction proportion value corresponding to the display screen remains unchanged, and the adjusted input backlight brightness value of the display screen can be calculated according to the correction proportion value corresponding to the display screen and the backlight brightness value of the display screen that needs to be obtained after adjustment (namely the backlight brightness value of the another display screen is in). For example, initially, the backlight brightness of the first display screen is a, and when the backlight brightness of the first display screen needs to be adjusted to the backlight brightness B of the second display screen, firstly, a correction ratio value R corresponding to the first display screen is obtained according to an input backlight brightness value C of the first display screen at the initial time and the backlight brightness a of the first display screen, where R is a/C; then there are: obviously, according to the adjusted input backlight luminance value B/R of the first display screen and the correction ratio value R corresponding to the first display screen, it can be obtained that the adjusted backlight luminance of the first display screen is B/R × R ═ B, that is, the adjusted backlight luminance of the first display screen is the same as the backlight luminance of the second display screen.
In a specific example, for a dual-screen electronic device, two display screens of the dual-screen electronic device may be respectively denoted as a first display screen and a second display screen; initially, the input backlight brightness values of the first display screen and the second display screen are the same and are both 160; the display contents of the first display screen and the second display screen are different, the backlight brightness of the first display screen obtained according to the CABC function is 140, and the backlight brightness of the second display screen obtained according to the CABC function is 150; because the backlight brightness of the two display screens obtained according to the CABC function is different, at the moment, the input backlight brightness value of the first display screen and/or the second display screen can be adjusted, so that the backlight brightness of the two display screens obtained according to the CABC function is the same.
Optionally, at least one of the N display screens described above is: the other display screens except the display screen with the lowest backlight brightness in the N display screens, that is, if at least two display screens with different backlight brightness exist in the N display screens, only the backlight brightness of the other display screens except the display screen with the lowest backlight brightness in the N display screens is reduced, so that the backlight brightness of the N display screens is equal to the backlight brightness of the display screen with the lowest backlight brightness before adjustment; it can be seen that, when the backlight brightness adjusting mode is adopted, the power consumption of the display screen can be effectively reduced because only the backlight brightness of the display screen is adjusted to be low.
It should be noted that, if the backlight brightness of the N display screens is the same, the process may be ended directly.
In one example, this step may be implemented using a processor or the like; in another example, this step can be implemented by using the above-mentioned driving chip of each display panel and the backlight chip of each display panel.
The display screen driving chip of the intelligent terminal in the current market supports CABC function, the current CABC function supports 4 modes, namely OFF mode, UI mode, STILL mode and MOVING mode, and different CABC values are set corresponding to the register respectively; wherein, the OFF mode represents that the CABC function is turned OFF, and the corresponding CABC value is 0; the UI mode is suitable for displaying a User Interface, power consumption when a User Interface (UI) picture is displayed is optimized, the picture quality is guaranteed as much as possible, meanwhile, 10% -15% of power consumption can be saved, and the corresponding CABC value is 1; the STILL mode is suitable for displaying a static image, the power consumption of the static image is optimized, the image quality loss in the STILL mode is within an acceptable range, meanwhile, the power consumption can be saved by 20% -30%, and the corresponding CABC value is 2; the MOVIE mode is suitable for displaying a dynamic image to optimize power consumption when the dynamic image is displayed, the power consumption can be reduced to the maximum extent in the mode, but partial loss of image quality can be brought, 30% + power consumption can be saved, and the corresponding CABC value is 3.
In practical implementation, for an electronic device with multiple display screens, the CABC modes of the multiple display screens may be set to the same CABC mode, for example, for an intelligent terminal device with dual display screens, the CABC values of the two display screens are both 2, that is, the CABC modes of the two display screens are both stil modes.
It can be seen that if each display screen displays different content, the backlight brightness of each display screen may be different, and the end user's requirement for the backlight brightness of each display screen is usually the same, so the above-mentioned display screen backlight brightness control scheme cannot meet the user's requirement.
In view of the above problems, in the embodiment of the present invention, after the backlight brightness of each display screen is determined by using the CABC method, if at least two display screens with different backlight brightness exist in the N display screens, the backlight brightness of at least one display screen in the N display screens may be adjusted, so that the backlight brightness of the N display screens is the same; therefore, the backlight brightness of each display screen can be automatically adjusted to the same value, and the requirement of a user on the backlight brightness consistency of the display screens is met.
Second embodiment
In order to further embody the object of the present invention, the first embodiment of the present invention is further illustrated.
In the second embodiment of the present invention, a dual-screen electronic device is taken as an example to describe an implementation manner of the display screen backlight brightness control method.
Fig. 3 is a schematic structural diagram of implementing display screen backlight brightness control of a dual-screen electronic device in an embodiment of the present invention, as shown in fig. 3, two display screens of the dual-screen electronic device are respectively marked as a main screen and a sub-screen, and the structure shown in fig. 3 may include a main screen driving chip 301, a sub-screen driving chip 302, a main screen backlight chip 303, a sub-screen backlight chip 304, a first LED backlight 305, and a second LED backlight 306; wherein the content of the first and second substances,
the main screen driving chip 301 and the auxiliary screen driving chip 302 respectively obtain respective input backlight brightness values; the main screen driving chip can obtain the display content of the main screen, and corrects the input backlight brightness value in a CABC mode to obtain the backlight brightness of the main screen, and the backlight brightness of the main screen is sent to the main screen backlight chip in a PWM signal duty ratio mode; the auxiliary screen driving chip can obtain the display content of the auxiliary screen, corrects the input backlight brightness value in a CABC mode to obtain the backlight brightness of the auxiliary screen, and sends the backlight brightness of the auxiliary screen to the auxiliary screen backlight chip in a PWM signal duty ratio mode;
the main screen backlight chip 303 may drive the first LED backlight to operate according to the received signal, where the first LED backlight may provide backlight for the main screen; likewise, the secondary screen backlight chip 304 may operate a second LED backlight based on the received signal, where the second LED backlight may provide backlight for the secondary screen.
Illustratively, the main screen driving chip can send data to the main screen backlight chip by means of a wireless digital control signal; the auxiliary screen driving chip can send data to the auxiliary screen backlight chip in a wireless digital control signal mode; in one specific example, the model of the main screen backlight chip may be TPS61165, and the sub-screen backlight chip may be packaged with a Power Management Integrated Circuit (PMIC).
Here, the input backlight brightness values of the main screen and the sub screen are the same, and it can be seen that when the display contents of the main screen and the sub screen are different, the backlight brightness of the main screen and the sub screen obtained according to the CABC method is different (the duty ratios of the PWM signals output by the main screen driving chip and the sub screen driving chip are different), and further user experience is affected.
Aiming at the problems, the duty ratios of PWM signals output by a main screen driving chip and an auxiliary screen driving chip can be respectively read, the PWM signals with high duty ratios can drive an LED backlight lamp to emit backlight with higher brightness after being processed by a corresponding backlight chip, and the PWM signals with low duty ratios can drive the LED backlight lamp to emit backlight with lower brightness after being processed by the corresponding backlight chip; therefore, the input backlight brightness value of one display screen can be adjusted, so that the backlight brightness of the main screen and the backlight brightness of the auxiliary screen are consistent; here, the adjustment manner of the input backlight brightness value of the display screen has already been described in the first embodiment of the present invention, and is not described here again.
Optionally, the input backlight brightness value of the display screen corresponding to the PWM signal with the high duty ratio may be adjusted to be low, so that the power consumption of the display screen of the electronic device may be reduced.
Fig. 4 is a second flowchart of a method for controlling backlight brightness of a display screen of an electronic device according to an embodiment of the present invention, and as shown in fig. 4, the process may include:
step 401: and acquiring a CABC value of each display screen and an input backlight brightness value.
Here, it is found that the CABC value of the main screen and the CABC value of the sub screen are both 2 according to the display contents of the two display screens, that is, the CABC modes of the main screen and the sub screen are both the stil mode.
The input backlight brightness values of the main screen and the auxiliary screen are the same and are Bx.
Step 402: and reading the duty ratio Xa of the PWM signal obtained by the main screen according to the CABC mode and the duty ratio Xb of the PWM signal obtained by the auxiliary screen according to the CABC mode.
Step 403: it is determined whether Xa is greater than or equal to Xb and if so step 404 is performed and if not step 405 is performed.
Step 404: the input backlight brightness value of the main screen is adjusted to (Xb/Xa) × Bx.
Step 405: the input backlight brightness value of the sub-screen is adjusted to (Xa/Xb) × Bx.
In a specific example, the input backlight brightness values of the main screen and the secondary screen are both 255, and initially, the backlight brightness of the main screen obtained according to the CABC method is 240 (actually expressed by a PWM signal duty ratio), and the backlight brightness of the secondary screen obtained according to the CABC method is 250.
According to the method for controlling the backlight brightness of the display screen of the electronic device in the embodiment, the input backlight brightness value of the secondary screen may be corrected to 240 × by (255/250), so that after the input backlight brightness value of the secondary screen is corrected, the backlight brightness of the secondary screen obtained according to the CABC method is the same as the backlight brightness of the primary screen obtained according to the CABC method, and is 240.
That is to say, in the embodiment of the present invention, on the basis of obtaining the backlight brightness of each display screen by using the CABC method, the input backlight brightness value of the display screen may be adjusted by using a feedback algorithm, so that the PWM signal duty ratios from the obtained values to each backlight chip are consistent, thereby eliminating the influence of inconsistent backlight brightness of each display screen caused by the CABC.
Third embodiment
In the third embodiment of the present invention, the display content of each display screen may be determined first; then, determining the type of the display content of each display screen; when the types of the display contents of at least two display screens in the N display screens are different, different CABC modes are adopted to control the backlight brightness aiming at the display screens displaying the display contents of different types.
Here, the display content type of the display screen may include a UI interface, a still image, a moving image, and the like.
The implementation of the third embodiment of the present invention is exemplarily described below by taking the above-described dual-screen electronic device as an example.
In one example, for different application scenarios, different CABC values may be adopted when the display content types of the main screen and the auxiliary screen of the dual-screen electronic device are different; when the dual-screen electronic equipment is in a child mode, video contents such as animation and the like can be displayed on the main screen so as to attract the sight of a shot child; meanwhile, displaying a shooting preview interface on the auxiliary screen; at this time, since the display content of the main screen is not directly viewed by the end user, the CABC mode of the main screen may be set to the MOVIE mode and the CABC mode of the sub screen may be set to the stil mode.
In another example, when the dual-screen electronic device is in a game mode, the virtual keys can be displayed on the main screen, and the game interface can be displayed on the auxiliary screen; aiming at the game interface displayed by the auxiliary screen, the virtual key displayed by the main screen can be adopted for operation, namely, the main screen can be used as a gamepad, when the main screen is used as the gamepad, the main screen is not needed to realize a high display effect, and at the moment, the CABC mode of the main screen can be set to be the MOVIE mode so as to reduce the power consumption of the main screen.
It can be seen that, in the multi-screen electronic device, different CABC modes can be set for different display contents, and the effect of reducing power consumption can be achieved in a scene without affecting user experience.
Optionally, different CABC modes may be set for different scenes (display pictures) in the single-screen mode, and the higher the value setting of the CABC is, the greater the power consumption reduction is, but some display effects are reduced, so that the setting of the CABC value needs to be performed in combination with the scenes; for example, for a display screen serving as a gamepad, the requirement for the display effect is not high, and the CABC value of the display screen where the gamepad is located can be set to 2, so that the purpose of reducing the power consumption of the display screen is achieved.
It should be noted that, when the types of the display contents of the N display screens are the same, the backlight brightness may be controlled in the same mode of the CABC for the N display screens.
The third embodiment of the present invention can be implemented by a processor, etc., or can be implemented based on the above-mentioned driving chip of each display panel and the backlight chip of each display panel.
Fourth embodiment
In the fourth embodiment of the present invention, the processor of the electronic device may first obtain the remaining power of the electronic device, and then, when determining that the remaining power of the electronic device is lower than the power threshold, the processor may set the CABC mode of each display screen of the electronic device to the MOVIE mode, so as to reduce the power consumption of the display screen.
Here, the charge threshold may be preset according to actual demand, for example, when the remaining charge is presented in percentage, the charge threshold may be between 10% and 30%, and optionally, the charge threshold is 20%.
Fifth embodiment
A fifth embodiment of the present invention provides an electronic device, aiming at a method for controlling brightness of a display screen of the electronic device according to the foregoing embodiments of the present invention.
Fig. 5 is another schematic diagram of a hardware structure of an electronic device according to an embodiment of the present invention, as shown in fig. 5, the electronic device may include a second memory 501, a processor 502, and N display screens 503, where N is a natural number greater than 1; wherein the content of the first and second substances,
the second memory 501 is used for storing computer programs;
the processor 502 is configured to execute the computer program stored in the memory to implement the steps of:
determining the display content of each display screen;
determining the backlight brightness of each display screen according to the display content of each display screen;
and when at least two display screens with different backlight brightness exist in the N display screens, adjusting the backlight brightness of at least one display screen in the N display screens to ensure that the backlight brightness of the N display screens is the same.
In practical applications, the second memory 501 may be a volatile memory, such as a RAM; or a non-volatile memory such as a ROM, a flash memory, a HDD, or a solid state disk SSD; or a combination of the above types of memories and provides instructions and data to the processor 502.
The Processor 502 may be at least one of an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a CPU, a controller, a microcontroller, and a microprocessor. It will be appreciated that the electronic devices used to implement the processor functions described above may be other devices, and embodiments of the present invention are not limited in particular.
Illustratively, the processor 502 is specifically configured to execute the computer program stored in the memory, implementing the steps of:
acquiring an input backlight brightness value of each display screen, wherein the input backlight brightness value of each display screen comprises a backlight brightness value input to each display screen of the electronic equipment or a backlight brightness value of each display screen determined according to the ambient light intensity of the electronic equipment;
and correcting the input backlight brightness value of each display screen according to the display content of each display screen to obtain the backlight brightness of each display screen.
Illustratively, the input backlight brightness values of the N display screens are the same.
Illustratively, the processor 502 is specifically configured to execute the computer program stored in the memory, implementing the steps of:
adjusting the input backlight brightness value of the at least one display screen to obtain the adjusted input backlight brightness value of the at least one display screen;
and correcting the adjusted input backlight brightness value of the at least one display screen according to the display content of the at least one display screen to obtain the adjusted backlight brightness of the at least one display screen.
Illustratively, the processor 502 is specifically configured to execute the computer program stored in the memory, implementing the steps of:
after the display content of each display screen is determined, determining the type of the display content of each display screen;
and when the types of the display contents of at least two display screens in the N display screens are different, different CABC modes are adopted to control the backlight brightness aiming at the display screens displaying different types of display contents.
Illustratively, the processor 502 is further configured to execute the computer program stored in the memory, implementing the steps of:
acquiring the residual electric quantity of the electronic equipment;
and when the residual capacity of the electronic equipment is lower than the capacity threshold value, determining the CABC mode of each display screen of the electronic equipment as the MOVIE mode.
Sixth embodiment
A sixth embodiment of the present invention provides a computer-readable storage medium, and in particular, computer program instructions corresponding to a display screen backlight brightness control method of an electronic device in this embodiment may be stored in a storage medium such as an optical disc, a hard disc, a usb disk, and the like, and when the computer program instructions corresponding to the display screen backlight brightness control method of an electronic device in the storage medium are read or executed by an electronic device, the steps of the display screen backlight brightness control method of any one of the electronic devices in the foregoing embodiments are implemented.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims (8)

1. The method for controlling the backlight brightness of the display screen of the electronic equipment is characterized in that the electronic equipment comprises N display screens, wherein N is a natural number greater than 1; the method comprises the following steps:
determining the display content of each display screen;
determining the backlight brightness of each display screen according to the display content of each display screen;
when at least two display screens with different backlight brightness exist in the N display screens, adjusting the backlight brightness of at least one display screen in the N display screens to enable the backlight brightness of the N display screens to be the same; the adjusting the backlight brightness of at least one of the N display screens includes:
adjusting the input backlight brightness value of the at least one display screen to obtain the adjusted input backlight brightness value of the at least one display screen;
and correcting the adjusted input backlight brightness value of the at least one display screen according to the display content of the at least one display screen to obtain the adjusted backlight brightness of the at least one display screen.
2. The method of claim 1, wherein determining the backlight brightness of each display screen according to the display content of each display screen comprises:
acquiring an input backlight brightness value of each display screen, wherein the input backlight brightness value of each display screen comprises a backlight brightness value input to each display screen of the electronic equipment or a backlight brightness value of each display screen determined according to the ambient light intensity of the electronic equipment;
and correcting the input backlight brightness value of each display screen according to the display content of each display screen to obtain the backlight brightness of each display screen.
3. The method of claim 2, wherein the input backlight brightness values for the N display screens are the same.
4. The method of claim 1, wherein after determining the display content of each display screen, the method further comprises:
determining the type of display content of each display screen;
and when the types of the display contents of at least two display screens in the N display screens are different, the backlight brightness is controlled by adopting different modes of image adaptive brightness control CABC aiming at the display screens displaying the display contents of different types.
5. The method of claim 1, further comprising:
acquiring the residual electric quantity of the electronic equipment;
and when the residual capacity of the electronic equipment is lower than the capacity threshold value, determining the CABC mode of each display screen of the electronic equipment as the MOVIE mode.
6. An electronic device, comprising a memory, a processor, and N display screens, wherein N is a natural number greater than 1; wherein the content of the first and second substances,
the memory is used for storing a computer program;
the processor is configured to execute the computer program stored in the memory to implement the steps of:
determining the display content of each display screen;
determining the backlight brightness of each display screen according to the display content of each display screen;
when at least two display screens with different backlight brightness exist in the N display screens, adjusting the backlight brightness of at least one display screen in the N display screens to enable the backlight brightness of the N display screens to be the same; the adjusting the backlight brightness of at least one of the N display screens includes:
adjusting the input backlight brightness value of the at least one display screen to obtain the adjusted input backlight brightness value of the at least one display screen;
and correcting the adjusted input backlight brightness value of the at least one display screen according to the display content of the at least one display screen to obtain the adjusted backlight brightness of the at least one display screen.
7. The electronic device of claim 6, wherein the processor is specifically configured to execute the computer program stored in the memory to implement the steps of:
acquiring an input backlight brightness value of each display screen, wherein the input backlight brightness value of each display screen comprises a backlight brightness value input to each display screen of the electronic equipment or a backlight brightness value of each display screen determined according to the ambient light intensity of the electronic equipment;
and correcting the input backlight brightness value of each display screen according to the display content of each display screen to obtain the backlight brightness of each display screen.
8. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 5.
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