CN111681614B - Backlight brightness value adjusting method and device, electronic equipment and storage medium - Google Patents
Backlight brightness value adjusting method and device, electronic equipment and storage medium Download PDFInfo
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- CN111681614B CN111681614B CN202010563567.5A CN202010563567A CN111681614B CN 111681614 B CN111681614 B CN 111681614B CN 202010563567 A CN202010563567 A CN 202010563567A CN 111681614 B CN111681614 B CN 111681614B
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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
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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
- G09G3/36—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
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0613—The adjustment depending on the type of the information to be displayed
- G09G2320/062—Adjustment of illumination source parameters
Abstract
The invention provides a method and a device for adjusting a backlight brightness value, electronic equipment and a storage medium, wherein the method comprises the following steps: acquiring a current screen brightness value of a screen to be adjusted; determining a backlight current value corresponding to the current screen brightness value according to a pre-configured two-section backlight curve; the two-section type backlight curve comprises a linear interval and a nonlinear interval; and adjusting the backlight brightness value of the screen to be adjusted based on the backlight current value. The invention can better relieve the problem of poor temperature rise index of the whole LCD and can effectively improve the endurance time of the LCD.
Description
Technical Field
The present invention relates to the field of backlight brightness technologies, and in particular, to a method and an apparatus for adjusting a backlight brightness value, an electronic device, and a storage medium.
Background
An LCD (Liquid Crystal Display) is a Display that needs to use an LED (Light-Emitting Diode) as a backlight source, and at present, a pure linear backlight luminance curve is usually adopted to determine the backlight luminance value of the LCD, and as the screen luminance percentage increases, the backlight luminance value also linearly increases, and since the LCD power consumption is proportional to the backlight luminance value, the temperature rise index of the LCD as a whole is poor, and the endurance time of the LCD is low.
Disclosure of Invention
In view of the above, the present invention provides a method and an apparatus for adjusting a backlight brightness value, an electronic device and a storage medium, which can better alleviate the problem of poor temperature rise index of an LCD, and can effectively improve the endurance time of the LCD.
In an embodiment, an embodiment of the present invention provides a method for adjusting a luminance value of a backlight, including: acquiring a current screen brightness value of a screen to be adjusted; determining a backlight current value corresponding to the current screen brightness value according to a pre-configured two-section type backlight curve; the two-section type backlight curve comprises a linear interval and a non-linear interval; and adjusting the backlight brightness value of the screen to be adjusted based on the backlight current value.
In one embodiment, the two-segment backlight curve is used for representing a first mapping relation between a screen brightness value and a screen brightness percentage; the step of determining the backlight current value corresponding to the current screen brightness value according to the pre-configured two-segment backlight curve includes: determining a target screen brightness percentage corresponding to the current screen brightness value according to a pre-configured two-section type backlight curve; calculating the backlight grade of the target screen brightness percentage in a preset backlight grade interval; and determining the backlight current value corresponding to the current screen brightness value based on the backlight grade of the target screen brightness percentage.
In one embodiment, the step of calculating the backlight level at which the target screen brightness percentage is within the preset backlight level interval includes: and calculating the product of the target screen brightness percentage and the upper limit value of the preset backlight grade interval to obtain the target backlight grade of the target screen brightness percentage.
In one embodiment, the step of determining the backlight current value corresponding to the current screen brightness value based on the target backlight level at which the target screen brightness percentage is located includes: determining a target duty ratio corresponding to the target backlight grade according to a preset corresponding relation between the backlight grade and the duty ratio; and determining the backlight current value corresponding to the current screen brightness value based on the target duty ratio.
In one embodiment, the method further comprises: reading a pre-measured initial backlight curve; wherein the initial backlight curve is used for representing a second mapping relation between the screen brightness value and the screen brightness percentage; and adjusting the initial backlight curve to obtain the two-segment backlight curve.
In one embodiment, the step of adjusting the initial backlight curve to obtain the two-segment backlight curve includes: dividing the initial backlight curve into a first interval and a second interval; carrying out nonlinear interpolation processing on a first interval of the initial backlight curve to obtain a nonlinear interval; and performing linear interpolation smoothing processing on the second interval of the initial backlight curve to obtain the linear interval.
In an embodiment, an embodiment of the present invention further provides an apparatus for adjusting a luminance value of a backlight, including: the brightness value acquisition module is used for acquiring the current screen brightness value of the screen to be adjusted; the current value determining module is used for determining a backlight current value corresponding to the current screen brightness value according to a pre-configured two-section backlight curve; wherein the two-segment backlight curve comprises a linear region and a nonlinear region; and the backlight adjusting module is used for adjusting the backlight brightness value of the screen to be adjusted based on the backlight current value.
In one embodiment, the two-step backlight curve comprises a first mapping relationship between a screen brightness value and a screen brightness percentage; the current value determination module is further to: determining a target screen brightness percentage corresponding to the current screen brightness value according to a pre-configured two-section type backlight curve; calculating the backlight grade of the target screen brightness percentage in a preset backlight grade interval; and determining the backlight current value corresponding to the current screen brightness value based on the backlight grade of the target screen brightness percentage.
In one embodiment, an embodiment of the present invention further provides an electronic device, including a processor and a memory; the memory has stored thereon a computer program which, when executed by the processor, performs the method of any of the above embodiments.
In one embodiment, the present invention further provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor implements the steps of the method as described in any one of the embodiments above.
According to the method, the device, the electronic equipment and the storage medium for adjusting the backlight brightness value, the current screen brightness value of a screen to be adjusted is obtained, the backlight current value corresponding to the current screen brightness value is determined according to a pre-configured two-section type backlight curve (including a linear interval and a nonlinear interval), and then the backlight brightness value of the screen to be adjusted is adjusted based on the backlight current value. In the method, the backlight current value corresponding to the current screen brightness value is determined by using a two-section type backlight curve comprising a linear section and a nonlinear section, and the backlight brightness of the screen to be adjusted is adjusted based on the current value. Compared with the prior art in which a purely linear backlight brightness curve is adopted to adjust the backlight brightness value, the two-segment backlight curve provided by the embodiment of the invention better optimizes the corresponding relation between the screen brightness value and the backlight current value, thereby reducing the power consumption required by the screen to be adjusted, further better relieving the problem of poor temperature rise index of the whole machine of the screen to be adjusted, and effectively improving the endurance time of the screen to be adjusted.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic application environment diagram of a method for adjusting a backlight brightness value according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of a method for adjusting a backlight brightness value according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating an initial backlight curve according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a two-segment backlight curve according to an embodiment of the present invention;
fig. 5 is a schematic diagram illustrating an analysis of a backlight power consumption factor according to an embodiment of the present invention;
fig. 6 is a flowchart illustrating another method for adjusting a backlight brightness value according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an apparatus for adjusting a backlight brightness value according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the embodiments, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The current schemes for adjusting the backlight brightness of LCD screens mainly include the following two types: firstly, the Backlight brightness is regulated and controlled through a high-pass Backlight PWM (Pulse Width Modulation) hardware design, the scheme can include three hardware designs of PWM of a high-pass SCO (System-on-a-Chip), PWM of an EC (embedded Controller) Chip and PWM of an LCD (liquid crystal display), for example, the high-pass SCO Chip or the EC Chip outputs PWM duty ratio to a Backlight Driver IC (Backlight driving IC), and the Backlight driving IC regulates the LCD Backlight current according to the change of the PAM duty ratio, so that the brightness change of a Backlight LED is controlled; and secondly, sending a PWM signal through the EC chip to control the backlight brightness. However, the two schemes both adopt a pure linear backlight brightness curve, so the two schemes cause the LCD to have poor temperature rise index of the whole machine and simultaneously cause the LCD to have lower endurance time. In order to solve the above problems, the embodiments of the present invention provide a method and an apparatus for adjusting a backlight brightness value, an electronic device, and a storage medium, which can better alleviate the problem of poor temperature rise index of an LCD, and can also effectively improve the endurance time of the LCD.
The method for adjusting the backlight brightness value provided by the embodiment of the invention can be applied to the application environment shown in fig. 1. The method for adjusting the backlight brightness value is applied to a backlight brightness adjusting system. The system includes a terminal 102 and a server 104. Wherein the terminal 102 and the server 104 communicate via a network. The current screen brightness value of the screen to be adjusted is obtained through the terminal 102, and then the backlight current value corresponding to the current screen brightness value is determined according to the pre-configured two-segment backlight curve, so that the backlight brightness value of the screen to be adjusted is adjusted based on the backlight current value. The terminal may be an electronic device configured with an LCD screen, the electronic device may not be limited to various televisions, personal computers, notebook computers, and the like, and the server 104 may be implemented by an independent server or a server cluster formed by a plurality of servers.
To facilitate understanding of the present embodiment, first, a detailed description is given to a method for adjusting a backlight brightness value disclosed in the present embodiment, which is mainly illustrated by applying the method to the terminal 102 in fig. 1, and referring to a flowchart of a method for adjusting a backlight brightness value shown in fig. 2, the method mainly includes the following steps S202 to S206:
step S202, obtaining the current screen brightness value of the screen to be adjusted.
The screen to be adjusted may be an LCD screen of the terminal 102, where the backlight brightness is to be adjusted, and the physical unit of the screen brightness value is nit (nit). In practical applications, the current screen brightness value of the LCD screen may be measured using a brightness measuring device. In one embodiment, the terminal and the brightness measuring device can communicate with each other through a network, then the brightness measuring device automatically uploads the measured current screen brightness value to the terminal, and the terminal obtains the current screen brightness value. In another embodiment, the server and the brightness measuring device may communicate with each other via a network, and the brightness measuring device uploads the measured current screen brightness value to the server, so that the terminal obtains the current screen brightness value from the server.
Step S204, determining a backlight current value corresponding to the current screen brightness value according to a pre-configured two-segment backlight curve.
The two-segment backlight curve comprises a linear interval and a non-linear interval, the two-segment backlight curve is used for representing a first mapping relation between the screen brightness value and the screen brightness percentage, and the two-segment backlight curve can be obtained by adjusting a pure linear backlight brightness curve in the prior art. In an embodiment, a third mapping relationship between the screen brightness percentage and the backlight current value may be further configured, so that the terminal may determine the backlight current value corresponding to the current screen brightness value by combining the first mapping relationship represented by the two-segment backlight curve and the third mapping relationship, where the third mapping relationship may include a plurality of sub-mapping relationships, such as a sub-mapping relationship between the screen brightness percentage and the backlight level, a sub-mapping relationship between the backlight level and the PWM duty ratio, a sub-mapping relationship between the PWM duty ratio and the backlight current value, and the like. In a specific implementation manner, a control chip, an EC chip and a backlight driving IC are arranged in a terminal, the control chip in the terminal determines a target screen brightness percentage corresponding to a current screen brightness value based on a first mapping relation represented in a two-segment backlight curve, and determines a target backlight level where the target screen brightness percentage is located, the control chip transmits the target backlight level to the EC chip, the EC chip calculates a PWM duty ratio based on the target backlight level, and the backlight driving IC calculates a backlight current value according to the PWM duty ratio.
In step S206, the backlight brightness value of the screen to be adjusted is adjusted based on the backlight current value.
In a specific embodiment, the backlight brightness value of the screen to be adjusted can be adjusted by the backlight driving IC in the terminal based on the backlight current value, and the user can experience the brightness change of the backlight brightness value of the screen to be adjusted.
Compared with the prior art in which a purely linear backlight brightness curve is adopted to adjust the backlight brightness value, the two-segment backlight curve provided by the embodiment of the invention better optimizes the corresponding relationship between the screen brightness value and the backlight current value, thereby reducing the power consumption required by the screen to be adjusted, further better relieving the problem of poor temperature rise index of the whole machine of the screen to be adjusted, and effectively improving the endurance time of the screen to be adjusted.
Before the step S204 is executed, an embodiment of the present invention further provides a two-segment backlight curve obtaining method, in one implementation, a pre-determined initial backlight curve may be read, and then the initial backlight curve is adjusted to obtain a two-segment backlight curve. Wherein the initial backlight curve is used for representing a second mapping relation between the screen brightness value and the screen brightness percentage. In some embodiments, the terminal may be configured with a storage chip for storing an initial backlight curve, and when the backlight brightness value of the screen to be adjusted of the terminal needs to be adjusted, the control chip may directly read the initial backlight curve from the storage chip; the initial backlight curve can also be stored in a designated storage area in the server, and the server sends the initial backlight curve to the terminal through network communication, so that the control chip of the terminal adjusts the initial backlight curve to obtain the required two-section backlight curve. Specifically, the present invention exemplarily provides an implementation manner of adjusting an initial backlight curve to obtain a two-segment backlight curve, which is shown in the following steps a to c:
step a, dividing an initial backlight curve into a first interval and a second interval. Referring to fig. 3, which is a schematic diagram of an initial backlight curve, it can be seen that the initial backlight curve is a pure linear curve, and in addition, the embodiment of the present invention further exemplarily provides a second mapping relationship between a screen brightness value and a screen brightness percentage (i.e., PWM%) in the initial backlight curve, as shown in table 1. In one embodiment, 0-40% of the initial backlight curve may be used as the first interval, and 40-100% may be used as the second interval.
TABLE 1
| PWM％ | |
| 100％ | 500 |
| 90％ | 450 |
| 80％ | 405 |
| 70％ | 356 |
| 60％ | 310 |
| 50％ | 260 |
| 40％ | 210 |
| 30％ | 155 |
| 20％ | 100 |
| 10％ | 50 |
| 0％ | 4 |
And b, carrying out nonlinear interpolation processing on the first interval of the initial backlight curve to obtain a nonlinear interval. In one embodiment, a smoother non-linearity is used for data interpolation for a 40% to 0% interval of the initial backlight curve, so as to obtain a non-linear interval of the two-segment backlight luminance curve.
And c, performing linear interpolation smoothing processing on the second interval of the initial backlight curve to obtain a linear interval. In one embodiment, a linear interpolation smoothing process may be performed on a 100% to 40% interval of the initial backlight curve to obtain a linear interval of the two-segment backlight luminance curve. Specifically, the screen brightness percentage takes the maximum screen brightness value of 250nit as an upper limit, and the screen brightness value is reduced by dividing every 2% of the percentage as a scale.
In a specific implementation, the terminal processes the initial backlight curve according to the steps a to c to obtain a schematic diagram of a two-stage backlight curve as shown in fig. 4, where 0-40% of the interval is a non-linear interval, and 40% -100% of the interval is a linear interval, and in addition, the terminal refers to table 2 to represent a first mapping relationship between a screen brightness value and a screen brightness percentage in the two-stage backlight curve. In addition, in order to speed up the efficiency of adjusting the backlight brightness value, because the initial backlight curve of the terminal is usually not changed, the embodiment of the invention can directly store the backlight curve in the storage chip after obtaining the two-segment backlight curve based on the initial backlight curve, and can directly adjust the two-segment backlight curve from the storage chip when the backlight brightness value of the terminal is adjusted subsequently, thereby improving the efficiency of adjusting the backlight brightness value to a certain extent.
TABLE 2
To facilitate understanding of the step S204, an embodiment of the present invention provides a specific implementation manner for determining a backlight current value corresponding to a current screen brightness value according to a pre-configured two-segment backlight curve, where the two-segment backlight curve is used to represent a first mapping relationship between a screen brightness value and a screen brightness percentage, and specifically refer to the following steps 1 to 3:
And 2, calculating the target backlight level of the target screen brightness percentage in the preset backlight level interval. The preset backlight grade interval can be 0-255. In an embodiment, the control chip may determine the target backlight level at which the target screen brightness percentage is located by using an Advanced Configuration and Power Management Interface (ACPI) function, and specifically, in a high-pass blcp (backlight level cp) Interface function in the ACPI function, calculate a product of the target screen brightness percentage and an upper limit value of a preset backlight level interval to obtain the target backlight level at which the target screen brightness percentage is located. For example, when the screen brightness percentage is 60%, the backlight level is 255 × 60 ═ 153.
And 3, determining a backlight current value corresponding to the current screen brightness value based on the target backlight level of the target screen brightness percentage. In one embodiment, a target duty ratio corresponding to the target backlight level may be first determined according to a pre-configured correspondence relationship between the backlight level and the duty ratio, and then a backlight current value corresponding to the current screen brightness value may be determined based on the target duty ratio. Specifically, the target backlight grade can be transmitted to the EC chip by using the BLCP interface function, the EC chip determines the target duty ratio corresponding to the target backlight grade according to the preset correspondence between the backlight grade and the duty ratio, and then determines the backlight current value according to the target duty ratio output by the EC chip based on the backlight driving IC.
In order to solve the factors of the LCD having problems such as poor temperature rise index of the whole LCD and endurance time period caused by the conventional backlight brightness adjusting method, the embodiment of the present invention analyzes the backlight power consumption factor, and referring to an analysis diagram of the backlight power consumption factor shown in fig. 5, first, the backlight power consumption influence factor mainly includes two aspects of software factors and hardware factors. The software factors comprise a backlight Brightness curve factor and a CABC (backlight dynamic Control) factor, wherein the backlight Brightness curve factor comprises a user defined curve and a label alignment curve, and the CABC factor comprises a constant video backlight current consumption during Disable CABC playing, a dynamic video backlight current consumption during Enable CABC playing and the like; the hardware factors further include backlight LED current-limiting resistance setting factors and backlight individual LED lamp bead power difference factors, the resistance setting maximum brightness value (for example, the maximum brightness value 360nit of the mobile phone screen) in the backlight LED current-limiting resistance setting factors, and the backlight individual LED lamp bead power difference factors need to be defined by the screen manufacturer control. The method for adjusting the backlight brightness provided by the embodiment of the invention is provided for the backlight brightness curve factor.
To facilitate understanding of the method for adjusting backlight brightness values provided in the foregoing embodiments, the embodiment of the present invention further provides another method for adjusting backlight brightness values, referring to a flowchart of another method for adjusting backlight brightness values shown in fig. 6, where the method is executed by a terminal configured with an LCD screen, and a control chip, an EC chip, and a backlight driver IC are disposed in the terminal, and the method mainly includes the following steps S602 to S608:
step S602, determining a backlight level in response to a sliding operation for a backlight luminance bar in the Windows interface. In specific implementation, a user is required to measure the current screen brightness value of the Windows interface by using a brightness measuring device, after the terminal obtains the measured current screen brightness value, the backlight grade corresponding to the current screen brightness value can be determined based on the two-segment backlight curve, and then the backlight grade is determined by using the ACPI function according to the method shown in the step 2.
Step S604, the PWM duty ratio is transferred to the EC chip by using the BLCP interface in the ACPI function based on the backlight level. In one embodiment, the PWM duty cycle may be calculated as follows: the backlight level is (N/255) Gamma value. Wherein, the backlight level can also be called 256 gray levels; n represents a PWM duty cycle; the Gamma value represents a parameter of the luminance response characteristic of the LCD device, and is generally constant and configurable by the manufacturer of the terminal.
In step S606, the backlight driving IC adjusts the backlight current value based on the PWM duty.
In step S608, the backlight brightness value is adjusted according to the backlight current value.
In summary, the method for adjusting the backlight brightness value according to the embodiment of the present invention optimizes the mapping relationship between the screen brightness value and the screen brightness percentage through the two-segment backlight brightness curve, and reduces the backlight power consumption on the premise of not affecting the subjective and objective characteristics of the LCD device, thereby improving the temperature rise scene and increasing the overall endurance index time of the whole LCD device.
As to the foregoing method for adjusting a backlight brightness value provided in the foregoing embodiment, an embodiment of the present invention provides an apparatus for adjusting a backlight brightness value, referring to a schematic structural diagram of an apparatus for adjusting a backlight brightness value shown in fig. 7, where the apparatus mainly includes the following components:
a brightness value obtaining module 702, configured to obtain a current screen brightness value of the screen to be adjusted.
A current value determining module 704, configured to determine a backlight current value corresponding to a current screen brightness value according to a pre-configured two-segment backlight curve; the two-segment backlight curve comprises a linear region and a nonlinear region.
And the backlight adjusting module 706 is configured to adjust a backlight brightness value of the screen to be adjusted based on the backlight current value.
Compared with the prior art in which a purely linear backlight brightness curve is adopted to adjust the backlight brightness value, the two-segment backlight curve provided by the embodiment of the invention better optimizes the corresponding relationship between the screen brightness value and the backlight current value, thereby reducing the power consumption required by the screen to be adjusted, further better relieving the problem of poor temperature rise index of the whole machine of the screen to be adjusted, and effectively improving the endurance time of the screen to be adjusted.
In one embodiment, the two-segment backlight curve includes a first mapping relationship between a screen brightness value and a screen brightness percentage; current value determination module 704 is further configured to: determining a target screen brightness percentage corresponding to the current screen brightness value according to a pre-configured two-section type backlight curve; calculating a target backlight grade of the target screen brightness percentage in a preset backlight grade interval; and determining the backlight current value corresponding to the current screen brightness value based on the target backlight level at which the target screen brightness percentage is positioned.
In one embodiment, current value determination module 704 is further configured to: and calculating the product of the target screen brightness percentage and the upper limit value of the preset backlight grade interval to obtain the target backlight grade of the target screen brightness percentage.
In one embodiment, current value determination module 704 is further configured to: determining a target duty ratio corresponding to the target backlight grade according to a preset corresponding relation between the backlight grade and the duty ratio; and determining the backlight current value corresponding to the current screen brightness value based on the target duty ratio.
In one embodiment, the apparatus further comprises a curve adjustment module configured to: reading a pre-measured initial backlight curve; the initial backlight curve is used for representing a second mapping relation between the screen brightness value and the screen brightness percentage; and adjusting the initial backlight curve to obtain a two-section backlight curve.
In one embodiment, the curve adjustment module is further configured to: dividing an initial backlight curve into a first interval and a second interval; carrying out nonlinear interpolation processing on a first interval of the initial backlight curve to obtain a nonlinear interval; and performing linear interpolation smoothing processing on the second interval of the initial backlight curve to obtain a linear interval.
The device provided by the embodiment of the present invention has the same implementation principle and technical effect as the method embodiments, and for the sake of brief description, reference may be made to the corresponding contents in the method embodiments without reference to the device embodiments.
The embodiment of the invention provides electronic equipment, which particularly comprises a processor and a storage device; the storage means has stored thereon a computer program which, when executed by the processor, performs the method of any of the above described embodiments.
Fig. 8 is a schematic structural diagram of an electronic device 100 according to an embodiment of the present invention, where the electronic device 100 includes: the device comprises a processor 80, a memory 81, a bus 82 and a communication interface 83, wherein the processor 80, the communication interface 83 and the memory 81 are connected through the bus 82; the processor 80 is arranged to execute executable modules, such as computer programs, stored in the memory 81.
The Memory 81 may include a high-speed Random Access Memory (RAM) and may also include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. The communication connection between the network element of the system and at least one other network element is realized through at least one communication interface 83 (which may be wired or wireless), and the internet, a wide area network, a local network, a metropolitan area network, etc. may be used.
Bus 82 may be an ISA bus, PCI bus, EISA bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one double-headed arrow is shown in FIG. 8, but that does not indicate only one bus or one type of bus.
The memory 81 is used for storing a program, the processor 80 executes the program after receiving an execution instruction, and the method executed by the apparatus defined by the flow process disclosed in any of the foregoing embodiments of the present invention may be applied to the processor 80, or implemented by the processor 80.
The processor 80 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 80. The Processor 80 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the device can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory 81, and the processor 80 reads the information in the memory 81 and performs the steps of the above method in combination with its hardware.
The computer program product of the readable storage medium provided in the embodiment of the present invention includes a computer readable storage medium storing a program code, where instructions included in the program code may be used to execute the method described in the foregoing method embodiment, and specific implementation may refer to the foregoing method embodiment, which is not described herein again.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A method for adjusting a brightness value of a backlight, comprising:
acquiring a current screen brightness value of a screen to be adjusted;
determining a target screen brightness percentage corresponding to the current screen brightness value according to a pre-configured two-section type backlight curve; the two-section type backlight curve is used for representing a first mapping relation between a screen brightness value and a screen brightness percentage; the two-section type backlight curve comprises a linear interval and a non-linear interval;
calculating the product of the target screen brightness percentage and the upper limit value of a preset backlight grade interval to obtain the target backlight grade of the target screen brightness percentage;
determining a backlight current value corresponding to the current screen brightness value based on the target backlight level of the target screen brightness percentage;
and adjusting the backlight brightness value of the screen to be adjusted based on the backlight current value.
2. The method of claim 1, wherein the step of determining the backlight current value corresponding to the current screen brightness value based on the target backlight level at which the target screen brightness percentage is located comprises:
determining a target duty ratio corresponding to the target backlight grade according to a preset corresponding relation between the backlight grade and the duty ratio;
and determining the backlight current value corresponding to the current screen brightness value based on the target duty ratio.
3. The method of claim 1, further comprising:
reading a pre-measured initial backlight curve; wherein the initial backlight curve is used for representing a second mapping relation between the screen brightness value and the screen brightness percentage;
and adjusting the initial backlight curve to obtain the two-segment backlight curve.
4. The method of claim 3, wherein the step of adjusting the initial backlight curve to obtain the two-step backlight curve comprises:
dividing the initial backlight curve into a first interval and a second interval;
carrying out nonlinear interpolation processing on a first interval of the initial backlight curve to obtain a nonlinear interval;
and performing linear interpolation smoothing processing on the second interval of the initial backlight curve to obtain the linear interval.
5. An apparatus for adjusting a brightness value of a backlight, comprising:
the brightness value acquisition module is used for acquiring the current screen brightness value of the screen to be adjusted;
the current value determining module is used for determining the target screen brightness percentage corresponding to the current screen brightness value according to a pre-configured two-section type backlight curve; the two-section type backlight curve is used for representing a first mapping relation between a screen brightness value and a screen brightness percentage; the two-section type backlight curve comprises a linear interval and a non-linear interval; calculating the product of the target screen brightness percentage and the upper limit value of a preset backlight grade interval to obtain the target backlight grade of the target screen brightness percentage; determining a backlight current value corresponding to the current screen brightness value based on the target backlight level of the target screen brightness percentage;
and the backlight adjusting module is used for adjusting the backlight brightness value of the screen to be adjusted based on the backlight current value.
6. An electronic device comprising a processor and a memory;
the memory has stored thereon a computer program which, when executed by the processor, performs the method of any of claims 1 to 4.
7. 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 4.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010563567.5A CN111681614B (en) | 2020-06-18 | 2020-06-18 | Backlight brightness value adjusting method and device, electronic equipment and storage medium |
| PCT/CN2021/100694 WO2021254455A1 (en) | 2020-06-18 | 2021-06-17 | Backlight brightness value adjustment method and apparatus, and electronic device and storage medium |
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| CN202010563567.5A CN111681614B (en) | 2020-06-18 | 2020-06-18 | Backlight brightness value adjusting method and device, electronic equipment and storage medium |
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| CN111681614B (en) * | 2020-06-18 | 2021-09-14 | 上海闻泰电子科技有限公司 | Backlight brightness value adjusting method and device, electronic equipment and storage medium |
| CN112382245A (en) * | 2020-11-20 | 2021-02-19 | 深圳市创智成科技股份有限公司 | Backlight adjusting method, device and system and storage medium |
| CN112667188A (en) * | 2020-12-28 | 2021-04-16 | 长沙湘计海盾科技有限公司 | Display brightness control method, device, system, electronic terminal and readable storage medium |
| CN113129847B (en) | 2021-04-13 | 2022-07-12 | Tcl华星光电技术有限公司 | Backlight brightness control method and device and display equipment |
| CN113260110B (en) * | 2021-04-28 | 2023-03-24 | 广州彩熠灯光股份有限公司 | Brightness control method, device, equipment and storage medium |
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| US8094118B2 (en) * | 2005-03-02 | 2012-01-10 | University Of Southern California | Dynamic backlight scaling for power minimization in a backlit TFT-LCD |
| CN101295467B (en) * | 2007-04-29 | 2011-06-01 | 瑞昱半导体股份有限公司 | Contrast control device and control method thereof |
| KR101320018B1 (en) * | 2007-12-04 | 2013-10-18 | 삼성디스플레이 주식회사 | Light source and driving method the same and display device having the same |
| CN101645231B (en) * | 2009-04-02 | 2012-04-18 | 青岛海信电器股份有限公司 | Method and device for regulating back light brightness of display |
| CN102248922A (en) * | 2011-03-09 | 2011-11-23 | 奇瑞汽车股份有限公司 | Automobile backlight control system and control method thereof |
| CN102930850B (en) * | 2012-11-16 | 2015-07-15 | Tcl显示科技（惠州）有限公司 | GAMMA curve adjustment method and GAMMA curve adjustment system |
| CN105427815A (en) * | 2016-01-12 | 2016-03-23 | 浙江德景电子科技有限公司 | Method and apparatus for adjusting backlight brightness |
| CN106448578A (en) * | 2016-12-22 | 2017-02-22 | 广东欧珀移动通信有限公司 | Display screen back light control method, display screen back light control device and computer equipment |
| CN109859721A (en) * | 2019-04-02 | 2019-06-07 | Oppo广东移动通信有限公司 | Brightness of display screen adjusting method, device, mobile terminal and storage medium |
| CN110599967B (en) * | 2019-09-19 | 2021-06-08 | 深圳市万普拉斯科技有限公司 | Image display method and device, electronic equipment and readable storage medium |
| CN111681614B (en) * | 2020-06-18 | 2021-09-14 | 上海闻泰电子科技有限公司 | Backlight brightness value adjusting method and device, electronic equipment and storage medium |
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