WO2024078149A1 - 显示屏亮度调节方法及电子设备 - Google Patents

显示屏亮度调节方法及电子设备 Download PDF

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Publication number
WO2024078149A1
WO2024078149A1 PCT/CN2023/114667 CN2023114667W WO2024078149A1 WO 2024078149 A1 WO2024078149 A1 WO 2024078149A1 CN 2023114667 W CN2023114667 W CN 2023114667W WO 2024078149 A1 WO2024078149 A1 WO 2024078149A1
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WO
WIPO (PCT)
Prior art keywords
brightness
display screen
attenuation coefficient
adjustment
electronic device
Prior art date
Application number
PCT/CN2023/114667
Other languages
English (en)
French (fr)
Inventor
马骋宇
张友军
吉庆
张伟
王朝
Original Assignee
荣耀终端有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202211250558.6A external-priority patent/CN116741087B/zh
Application filed by 荣耀终端有限公司 filed Critical 荣耀终端有限公司
Publication of WO2024078149A1 publication Critical patent/WO2024078149A1/zh

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Classifications

    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/30—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 using controlled light sources using electroluminescent panels
    • G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/30—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 using controlled light sources using electroluminescent panels
    • G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • 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
    • G09G5/10—Intensity circuits
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

Definitions

  • the present application relates to the field of display technology, and in particular to a display screen brightness adjustment method and an electronic device.
  • the main component of an electronic device to realize the display function is the display screen.
  • the display screen is displaying, there is a difference between its maximum brightness and the set maximum brightness.
  • the present application provides a display brightness adjustment method and an electronic device.
  • the brightness of different screens can be balanced.
  • the power consumption of the electronic device can be reduced; when the maximum brightness of the low-brightness screen is increased alone, the display effect of the electronic device can be improved.
  • an embodiment of the present application provides a method for adjusting the brightness of a display screen, which is applied to an electronic device, wherein the electronic device includes a display screen.
  • the method for adjusting the brightness of the display screen includes: obtaining a brightness attenuation coefficient of the display screen, wherein the brightness attenuation coefficient is determined based on the maximum brightness and typical maximum brightness of the display screen; and adjusting the brightness of the display screen based on the brightness attenuation coefficient.
  • the brightness attenuation coefficient is determined based on the maximum brightness and typical maximum brightness of the display screen to be tested.
  • the display brightness of the display screen is adjusted based on the brightness attenuation coefficient. In this way, the maximum brightness of the high-brightness screen is reduced, and the maximum brightness of the low-brightness screen is increased, so that the brightness of different display screens is balanced.
  • the maximum brightness of the high-brightness screen is reduced alone (the corresponding current driving the LED lamp to emit light is reduced)
  • the power consumption of the electronic device can be reduced; when the maximum brightness of the low-brightness screen is increased alone, the display effect of the electronic device can be improved.
  • the maximum brightness of the display screen is the maximum brightness actually measured when the display screen is displayed under the drive of the preset voltage and the preset current before adjustment.
  • the typical maximum brightness is the maximum brightness theoretically achieved when the display screen is displayed under the drive of the preset voltage and the preset current.
  • the brightness of the display screen is adjusted based on the brightness attenuation coefficient so that the difference between the maximum brightness of the display screen after adjustment and the typical maximum brightness is within a preset difference range, wherein the preset difference range may be, for example, zero, that is, the difference between the maximum brightness of the display screen after adjustment and the typical maximum brightness is zero.
  • the difference between the maximum brightness of the display screen after adjustment and the typical maximum brightness is not limited to zero, and the difference between the maximum brightness of the display screen after adjustment and the typical maximum brightness only needs to be less than the difference between the maximum brightness of the display screen before adjustment and the typical maximum brightness.
  • the power consumption of the electronic device can be reduced while ensuring a better effect; when the maximum brightness of the low-brightness screen is increased alone, the display effect of the electronic device is further improved.
  • adjusting the brightness of the display screen based on the brightness attenuation coefficient includes: adjusting the driving current for driving the display screen to display based on the brightness attenuation coefficient.
  • the method is simple and the calculation is simple.
  • the display screen includes a liquid crystal display screen; the liquid crystal display screen includes a display panel and a backlight module, and the backlight module includes a backlight chip and a backlight source; the driving current that drives the display screen to display is adjusted based on the brightness attenuation coefficient, including: adjusting the current output from the backlight chip to the backlight source based on the brightness attenuation coefficient, and the current can drive the backlight source to emit light.
  • the display screen is not limited to a liquid crystal display screen, and any display screen can achieve the purpose of approaching the typical maximum brightness by using this solution. It can be understood that when the display screen is other types of display screens, the maximum brightness during display can be close to or equal to the typical maximum brightness by changing other corresponding parameters.
  • the first driving current is determined by a coarse adjustment current part and a fine adjustment current part, wherein the first driving current is the driving current corresponding to the maximum brightness of the display screen before adjustment; the driving current for driving the display screen to display is adjusted based on the brightness attenuation coefficient, including: the coarse adjustment current part remains unchanged, and the fine adjustment current part is adjusted based on the brightness attenuation coefficient to form a second driving current, wherein the second driving current is the driving current corresponding to the maximum brightness of the display screen after adjustment, the adjustment method is simple, and the computing speed of the electronic device is improved.
  • the difference between the maximum brightness of the display screen after adjustment and the typical maximum brightness can be minimized, that is, the maximum brightness of the display screen after adjustment is close to the typical maximum brightness, or the same as the typical maximum brightness.
  • the power consumption of the electronic device can be reduced while ensuring a better effect; when the maximum brightness of the low-brightness screen is increased alone, the display effect of the electronic device is further improved.
  • the typical maximum brightness is 430 nit. This brightness has a good display effect and improves the user experience.
  • the typical maximum brightness is not limited to this. Those skilled in the art can make the selection according to actual situation.
  • an embodiment of the present application provides an electronic device, which includes: a display screen; the electronic device also includes: a storage unit for storing a brightness attenuation coefficient, wherein the brightness attenuation coefficient is determined based on the maximum brightness and typical maximum brightness of the display screen; an acquisition module for acquiring the brightness attenuation coefficient; and an adjustment module for adjusting the brightness of the display screen according to the brightness attenuation coefficient.
  • the brightness attenuation coefficient is determined based on the maximum brightness and typical maximum brightness of the display screen to be tested.
  • the display brightness of the display screen is adjusted based on the brightness attenuation coefficient. In this way, the maximum brightness of the high-brightness screen is reduced, and the maximum brightness of the low-brightness screen is increased, so that the brightness of different display screens is balanced.
  • the maximum brightness of the high-brightness screen is reduced alone (the corresponding current driving the LED lamp to emit light is reduced)
  • the power consumption of the electronic device can be reduced; when the maximum brightness of the low-brightness screen is increased alone, the display effect of the electronic device can be improved.
  • the maximum brightness of the display screen is the maximum brightness actually measured when the display screen is displayed under the drive of the preset voltage and the preset current before adjustment.
  • the typical maximum brightness is the maximum brightness theoretically achieved when the display screen is displayed under the drive of the preset voltage and the preset current.
  • the brightness of the display screen is adjusted based on the brightness attenuation coefficient so that the difference between the maximum brightness of the display screen after adjustment and the typical maximum brightness is within a preset difference range, wherein the preset difference range may be, for example, zero, that is, the difference between the maximum brightness of the display screen after adjustment and the typical maximum brightness is zero.
  • the difference between the maximum brightness of the display screen after adjustment and the typical maximum brightness is not limited to zero, and the difference between the maximum brightness of the display screen after adjustment and the typical maximum brightness only needs to be less than the difference between the maximum brightness of the display screen before adjustment and the typical maximum brightness.
  • the electronic device also includes a basic input-output system and an embedded controller, which is electrically connected to the basic input-output system; the basic input-output system is multiplexed as a storage unit for storing a brightness attenuation coefficient; the embedded controller is multiplexed as an acquisition module and an adjustment module for acquiring the brightness attenuation coefficient and adjusting the brightness of the display screen according to the brightness attenuation coefficient.
  • the brightness of the display screen can be adjusted through the basic input and output system and embedded controller of the electronic device without separate settings, which saves costs and space inside the electronic device and is conducive to the setting of other structures in the electronic device.
  • the electronic device also includes a processor electrically connected to the display screen; the display screen includes a storage unit, and the storage unit stores a brightness attenuation coefficient; the processor is used to obtain the brightness attenuation coefficient stored in the storage unit, and send the brightness attenuation coefficient to a basic input and output system, so that the basic input and output system stores the brightness attenuation coefficient.
  • the brightness of the display screen can be adjusted through the existing processor, basic input and output system and storage unit of the electronic device without separate settings, which saves costs and space inside the electronic device and is conducive to the setting of other structures in the electronic device.
  • the electronic device includes a processor, a graphics card basic input and output system, and an embedded controller;
  • the display screen includes a storage unit, and the storage unit stores brightness decay information.
  • the processor is electrically connected to the display screen and the basic input and output system of the graphics card respectively, and is used to obtain the brightness attenuation coefficient stored in the storage unit, and send the brightness attenuation coefficient to the basic input and output system of the graphics card, so that the basic input and output system of the graphics card stores the brightness attenuation coefficient;
  • the embedded controller is multiplexed into an acquisition module and an adjustment module, which is electrically connected to the basic input and output system of the graphics card, and is used to obtain the brightness attenuation coefficient stored in the basic input and output system of the graphics card, and adjust the brightness of the display screen according to the brightness attenuation coefficient.
  • the brightness of the display screen can be adjusted through the existing processor, graphics card basic input and output system, embedded controller and storage unit of the electronic device without separate settings, which saves costs and space inside the electronic device and is conducive to the setting of other structures in the electronic device.
  • the display screen includes a storage unit; the electronic device also includes a processor, which is electrically connected to the display screen; the processor is multiplexed into an acquisition module and an adjustment module; the processor is used to obtain a brightness attenuation coefficient and adjust the brightness of the display screen according to the brightness attenuation coefficient.
  • the brightness of the display screen can be adjusted by using the existing processor and storage unit of the electronic device without the need for separate settings, thus saving costs and space inside the electronic device, and facilitating the setting of other structures in the electronic device.
  • the power consumption of the electronic device can be reduced while ensuring a better effect; when the maximum brightness of the low-brightness screen is increased alone, the display effect of the electronic device is further improved.
  • the adjustment module is specifically used to adjust the driving current for driving the display screen to display according to the brightness attenuation coefficient.
  • the method is simple and the calculation is simple.
  • the display screen includes a liquid crystal display screen; the liquid crystal display screen includes a display panel and a backlight module, and the backlight module includes a backlight chip and a backlight source; the backlight chip is electrically connected to the backlight source and the adjustment module respectively; the adjustment module is used to adjust the current output from the backlight chip to the backlight source according to the brightness attenuation coefficient, and the current can drive the backlight source to emit light.
  • the display screen is not limited to liquid crystal display screens, and any display screen can achieve the purpose of approaching the typical maximum brightness by adopting this solution. It can be understood that when the display screen is other types of display screens, the maximum brightness during display can be close to or equal to the typical maximum brightness by changing other corresponding parameters.
  • the first driving current is determined by a coarse adjustment current part and a fine adjustment current part, wherein the first driving current is a driving current corresponding to the maximum brightness of the display screen before adjustment; the adjustment module is specifically used to adjust the fine adjustment current part according to the brightness attenuation coefficient to form a second driving current, wherein the coarse adjustment current part remains unchanged, and the second driving current is a current corresponding to the maximum brightness of the display screen after adjustment,
  • the adjustment method is simple and improves the computing speed of electronic equipment.
  • the power consumption of the electronic device can be reduced while ensuring a better effect; when the maximum brightness of the low-brightness screen is increased alone, the display effect of the electronic device is further improved.
  • the typical maximum brightness is 430 nit. This brightness has a good display effect and improves the user experience.
  • the typical maximum brightness is not limited to this, and those skilled in the art can choose according to actual conditions.
  • electronic devices include laptop computers, etc. As long as the electronic devices can display, they are within the protection scope of the embodiments of the present application, and the electronic devices have the characteristics of long standby time or good display effect.
  • an embodiment of the present application provides a computer-readable storage medium.
  • the computer-readable storage medium includes a computer program, and when the computer program is executed on an electronic device, the electronic device executes the display screen brightness adjustment method of the first aspect and any one of the first aspects.
  • the third aspect and any implementation of the third aspect correspond to the first aspect and any implementation of the first aspect, respectively.
  • the technical effects corresponding to the third aspect and any implementation of the third aspect can refer to the technical effects corresponding to the first aspect and any implementation of the first aspect, which will not be repeated here.
  • an embodiment of the present application provides a computer program product, including a computer program.
  • the computer program When the computer program is executed, the computer executes a display screen brightness adjustment method as described in the first aspect or any one of the first aspects.
  • the fourth aspect and any implementation of the fourth aspect correspond to the first aspect and any implementation of the first aspect, respectively.
  • the technical effects corresponding to the fourth aspect and any implementation of the fourth aspect can refer to the technical effects corresponding to the above-mentioned first aspect and any implementation of the first aspect, which will not be repeated here.
  • the present application provides a chip, the chip comprising a processing circuit and a transceiver pin, wherein the transceiver pin and the processing circuit communicate with each other through an internal connection path, and the processing circuit executes the display brightness adjustment method as in the first aspect or any one of the first aspects to control the receiving pin to receive a signal, and to control the sending pin to send a signal.
  • the fifth aspect and any implementation of the fifth aspect correspond to the first aspect and any implementation of the first aspect respectively.
  • the technical effects corresponding to the fifth aspect and any implementation of the fifth aspect can be referred to in See the above-mentioned first aspect and the technical effects corresponding to any implementation method of the first aspect, which will not be repeated here.
  • FIG1 shows a test scenario diagram of an electronic device provided in an embodiment of the present application
  • FIG2 shows a schematic structural diagram of a liquid crystal display screen provided in an embodiment of the present application
  • FIG3 shows a schematic diagram of a backlight chip driving a backlight source to light up according to an embodiment of the present application
  • FIG4 shows a schematic diagram of a circuit structure of an electronic device provided in an embodiment of the present application.
  • FIG5 shows a flow chart of a method for adjusting display screen brightness provided in Embodiment 1 of the present application
  • FIG6 shows a graph showing the relationship between the driving current output from the backlight chip to the backlight source and the brightness of the display screen according to an embodiment of the present application
  • FIG7 shows a flow chart of a method for adjusting display screen brightness provided in Embodiment 2 of the present application.
  • FIG8 shows a flow chart of a method for adjusting display brightness provided in Embodiment 3 of the present application.
  • FIG. 9 shows a flow chart of a method for adjusting display screen brightness provided in Embodiment 4 of the present application.
  • a and/or B in this article is merely a description of the association relationship of associated objects, indicating that three relationships may exist.
  • a and/or B can mean: A exists alone, A and B exist at the same time, and B exists alone.
  • first and second in the description and claims of the embodiments of the present application are used to distinguish different objects rather than to describe a specific order of objects.
  • a first target object and a second target object are used to distinguish different target objects rather than to describe a specific order of target objects.
  • words such as “exemplary” or “for example” are used to indicate examples, illustrations or descriptions. Any embodiment or design described as “exemplary” or “for example” in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as “exemplary” or “for example” is intended to present related concepts in a specific way.
  • multiple refers to two or more than two.
  • multiple processing units refer to two or more processing units; multiple systems refer to two or more systems.
  • FIG1 exemplarily shows a test scenario, in which the electronic device is a laptop computer as an example for explanation.
  • the maximum brightness of the display screen 11 of the laptop computer 100 will be measured before leaving the factory. After measurement, it is found that under the same current and voltage drive, the maximum brightness of the first display screen to be tested and the second display screen to be tested are different.
  • the maximum brightness of the first display screen to be tested 11a is, for example, 430 nit, where 430 nit is, for example, the typical maximum brightness.
  • the so-called typical maximum brightness is the maximum brightness that the display screen theoretically reaches under the drive of the preset current and preset voltage.
  • the maximum brightness of the second display screen 11b to be tested is 500 nit, which is greater than the typical maximum brightness.
  • the two displays consume the same amount of electricity, but the screen brightness is different, and the highlight display screen (i.e., the second display screen 11b to be tested) is much brighter than the typical display screen (the first display screen 11a to be tested).
  • the display screen 11 includes but is not limited to an LCD screen, and may also include, for example, an organic light emitting diode (OLED) display screen and an LED display screen, among which the LED display screen includes, for example, a Micro-LED display screen, a Mini-LED display screen, etc.
  • OLED organic light emitting diode
  • LED display screen includes, for example, a Micro-LED display screen, a Mini-LED display screen, etc.
  • the embodiment of the present application does not limit the type of the display screen 11.
  • FIG. 2 shows a schematic diagram of the structure of a liquid crystal display screen provided in an embodiment of the present application.
  • the LCD display screen includes a display panel 111 and a backlight module 112.
  • the backlight module 112 includes structures such as a backlight chip 112a, a backlight source 112b, and a light guide plate 112c.
  • the backlight chip 112a drives the backlight source 112b to light up, and the light generated when the backlight source 112b is lit, for example, enters from the side of the light guide plate 112c, and after being homogenized by the light guide plate 112c, it is emitted from the light emitting surface of the light guide plate 112c to the display panel 111, so that the display panel 111 displays.
  • FIG. 2 is an illustration of an example in which the backlight source 112 b is an edge-type light source, but does not constitute a limitation on the present application.
  • the backlight source 112 b may also be a direct-type light source.
  • FIG. 3 shows a schematic diagram of a backlight chip provided in an embodiment of the present application driving a backlight source to light up.
  • the backlight source 112 b includes six groups of LED lamps connected in parallel, i.e., six backlight channels, and each group of LED lamps includes eleven LED lamps. If the maximum brightness of the required display screen 11 during display is the typical maximum brightness (i.e., 430 nit), the backlight chip 112 a needs to provide a voltage of 33 V and a current of 20 mA for each backlight channel, and six channels need to provide a voltage of 33 V and a current of 120 mA.
  • the embodiments of the present application provide a method for adjusting the brightness of a display screen and an electronic device.
  • the brightness attenuation coefficient is determined based on the maximum brightness and typical maximum brightness of the display screen to be detected.
  • the display brightness of the display screen is adjusted based on the brightness attenuation coefficient. In this way, the maximum brightness of the high-brightness screen is reduced, and the maximum brightness of the low-brightness screen is increased, so that the brightness of different display screens is balanced.
  • the power consumption of the electronic device can be reduced; when the maximum brightness of the low-brightness screen is increased alone, the display effect of the electronic device can be improved.
  • the electronic device provided in the embodiments of the present application may be a laptop computer, a mobile phone, a desktop computer, a tablet computer, a personal digital assistant (PDA), a car computer, a television, a smart wearable device, a smart home device, and other smart terminals including display screens.
  • PDA personal digital assistant
  • the embodiments of the present application do not specifically limit the specific forms of the above-mentioned electronic devices.
  • the display screen brightness adjustment method and electronic device provided in the embodiments of the present application are described below, wherein the electronic device is a laptop computer as an example.
  • FIG4 shows a schematic diagram of a circuit structure of an electronic device provided in an embodiment of the present application.
  • a laptop computer 100 includes a display screen 11, a central processing unit (CPU) 10, an embedded controller (EC) 20, a basic input output system (BIOS) 30, a video card basic input output system (VBIOS) 40, etc.
  • CPU central processing unit
  • EC embedded controller
  • BIOS basic input output system
  • VBIOS video card basic input output system
  • the electronic device may include more or fewer components than shown in the figure, or combine some components, or split some components, or arrange the components differently.
  • CPU 10 is a large-scale integrated circuit, which is the computing core (core) and control unit (control unit) of the electronic device.
  • the processor can parse program instructions, process data and perform operations, etc.
  • EC 20 can operate when the electronic device is turned off or on. It mainly controls the power-on timing, keyboard and processes the underlying hardware related work, such as temperature detection, charging control and other functions.
  • the shutdown here means that some high-power devices (such as CPU, etc.) of the electronic device are powered off, but EC 20 remains powered on so that it can continue to work.
  • BIOS 30 is the first software loaded when the laptop starts up. It saves the most important basic input and output programs of the computer, the self-test program after powering on and the system self-starting program.
  • VBIOS 40 saves the most important basic input and output programs of the computer graphics card, the graphics card self-test program after powering on and the graphics card self-starting program. It can read and write the specific information of the graphics card in the system settings from CMOS. Its main function is to provide the graphics card with the lowest and most direct hardware settings and control.
  • the display screen 11 includes not only the display panel 111 and the backlight module 112 (including the backlight chip 112a and the backlight source 112b) mentioned above, but also a storage unit 113 for storing parameters such as manufacturer information and supported resolution of the display screen.
  • Fig. 5 shows a flow chart of a display screen brightness adjustment method provided in Embodiment 1 of the present application.
  • the display screen brightness adjustment method is introduced below in conjunction with the electronic device shown in Fig. 4.
  • the display brightness adjustment method can be implemented by the following steps:
  • the backlight chip 112a is controlled to provide a preset voltage and a preset current (such as 33V voltage and 20mA current) for each backlight channel, so that the display screen 11 can display, and the brightness displayed by the display screen 11 is the maximum brightness. Then, for example, a brightness meter can be used to measure the maximum brightness of the display screen at this time.
  • a preset voltage and a preset current such as 33V voltage and 20mA current
  • the maximum brightness can be obtained by using the nine-point method. Specifically, the display screen is divided into nine areas, the maximum brightness of each area is measured at the center of each area by a brightness meter, and the maximum brightness of the nine areas is averaged to determine the maximum brightness of the display screen.
  • the method of measuring the maximum brightness of a display screen is not limited to using a brightness meter, and other devices or methods can also be used as long as the maximum brightness can be measured.
  • using the nine-point method to obtain the maximum brightness of the display screen is only an example of the present application, but does not constitute a limitation of the present application.
  • the maximum brightness can also be obtained by using an eighty-one-point method, wherein the eighty-one-point method specifically divides the display screen into eighty-one areas, and uses a brightness meter to measure the maximum brightness of each area at the center of each area. The maximum brightness of the eighty-one areas is averaged to determine the maximum brightness of the display screen when it is displayed.
  • S502 Determine a brightness attenuation coefficient based on the measured maximum brightness and the typical maximum brightness.
  • the maximum brightness measured is: the backlight chip 112a provides a preset voltage and a preset current (such as a voltage of 33V and a current of 20mA) for each backlight channel, so that the display screen 11 displays, and the maximum brightness actually measured.
  • the typical maximum brightness is: the backlight chip 112a provides a preset voltage and a preset current (such as a voltage of 33V and a current of 20mA) for each backlight channel, so that the display screen 11 displays, and the maximum brightness theoretically achieved.
  • the maximum brightness actually measured is greater than the typical maximum brightness, it indicates that the display screen is driven at a preset voltage and a preset current with a maximum brightness that is too bright, which results in a waste of electricity. That is, the typical maximum brightness is required, but a higher brightness is actually obtained, which does not benefit the display effect.
  • the typical maximum brightness When the maximum brightness actually measured is less than the typical maximum brightness, it indicates that the maximum brightness of the display screen is darker when driven by the preset voltage and preset current, which will lead to poor display effect. That is, the typical maximum brightness is required, but the actual brightness is smaller, which affects the display effect.
  • the brightness attenuation coefficient can be determined based on the measured maximum brightness and typical maximum brightness.
  • the display brightness of the display screen can be adjusted based on the brightness attenuation coefficient. In this way, the maximum brightness of the high-brightness screen is reduced, and the maximum brightness of the low-brightness screen is increased, so that the brightness of different display screens is balanced.
  • the maximum brightness of the high-brightness screen is reduced alone (the corresponding current driving the LED lamp to emit light is reduced)
  • the power consumption of the electronic device can be reduced; when the maximum brightness of the low-brightness screen is increased alone, the display effect of the electronic device can be improved.
  • the specific adjustment method is introduced in the following steps.
  • the brightness attenuation coefficient is, for example, the ratio of the typical maximum brightness to the maximum brightness of the display screen before adjustment.
  • the maximum brightness actually measured is 500nit
  • the typical maximum brightness is 430nit
  • the brightness attenuation coefficient K 430nit/500nit.
  • the maximum brightness actually measured is 400nit
  • the typical maximum brightness is 430nit
  • the brightness attenuation coefficient K 430nit/400nit.
  • BIOS 30 is the first software loaded when the laptop starts up. It stores the most important basic input and output programs of the computer, the self-test program after startup, and the system self-starting program. Its main function is to provide the computer with the lowest and most direct hardware settings and controls. In the embodiment of the present application, BIOS 30 not only provides the computer with the lowest and most direct hardware settings and controls, but also stores the brightness attenuation coefficient for subsequent reading of EC 20.
  • EC 20 reads the brightness attenuation coefficient stored in BIOS 30.
  • the CPU 10 and the EC 20 will first read some configurations in the BIOS 30, such as the operating speed, etc.
  • the EC 20 when the laptop computer is turned on or restarted, the EC 20 will not only first read some configurations in the BIOS 30, but also read the brightness attenuation coefficient K stored in the BIOS 30.
  • S505 and EC 20 set the I2C register of the backlight chip 112a based on the brightness attenuation coefficient through the I2C bus.
  • FIG6 shows the relationship between the driving current output by the backlight chip to the backlight source and the brightness of the display screen.
  • the horizontal axis is the magnitude of the driving current output by the backlight chip to the backlight source
  • the vertical axis is the magnitude of the brightness of the display screen.
  • the driving current output by the display chip 112a to the backlight source 112b is proportional to the brightness of the display screen 11.
  • the driving current is proportional to the backlight source 112b, that is, the greater the driving current, the greater the brightness. Accordingly, when the brightness of the display screen 11 is at the maximum brightness, the driving current output by the display chip 112a to the backlight source 112b is the maximum current.
  • the I2C register of the backlight chip 112a is set based on the brightness attenuation coefficient, that is, the driving current output from the backlight chip 112a to the backlight source 112b is set to change the driving current output to the backlight source 112b.
  • the driving current after setting is the product of the brightness attenuation coefficient and the driving current before setting.
  • the actual measured maximum brightness is 500nit
  • the typical maximum brightness is 430nit
  • the brightness attenuation coefficient K 430nit/500nit.
  • the driving current before setting is 18mA
  • the maximum brightness of the display screen corresponding to 18mA is 500nit
  • the driving current after setting is the product of 18mA and 430nit/500nit
  • the driving current after setting is 15.48mA.
  • the maximum display brightness of the display screen is 430nit, that is, the driving current is reduced without affecting the display effect, so that the power consumption of electronic equipment can be reduced.
  • the maximum brightness actually measured is 400nit
  • the typical maximum brightness is 430nit
  • the brightness attenuation coefficient K 430nit/400nit.
  • the driving current before setting is 18mA
  • the driving current after setting is the product of 18mA and 430nit/400nit
  • the driving current after setting is 19.35mA. Accordingly, when the driving current is 19.35mA, the maximum display brightness of the display screen is 430nit, so that the display brightness of the display screen meets the expected brightness and ensures the display effect of the display screen.
  • the following is a description of the process of setting the I2C register of the backlight chip based on the brightness attenuation coefficient so that it outputs the corresponding driving current in conjunction with an actual application scenario, and the following scenario does not constitute a limitation on the present application.
  • the application scenario is described using binary as an example.
  • the driving current output by the backlight chip 112a is determined by a coarse adjustment part and a fine adjustment part.
  • the coarse adjustment part corresponds to three bits
  • the fine adjustment part corresponds to twelve bits.
  • Table 1 shows the correspondence between the three bits in the coarse adjustment part and the current value
  • Table 2 shows the correspondence between the twelve bits in the fine adjustment part and the output drive current value.
  • the fine adjustment part needs to adjust the current determined by the coarse adjustment part so that the driving current output by the display chip 112a to the backlight source 112b is the preset current.
  • the fine adjustment part is the binary corresponding to 3685, that is, 011 is used as the value of the coarse adjustment register and written into the backlight chip 112a, and the binary corresponding to 3685 is used as the value of the fine adjustment register and written into the backlight chip 112a.
  • the backlight chip 112a Based on this (3685/4095 and then multiplied by I max ), the backlight chip 112a outputs a current of 18mA to the backlight source 112b to drive the backlight source 112b to light up, thereby realizing the display of the maximum brightness of the display screen.
  • the maximum brightness of the display screen is 500nit, which is greater than the typical maximum brightness of 430nit.
  • the process of setting the I2C register of the backlight chip 112a based on the brightness attenuation coefficient by EC 20 is as follows: first set the three bits of coarse adjustment to 011, at this time the coarse adjustment current Imax corresponding to the coarse adjustment part is 20mA, and 20mA is divided by 18mA to get 1.11. Since the fine adjustment register is twelve bits, it is 4095 bits. Divide 4095 by 1.11 to get 3685, and then multiply 3685 by the brightness attenuation coefficient K (430nit/500nit) to get 3169.
  • the fine adjustment part is the binary corresponding to 3169, that is, 011 is used as the value of the coarse adjustment register and written into the backlight chip 112a, and the binary corresponding to 3169 is used as the value of the fine adjustment register and written into the backlight chip 112a.
  • the backlight chip 112a Based on this (3169/4095 and then multiplied by I max ), the backlight chip 112a outputs a current of 15.48mA to the backlight source 112b to drive the backlight source 112b to light up, thereby realizing the display of the maximum brightness of the display screen.
  • the maximum brightness displayed by the display screen 11 is 430nit, which can reduce power consumption while meeting the maximum brightness and extend the standby time of the electronic device.
  • the maximum brightness of the display screen is first measured, and then the brightness attenuation coefficient is obtained based on the measured maximum brightness and the theoretical maximum brightness (also called the typical maximum brightness), and the brightness attenuation coefficient is written into the BIOS 30.
  • the backlight chip 112a is set based on the brightness attenuation coefficient to change the driving current output by the backlight chip 112a to the backlight source 112b, thereby changing the brightness of the display screen 11, so that the maximum brightness of the high-brightness screen is reduced, and the maximum brightness of the low-brightness screen is increased, so that different The brightness of the display screen is balanced.
  • the power consumption of the electronic device can be reduced and the standby time of the electronic device can be extended; when the maximum brightness of the low-brightness screen is increased alone, the display effect of the electronic device can be improved.
  • the display screen 11 includes, in addition to the display panel 111, the backlight module 112 (including the backlight chip 112a and the backlight source 112b) and the like described above, a storage unit 113 is also included for storing parameters such as the manufacturer information of the display screen and the resolution supported. Unlike the first embodiment, in the embodiment of the present application, the storage unit 113 not only stores the manufacturer information of the display screen, the resolution supported and other parameters, but also stores the maximum brightness or brightness attenuation coefficient of the current display screen. That is to say, before the display screen is supplied, the maximum brightness or brightness attenuation coefficient of the current display screen has been stored in the storage unit 113 as a parameter of the display screen.
  • the brightness attenuation coefficient is stored in the storage unit 113, it is not necessary to measure the maximum brightness of the display screen when it is displayed after the laptop is assembled and before it leaves the factory, and it is not necessary to obtain the brightness attenuation coefficient based on the maximum brightness obtained by measurement and the theoretical maximum brightness.
  • the maximum brightness of the current display screen is stored in the storage unit 113, it is not necessary to measure the maximum brightness of the display screen when it is displayed after the laptop is assembled and before it leaves the factory, and it is only necessary to obtain the brightness attenuation coefficient based on the maximum brightness of the current display screen provided and the theoretical maximum brightness.
  • FIG. 7 shows a flow chart of a display brightness adjustment method provided by the second embodiment of the present application, wherein the brightness attenuation coefficient is stored in the storage unit 113 as an example for explanation.
  • the display brightness adjustment method is introduced below in conjunction with the electronic device shown in FIG. 4 .
  • the display brightness adjustment method can be implemented by the following steps:
  • the CPU 10 reads the brightness attenuation coefficient stored in the storage unit 113.
  • the storage unit 113 is, for example, an extended display identification data table (EDID) in the display screen 11.
  • EDID extended display identification data table
  • the storage unit 113 is not limited thereto, and as long as it can store the brightness attenuation coefficient, it is within the protection scope of the embodiments of the present application.
  • the CPU 10 can parse program instructions, process data, and execute operations, etc.
  • the CPU 10 can not only parse program instructions, process data, and execute operations, but also read the brightness attenuation coefficient stored in the storage unit 113.
  • CPU 10 stores the read brightness attenuation coefficient in BIOS 30.
  • BIOS 30 of the embodiment of the present application also stores the brightness attenuation coefficient for subsequent reading by EC 20.
  • EC 20 reads the brightness attenuation coefficient stored in BIOS 30.
  • the CPU 10 and the EC 20 will first read some configurations in the BIOS 30, such as the operating speed, etc.
  • the EC 20 when the laptop computer is turned on or restarted, the EC 20 will not only first read some configurations in the BIOS 30, but also read the brightness attenuation coefficient stored in the BIOS 30.
  • the specific process of EC setting the I2C register of the backlight chip based on the brightness attenuation coefficient through the I2C bus is the same as that in the first embodiment.
  • the specific process can be found in the corresponding description of the first embodiment, which will not be repeated here.
  • CPU 10 reads the brightness attenuation coefficient stored in the display screen 11, and writes the brightness attenuation coefficient into BIOS 30.
  • EC 20 reads the brightness attenuation coefficient stored in BIOS 30, it sets the backlight chip based on the brightness attenuation coefficient to change the driving current output by the backlight chip 112a to the backlight source 112b, thereby changing the brightness of the display screen 11, so that the maximum brightness of the high-brightness screen is reduced, and the maximum brightness of the low-brightness screen is increased, so that the brightness of different display screens is balanced.
  • the power consumption of the electronic device can be reduced and the standby time of the electronic device can be extended; when the maximum brightness of the low-brightness screen is increased alone, the display effect of the electronic device can be improved.
  • the embodiment of the present application stores the brightness attenuation coefficient read by the CPU 10 in VBIOS 40.
  • VBIOS 40 stores the most important basic input and output programs of the computer graphics card, the graphics card self-test program after power-on, and the graphics card self-start program. It can read and write specific information of the graphics card in the system settings from CMOS. Its main function is to provide the most basic and most direct hardware settings and controls for the graphics card. In the embodiment of the present application, VBIOS 40 not only provides the most basic and most direct hardware settings and controls for the graphics card, but also stores the brightness attenuation coefficient.
  • FIG. 8 shows a flow chart of a display brightness adjustment method provided in Embodiment 3 of the present application, wherein the brightness attenuation coefficient is stored in the storage unit 113 as an example for illustration.
  • the display brightness adjustment method is introduced below in conjunction with the electronic device shown in FIG. 4 .
  • the display brightness adjustment method can be implemented through the following steps:
  • the CPU 10 reads the brightness attenuation coefficient stored in the storage unit 113.
  • the storage unit 113 is, for example, an extended display identification data table (EDID) in the display screen 11.
  • EDID extended display identification data table
  • the storage unit 113 is not limited thereto, and as long as it can store the brightness attenuation coefficient, it is within the protection scope of the embodiments of the present application.
  • the CPU 10 can parse program instructions, process data, and execute operations, etc.
  • the CPU 10 can not only parse program instructions, process data, and execute operations, but also read the brightness attenuation coefficient stored in the storage unit 113.
  • CPU 10 stores the read brightness attenuation coefficient in VBIOS 40.
  • VBIOS 40 not only provides the most basic and direct hardware settings and controls for the graphics card, but also stores the brightness attenuation coefficient.
  • EC 20 reads the brightness attenuation coefficient stored in VBIOS 40.
  • EC 20 will also first read the brightness attenuation coefficient stored in VBIOS 40 when the laptop computer is turned on or restarted.
  • the specific process of EC setting the I2C register of the backlight chip based on the brightness attenuation coefficient through the I2C bus is the same as that in the first embodiment.
  • the specific process can be found in the corresponding description of the first embodiment, which will not be repeated here.
  • CPU 10 reads the brightness attenuation coefficient stored in the display screen 11, and writes the brightness attenuation coefficient into VBIOS 40.
  • EC 20 sets the backlight chip based on the brightness attenuation coefficient to change the driving current output by the backlight chip 112a to the backlight source 112b, thereby changing the brightness of the display screen 11, so that the maximum brightness of the high-brightness screen is reduced, and the maximum brightness of the low-brightness screen is increased, so that the brightness of different display screens is balanced.
  • the power consumption of the electronic device can be reduced and the standby time of the electronic device can be extended; when the maximum brightness of the low-brightness screen is increased alone, the display effect of the electronic device can be improved.
  • the CPU 10 in the embodiment of the present application can not only parse program instructions, process data and execute operations, and read the brightness attenuation coefficient stored in the storage unit 113, but also set the I2C register of the backlight chip based on the brightness attenuation coefficient.
  • Figure 9 shows a flow chart of a display brightness adjustment method provided by the fourth embodiment of the present application.
  • the display brightness adjustment method is introduced below in conjunction with the electronic device shown in Figure 4.
  • the display brightness adjustment method can be implemented by the following steps:
  • the CPU 10 In response to the user's restart operation or the power-off and power-on operation, the CPU 10 reads the brightness attenuation coefficient stored in the storage unit 113.
  • the storage unit 113 is, for example, an extended display identification data table (EDID) in the display screen 11.
  • EDID extended display identification data table
  • the storage unit 113 is not limited thereto, and as long as it can store the brightness attenuation coefficient, it is within the protection scope of the embodiments of the present application.
  • the CPU 10 can parse program instructions, process data, and execute operations, etc.
  • the CPU 10 can not only parse program instructions, process data, and execute operations, but also read the brightness attenuation coefficient stored in the storage unit 113.
  • CPU 10 sets the I2C register of the backlight chip 112a based on the brightness attenuation coefficient.
  • CPU 10 reads the brightness attenuation coefficient stored in storage unit 113, it will not store the brightness attenuation coefficient in BIOS 30 or VBIOS 40 again, but will directly set the I2C register of the backlight chip based on the brightness attenuation coefficient.
  • the specific process of CPU 10 setting the I2C register of the backlight chip based on the brightness attenuation coefficient is similar to the specific process of EC 20 setting the I2C register of the backlight chip based on the brightness attenuation coefficient in Example 1.
  • the process of setting the I2C register of the backlight chip based on the brightness attenuation coefficient can be found in the corresponding description of Example 1 (i.e., the content corresponding to step S505), which will not be repeated here.
  • the CPU 10 reads the brightness attenuation coefficient stored in the display screen 11, and sets the backlight chip based on the brightness attenuation coefficient to change the driving current output by the backlight chip 112a to the backlight source 112b, thereby changing the brightness of the display screen 11, so that the maximum brightness of the high-brightness screen is reduced, and the maximum brightness of the low-brightness screen is increased. High, so that the brightness of different display screens is balanced.
  • the power consumption of the electronic device can be reduced and the standby time of the electronic device can be extended; when the maximum brightness of the low-brightness screen is increased alone, the display effect of the electronic device can be improved, and the steps are simple.
  • This embodiment also provides a computer storage medium, in which computer instructions are stored.
  • the computer instructions are executed on an electronic device, the electronic device executes the above-mentioned related method steps to implement the display screen brightness adjustment method in the above-mentioned embodiment.
  • This embodiment further provides a computer program product.
  • the computer program product When the computer program product is run on a computer, the computer is caused to execute the above-mentioned related steps to implement the display screen brightness adjustment method in the above-mentioned embodiment.
  • an embodiment of the present application also provides a device, which can specifically be a chip, component or module, and the device may include a connected processor and memory; wherein the memory is used to store computer execution instructions, and when the device is running, the processor can execute the computer execution instructions stored in the memory so that the chip executes the display brightness adjustment method in the above-mentioned method embodiments.
  • the electronic device such as a mobile phone, etc.
  • computer storage medium, computer program product or chip provided in this embodiment is used to execute the corresponding method provided above. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding method provided above, and will not be repeated here.
  • the disclosed devices and methods can be implemented in other ways.
  • the device embodiments described above are only schematic, for example, the division of modules or units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed.
  • Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

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Abstract

一种显示屏亮度调节方法，应用于电子设备，电子设备包括显示屏，显示屏亮度调节方法包括：获取显示屏的亮度衰减系数，其中，亮度衰减系数基于显示屏的最大亮度和典型最大亮度确定；基于亮度衰减系数调节显示屏的亮度。显示屏亮度调节方法及电子设备，可以让不同屏幕的亮度均衡，当单独降低高亮屏的最大亮度时，可以达到降低电子设备功耗的效果；当单独提升低亮屏的最大亮度时，可以提升电子设备的显示效果。

Description

显示屏亮度调节方法及电子设备
本申请要求于2022年10月12日提交中国国家知识产权局、申请号为202211250558.6、申请名称为“显示屏亮度调节方法及电子设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及显示技术领域，尤其涉及一种显示屏亮度调节方法及电子设备。
背景技术
随着显示技术的不断发展，越来越多具有显示功能的电子设备被广泛应用于人们的日常生活及工作当中，为人们的日常生活及工作带来了巨大的便利。
电子设备实现显示功能的主要部件是显示屏。然而，显示屏在显示时，其最大亮度与设定的最大亮度之间存在差异。
发明内容
为了解决上述技术问题，本申请提供一种显示屏亮度调节方法及电子设备。可以让不同屏幕的亮度均衡，当单独降低高亮屏的最大亮度时，可以达到降低电子设备功耗的问题；当单独提升低亮屏的最大亮度时，可以提升电子设备的显示效果。
第一方面，本申请实施例提供一种显示屏亮度调节方法，应用于电子设备，电子设备包括显示屏，显示屏亮度调节方法包括：获取显示屏的亮度衰减系数，其中，亮度衰减系数基于显示屏的最大亮度和典型最大亮度确定；基于亮度衰减系数调节显示屏的亮度。
基于待检测显示屏的最大亮度和典型最大亮度确定亮度衰减系数，后续显示屏在显示时，基于该亮度衰减系数调节显示屏的显示亮度，这样一来，使得高亮屏的最大亮度降低，低亮屏的最大亮度升高，使得不同显示屏的亮度均衡，当单独降低高亮屏的最大亮度(相应的驱动LED灯发光的电流减小)时，可以达到降低电子设备功耗的效果；当单独提升低亮屏的最大亮度时，可以提升电子设备的显示效果。
示例性的，显示屏的最大亮度为：调节前，在预设电压和预设电流的驱动下，显示屏进行显示时，实际测量得到的最大亮度。典型最大亮度为：在预设电压和预设电流的驱动下，显示屏进行显示时，理论达到的最大亮度。
示例性的，基于亮度衰减系数调节显示屏的亮度，使得调节后的显示屏的最大亮度与典型最大亮度的差值在预设差值范围内，其中，该预设差值范围例如可以为零，即，使得调节后的显示屏的最大亮度与典型最大亮度的差值为零。当然，调节后的显示屏的最大亮度与典型最大亮度的差值并不限于零，调节后的显示屏的最大亮度与典型最大亮度的差值只要小于调节前的显示屏的最大亮度与典型最大亮度的差值即可。
根据第一方面，亮度衰减系数为典型最大亮度与调节前显示屏的最大亮度的比值；调节后的显示屏的最大亮度L1与调节前显示屏的最大亮度L2满足：L1＝L2*K；其中，K为亮度衰减系数。这样，可以使得调节后的显示屏的最大亮度与典型最大亮度的差值最小，即调节后的显示屏的最大亮度接近典型最大亮度，或与典型最大亮度相同，当单独降低高亮屏的最大亮度(相应的驱动LED灯发光的电流减小)时，降低电子设备功耗的同时还可以保证较好的效果；当单独提升低亮屏的最大亮度时，进一步提升电子设备的显示效果。
根据第一方面，或者以上第一方面的任意一种实现方式，基于亮度衰减系数调节显示屏的亮度，包括：基于亮度衰减系数调节驱动显示屏进行显示的驱动电流。方式简单，其运算简单。
根据第一方面，或者以上第一方面的任意一种实现方式，显示屏包括液晶显示屏；液晶显示屏包括显示面板和背光模组，背光模组包括背光芯片和背光源；基于亮度衰减系数调节驱动显示屏进行显示的驱动电流，包括：基于亮度衰减系数调节背光芯片输出至背光源电流，该电流可以驱动背光源发光。当然，显示屏并不限于液晶显示屏，任何显示屏采用本方案均可以达到接近典型最大亮度的目的。可以理解的是，当显示屏为其他类型的显示屏时，可以通过改变其他相对应的参数，使得显示时的最大亮度接近或等于典型最大亮度。
根据第一方面，或者以上第一方面的任意一种实现方式，第一驱动电流由粗调电流部分和细调电流部分确定，其中，第一驱动电流为调节前显示屏的最大亮度对应的驱动电流；基于亮度衰减系数调节驱动显示屏进行显示的驱动电流，包括：粗调电流部分不变，基于亮度衰减系数调节细调电流部分，以形成第二驱动电流，其中，第二驱动电流为调节后显示屏的最大亮度对应的驱动电流，调节方式简单，提升电子设备的运算速率。
根据第一方面，或者以上第一方面的任意一种实现方式，当亮度衰减系数为典型最大亮度和调节前显示屏的最大亮度的比值时，调节后的细调电流部分A1与调节前的细调电流部分A2满足：A1＝A2*K。这样，可以使得调节后的显示屏的最大亮度与典型最大亮度的差值最小，即调节后的显示屏的最大亮度接近典型最大亮度，或与典型最大亮度相同，当单独降低高亮屏的最大亮度(相应的驱动LED灯发光的电流减小)时，降低电子设备功耗的同时还可以保证较好的效果；当单独提升低亮屏的最大亮度时，进一步提升电子设备的显示效果。
根据第一方面，或者以上第一方面的任意一种实现方式，典型最大亮度为430nit。该亮度具有较好的显示效果，提升用户的使用体验。当然，典型最大亮度并不限于此， 本领域技术人员可以根据实际情况选择。
第二方面，本申请实施例提供一种电子设备，该电子设备包括：显示屏；电子设备还包括：存储单元，用于存储亮度衰减系数，其中，亮度衰减系数基于显示屏的最大亮度和典型最大亮度确定；获取模块，用于获取亮度衰减系数；调节模块，用于根据亮度衰减系数调节显示屏的亮度。
基于待检测显示屏的最大亮度和典型最大亮度确定亮度衰减系数，后续显示屏在显示时，基于该亮度衰减系数调节显示屏的显示亮度，这样一来，使得高亮屏的最大亮度降低，低亮屏的最大亮度升高，使得不同显示屏的亮度均衡，当单独降低高亮屏的最大亮度(相应的驱动LED灯发光的电流减小)时，可以达到降低电子设备功耗的效果；当单独提升低亮屏的最大亮度时，可以提升电子设备的显示效果。
示例性的，显示屏的最大亮度为：调节前，在预设电压和预设电流的驱动下，显示屏进行显示时，实际测量得到的最大亮度。典型最大亮度为：在预设电压和预设电流的驱动下，显示屏进行显示时，理论达到的最大亮度。
示例性的，基于亮度衰减系数调节显示屏的亮度，使得调节后的显示屏的最大亮度与典型最大亮度的差值在预设差值范围内，其中，该预设差值范围例如可以为零，即，使得调节后的显示屏的最大亮度与典型最大亮度的差值为零。当然，调节后的显示屏的最大亮度与典型最大亮度的差值并不限于零，调节后的显示屏的最大亮度与典型最大亮度的差值只要小于调节前的显示屏的最大亮度与典型最大亮度的差值即可。
根据第二方面，电子设备还包括基本输入输出系统和嵌入式控制器，嵌入式控制器与基本输入输出系统电连接；基本输入输出系统复用为存储单元，用于存储亮度衰减系数；嵌入式控制器复用为获取模块和调节模块，用于获取亮度衰减系数，并根据亮度衰减系数调节显示屏的亮度。
通过电子设备已有的基本输入输出系统和嵌入式控制器来实现显示屏亮度的调节，无需单独设置，节省成本，节省电子设备内部的空间，有利于电子设备内其他结构的设置。
根据第二方面，或者以上第二方面的任意一种实现方式，电子设备还包括处理器，与显示屏电连接；显示屏包括存储单元，存储单元内存储有亮度衰减系数；处理器，用于获取存储单元内存储的亮度衰减系数，并将亮度衰减系数发送至基本输入输出系统，以使基本输入输出系统对亮度衰减系数进行存储。
通过电子设备已有的处理器、基本输入输出系统和存储单元来实现显示屏亮度的调节，无需单独设置，节省成本，节省电子设备内部的空间，有利于电子设备内其他结构的设置。
根据第二方面，或者以上第二方面的任意一种实现方式，电子设备包括处理器、显卡基本输入输出系统和嵌入式控制器；显示屏包括存储单元，存储单元内存储有亮度衰 减系数；处理器分别与显示屏和显卡基本输入输出系统电连接，用于获取存储单元内存储的亮度衰减系数，并将亮度衰减系数发送至显卡基本输入输出系统，以使显卡基本输入输出系统对亮度衰减系数进行存储；嵌入式控制器复用为获取模块和调节模块，与显卡基本输入输出系统电连接，用于获取显卡基本输入输出系统内存储的亮度衰减系数，并根据亮度衰减系数调节显示屏的亮度。
通过电子设备已有的处理器、显卡基本输入输出系统、嵌入式控制器和存储单元来实现显示屏亮度的调节，无需单独设置，节省成本，节省电子设备内部的空间，有利于电子设备内其他结构的设置。
根据第二方面，或者以上第二方面的任意一种实现方式，显示屏包括存储单元；电子设备还包括处理器，与显示屏电连接；处理器复用为获取模块和调节模块；处理器，用于获取亮度衰减系数，并根据亮度衰减系数调节显示屏的亮度。
通过电子设备已有的处理器和存储单元来实现显示屏亮度的调节，无需单独设置，节省成本，节省电子设备内部的空间，有利于电子设备内其他结构的设置。
根据第二方面，或者以上第二方面的任意一种实现方式，亮度衰减系数为典型最大亮度和调节前显示屏的最大亮度的比值；调节后的显示屏的最大亮度L1与调节前显示屏的最大亮度L2满足：L1＝L2*K；其中，K为亮度衰减系数。这样，可以使得调节后的显示屏的最大亮度与典型最大亮度的差值最小，即调节后的显示屏的最大亮度接近典型最大亮度，或与典型最大亮度相同，当单独降低高亮屏的最大亮度(相应的驱动LED灯发光的电流减小)时，降低电子设备功耗的同时还可以保证较好的效果；当单独提升低亮屏的最大亮度时，进一步提升电子设备的显示效果。
根据第二方面，或者以上第二方面的任意一种实现方式，调节模块，具体用于根据亮度衰减系数调节驱动显示屏进行显示的驱动电流。方式简单，其运算简单。
根据第二方面，或者以上第二方面的任意一种实现方式，显示屏包括液晶显示屏；液晶显示屏包括显示面板和背光模组，背光模组包括背光芯片和背光源；背光芯片分别与背光源和调节模块电连接；调节模块，用于根据亮度衰减系数调节背光芯片输出至背光源的电流，该电流可以驱动背光源发光。当然，显示屏并不限于液晶显示屏，任何显示屏采用本方案均可以达到接近典型最大亮度的目的。可以理解的是，当显示屏为其他类型的显示屏时，可以通过改变其他相对应的参数，使得显示时的最大亮度接近或等于典型最大亮度。
根据第二方面，或者以上第二方面的任意一种实现方式，第一驱动电流由粗调电流部分和细调电流部分确定，其中，第一驱动电流为调节前显示屏的最大亮度对应的驱动电流；调节模块，具体用于根据亮度衰减系数调节细调电流部分，以形成第二驱动电流，其中，粗调电流部分不变，第二驱动电流为调节后显示屏的最大亮度对应的电流， 调节方式简单，提升电子设备的运算速率。
根据第二方面，或者以上第二方面的任意一种实现方式，亮度衰减系数为典型最大亮度和调节前显示屏的最大亮度的比值；调节后的细调电流部分A1与调节前的细调电流部分A2满足：A1＝A2*K；其中，K为亮度衰减系数。这样，可以使得调节后的显示屏的最大亮度与典型最大亮度的差值最小，即调节后的显示屏的最大亮度接近典型最大亮度，或与典型最大亮度相同，当单独降低高亮屏的最大亮度(相应的驱动LED灯发光的电流减小)时，降低电子设备功耗的同时还可以保证较好的效果；当单独提升低亮屏的最大亮度时，进一步提升电子设备的显示效果。
根据第二方面，或者以上第二方面的任意一种实现方式，典型最大亮度为430nit。该亮度具有较好的显示效果，提升用户的使用体验。当然，典型最大亮度并不限于此，本领域技术人员可以根据实际情况选择。
根据第二方面，或者以上第二方面的任意一种实现方式，电子设备包括笔记本电脑等，只要可以进行显示的电子设备均在本申请实施例的保护范围内，该电子设备具有待机时间长或显示效果好的特点。
第三方面，本申请实施例提供一种计算机可读存储介质。该计算机可读存储介质包括计算机程序，当计算机程序在电子设备上运行时，使得电子设备执行第一方面以及第一方面中任意一项的显示屏亮度调节方法。
第三方面以及第三方面的任意一种实现方式分别与第一方面以及第一方面的任意一种实现方式相对应。第三方面以及第三方面的任意一种实现方式所对应的技术效果可参见上述第一方面以及第一方面的任意一种实现方式所对应的技术效果，此处不再赘述。
第四方面，本申请实施例提供一种计算机程序产品，包括计算机程序，当计算机程序被运行时，使得计算机执行如第一方面或第一方面中任意一项的显示屏亮度调节方法。
第四方面以及第四方面的任意一种实现方式分别与第一方面以及第一方面的任意一种实现方式相对应。第四方面以及第四方面的任意一种实现方式所对应的技术效果可参见上述第一方面以及第一方面的任意一种实现方式所对应的技术效果，此处不再赘述。
第五方面，本申请提供了一种芯片，该芯片包括处理电路、收发管脚。其中，该收发管脚和该处理电路通过内部连接通路互相通信，该处理电路执行如第一方面或第一方面中任意一项的显示屏亮度调节方法，以控制接收管脚接收信号，以控制发送管脚发送信号。
第五方面以及第五方面的任意一种实现方式分别与第一方面以及第一方面的任意一种实现方式相对应。第五方面以及第五方面的任意一种实现方式所对应的技术效果可参 见上述第一方面以及第一方面的任意一种实现方式所对应的技术效果，此处不再赘述。
附图说明
图1示出了本申请实施例提供的一种电子设备的测试场景图；
图2示出了本申请实施例提供的一种液晶显示屏的结构示意图；
图3示出了本申请实施例提供的背光芯片驱动背光源点亮的原理图；
图4示出了本申请实施例提供的一种电子设备的电路结构示意图；
图5示出了本申请实施例一提供的一种显示屏亮度调节方法的流程图；
图6示出了本申请实施例提供的背光芯片输出至背光源的驱动电流与显示屏的亮度的关系图；
图7示出了本申请实施例二提供的一种显示屏亮度调节方法的流程图；
图8示出了本申请实施例三提供的一种显示屏亮度调节方法的流程图；
图9示出了本申请实施例四提供的一种显示屏亮度调节方法的流程图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。
本申请实施例的说明书和权利要求书中的术语“第一”和“第二”等是用于区别不同的对象，而不是用于描述对象的特定顺序。例如，第一目标对象和第二目标对象等是用于区别不同的目标对象，而不是用于描述目标对象的特定顺序。
在本申请实施例中，“示例性的”或者“例如”等词用于表示作例子、例证或说明。本申请实施例中被描述为“示例性的”或者“例如”的任何实施例或设计方案不应被解释为比其它实施例或设计方案更优选或更具优势。确切而言，使用“示例性的”或者“例如”等词旨在以具体方式呈现相关概念。
在本申请实施例的描述中，除非另有说明，“多个”的含义是指两个或两个以上。例如，多个处理单元是指两个或两个以上的处理单元；多个系统是指两个或两个以上的系统。
图1示例性的示出了一种测试场景，在本测试场景中以电子设备为笔记本电脑为例进行解释说明。笔记本电脑100的显示屏11在出厂前会进行显示时的最大亮度的测量，经过测量发现，在相同的电流和电压的驱动下，第一待检测显示屏和第二待测显示屏显示时的最大亮度不同。如图1(1)所示，在预设电流和预设电压的驱动下，第一待检测显示屏11a的最大亮度例如为430nit，其中，430nit例如为典型最大亮度，所谓典型最大亮度即为在预设电流和预设电压的驱动下，显示屏理论达到的最大亮度。然而， 在预设电流和预设电压的驱动下，第二待检测显示屏11b的最大亮度为500nit，大于典型最大亮度。也就是说，两个显示屏消耗的电都是一样的，但是屏幕亮度不同，且高亮显示屏(即第二待检测显示屏11b)比典型显示屏(第一待检测显示屏11a)要亮的多。
具体分析如下，需要说明的是，下述分析和下述实施例均以显示屏11为液晶显示(Liquid Crystal Display，LCD)屏为例进行的说明，可以理解的是，显示屏11包括但不限于LCD屏，例如还可以包括有机发光二极管(Organic Light Emitting Diode，OLED)显示屏和LED显示屏等，其中，LED显示屏例如包括Micro-LED显示屏、Mini-LED显示屏等，本申请实施例对显示屏11的类型不进行限定。
参见图2，图2示出了本申请实施例提供的一种液晶显示屏的结构示意图。如图2所示，LCD显示屏包括显示面板111和背光模组112。背光模组112包括背光芯片112a、背光源112b和导光板112c等结构。背光芯片112a驱动背光源112b点亮，背光源112b点亮时产生的光线例如从导光板112c的侧面射入，经过导光板112c的匀光后从导光板112c的出光面射出至显示面板111，以使显示面板111显示。
此处需要说明的是，图2是以背光源112b为侧入式光源为例进行的说明，但不构成对本申请的限定，在其他可选实施例中，背光源112b还可以为直下式光源。
示例性的，结合图3，图3示出了本申请实施例提供的背光芯片驱动背光源点亮的原理图。如图3所示，背光源112b包括并联的六组LED灯组，即六个背光通道，每组LED灯组包括十一颗LED灯。若所需的显示屏11显示时的最大亮度为典型最大亮度(即430nit)，则背光芯片112a需要为每个背光通道提供33V的电压和20mA的电流，六个通道则需要提供33V的电压和120mA的电流。
经过研究发现，多个待检测显示屏在出厂前进行最大亮度测量时，在相同的电流和电压(如33V的电压和120mA的电流)的驱动下，不同的待检测显示屏，其最大亮度之间存在差异，即多个待检测显示屏消耗的电都是一样的，但是屏幕亮度不同，可能比典型最大亮度大，可能比典型最大亮度小，可能与典型最大亮度相同。
鉴于此，本申请实施例提供一种显示屏亮度调节方法和电子设备，基于待检测显示屏的最大亮度和典型最大亮度确定亮度衰减系数，后续显示屏在显示时，基于该亮度衰减系数调节显示屏的显示亮度，这样一来，使得高亮屏的最大亮度降低，低亮屏的最大亮度升高，使得不同显示屏的亮度均衡，当单独降低高亮屏的最大亮度(相应的驱动LED灯发光的电流减小)时，可以达到降低电子设备功耗的效果；当单独提升低亮屏的最大亮度时，可以提升电子设备的显示效果。
本申请实施例提供的电子设备可以是笔记本电脑、手机、台式电脑、平板电脑、个人数字助理(personal digital assistant，简称PDA)、车载电脑、电视、智能穿戴式设备、智能家居设备等包括显示屏的智能终端，本申请实施例对上述电子设备的具体形式不作特殊限定。
下面对本申请实施例提供的显示屏亮度调节方法和电子设备进行说明，其中，以电子设备是笔记本电脑为例进行说明。
实施例一
参见图4，图4示出了本申请实施例提供的一种电子设备的电路结构示意图。如图4所示，笔记本电脑100包括显示屏11、中央处理器(central processing unit，CPU)10、嵌入式控制器(Embed Controller，EC)20、基本输入输出系统(Basic Input Output System，BIOS)30、显卡基本输入输出系统(VIDEO Basic Input Output System，VBIOS)40等，本领域技术人员可以理解的是，图4所示的电子设备仅为本申请实施例提供的一个示例，图4中示出的电子设备的结构并不构成对电子设备的限定，电子设备可以包括比图示更多或更少的部件，或者组合某些部件，或者拆分某些部件，或者不同的部件布置。
其中，CPU 10是一块超大规模的集成电路，是电子设备的运算核心(core)和控制核心(control unit)。处理器可以解析程序指令，处理数据和执行操作等。EC 20在电子设备处于关机和开机状态下均可运行，其主要控制上电时序、键盘和处理底层硬件相关工作，比如温度检测、充电控制等的功能。此处的关机代表的含义是该电子设备的一些功耗高的器件(如CPU等)断电，但EC 20仍然保持上电从而可以继续工作。BIOS 30是笔记本电脑启动时加载的第一个软件，它保存这计算机最重要的基本输入输出的程序、开机后自检程序和系统自启动程序，其主要功能是为计算机提供最底层的、最直接的硬件设置和控制。VBIOS 40保存着计算机显卡最重要的基本输入输出的程序、开机后显卡自检程序和显卡自启动程序，它可从CMOS中读写系统设置中显卡的具体信息，其主要功能是为显卡提供最底层的、最直接的硬件设置和控制。显示屏11除了包括上述所述的显示面板111、背光模组112(包括背光芯片112a和背光源112b)等，还包括存储单元113，用于存储显示屏的厂家信息、所支持的分辨率等参数。
参见图5，图5示出了本申请实施例一提供的一种显示屏亮度调节方法的流程图。下面结合图4所示的电子设备对显示屏亮度调节方法进行介绍。
如图5所示，显示屏亮度调节方法可通过如下步骤实现：
S501、在笔记本电脑组装完成后，且出厂前，测量其显示屏显示时的最大亮度。
其中，在笔记本电脑组装完成后，且出厂前，控制背光芯片112a为每个背光通道提供预设电压和预设电流(如33V的电压和20mA的电流)，以使显示屏11进行显示，且此时显示屏11显示的亮度为最大亮度。然后，例如可以采用亮度计测量此时显示屏的最大亮度。
示例性的，例如可以采用九点法得到最大亮度。具体的，将显示屏均分成九个区域，通过亮度计在每个区域的中心位置测量该区域的最大亮度，对九个区域的最大亮度取平均值即可确定显示屏显示时的最大亮度。
需要说明的是，测量显示屏的最大亮度的方式并不限于采用亮度计，还可以采用其他设备或方法，只要可以测量出最大亮度即可。此外，采用九点法得到显示屏的最大亮度仅为本申请的一个示例，但不构成对本申请的限定，例如还可以采用八十一点法得到最大亮度，其中，八十一点法具体为，将显示屏均分成八十一个区域，通过亮度计在每个区域的中心位置测量该区域的最大亮度，对八十一个区域的最大亮度取平均值即可确定显示屏显示时的最大亮度。
S502、基于测量得到的最大亮度和典型最大亮度确定亮度衰减系数。
其中，测量得到的最大亮度为：背光芯片112a为每个背光通道提供预设电压和预设电流(如33V的电压和20mA的电流)，以使显示屏11进行显示时，实际测量得到的最大亮度。典型最大亮度为：背光芯片112a为每个背光通道提供预设电压和预设电流(如33V的电压和20mA的电流)，以使显示屏11进行显示时，理论达到的最大亮度。
当实际测量得到的最大亮度大于典型最大亮度时，表明该显示屏在预设电压和预设电流驱动下，最大亮度要亮，这样会导致电量的浪费，即，需要的是典型最大亮度，但是实际得到的却是较大的亮度，而该亮度并不会对显示效果带来益处。
当实际测量得到的最大亮度小于典型最大亮度时，表明该显示屏在预设电压和预设电流驱动下，最大亮度要暗，这样会导致显示效果不佳，即需要的是典型最大亮度，但是实际得到的却是较小的亮度，较小的亮度影响显示效果。
因此，可以基于测量得到的最大亮度和典型最大亮度确定亮度衰减系数，后续显示屏在显示时，可以基于该亮度衰减系数调节显示屏的显示亮度，这样一来，使得高亮屏的最大亮度降低，低亮屏的最大亮度升高，使得不同显示屏的亮度均衡，当单独降低高亮屏的最大亮度(相应的驱动LED灯发光的电流减小)时，可以达到降低电子设备功耗的问题；当单独提升低亮屏的最大亮度时，可以提升电子设备的显示效果，其中，具体调节方法在下述步骤中进行介绍。
本申请实施例中，亮度衰减系数例如为典型最大亮度和调节前显示屏的最大亮度的比值。示例性的，实际测量得到的最大亮度为500nit，典型最大亮度为430nit，则亮度衰减系数K＝430nit/500nit。再示例性的，实际测量得到的最大亮度为400nit，典型最大亮度为430nit，则亮度衰减系数K＝430nit/400nit。
S503、将亮度衰减系数存储于BIOS 30中。
由前述内容可知，BIOS 30是笔记本电脑启动时加载的第一个软件，它保存这计算机最重要的基本输入输出的程序、开机后自检程序和系统自启动程序，其主要功能是为计算机提供最底层的、最直接的硬件设置和控制。本申请实施例中，BIOS 30不仅为计算机提供最底层的、最直接的硬件设置和控制等，还存储有亮度衰减系数，以便后续EC 20的读取。
S504、响应于用户的重启操作或关机后再开机操作，EC 20读取存储于BIOS 30的亮度衰减系数。
由本领域技术人员可知，CPU 10和EC 20等在笔记本电脑开机时，会先读取BIOS30内的一些配置，如运行速率等。本申请实施例中，EC 20在笔记本电脑开机或重启时，不仅会先读取BIOS 30内的一些配置，同时还会读取BIOS 30存储的亮度衰减系数K。
S505、EC 20通过I2C总线，基于亮度衰减系数对背光芯片112a的I2C寄存器做设定。
结合图6，图6示出了背光芯片输出至背光源的驱动电流与显示屏的亮度的关系。图6中，横坐标为背光芯片输出至背光源的驱动电流的大小，纵坐标为显示屏的亮度的大小，由图6可知，显示芯片112a输出至背光源112b的驱动电流与显示屏11的亮度成 正比关系，即驱动电流越大，亮度越大。相应的，当显示屏11的亮度为最大亮度时，显示芯片112a输出至背光源112b的驱动电流则为最大电流。
基于亮度衰减系数对背光芯片112a的I2C寄存器做设定，即为对背光芯片112a输出至背光源112b的驱动电流做设定，以改变输出至背光源112b的驱动电流。
具体的，当亮度衰减系数为典型最大亮度和调节前显示屏的最大亮度的比值时，则设定之后的驱动电流为亮度衰减系数和设定之前的驱动电流的乘积。
仍以前述示例为例进行说明，实际测量得到的最大亮度为500nit，典型最大亮度为430nit，则亮度衰减系数K＝430nit/500nit。假设设定之前的驱动电流为18mA，其中，18mA对应的显示屏的最大亮度为500nit，则设定之后的驱动电流为18mA与430nit/500nit的乘积，设定之后的驱动电流为15.48mA，相应的，当驱动电流为15.48mA时，显示屏的最大显示亮度为430nit，即在不影响显示效果的前提下，降低了驱动电流，这样一来，可以达到降低电子设备功耗的效果。
再示例性的，实际测量得到的最大亮度为400nit，典型最大亮度为430nit，则亮度衰减系数K＝430nit/400nit。假设设定之前的驱动电流为18mA，其中，18mA对应的显示屏的最大亮度为400nit，则设定之后的驱动电流为18mA与430nit/400nit的乘积，设定之后的驱动电流为19.35mA，相应的，当驱动电流为19.35mA时，显示屏的最大显示亮度为430nit，使得显示屏的显示亮度满足预期的亮度，保证显示屏的显示效果。
下面结合一种实际的应用场景对上述基于亮度衰减系数对背光芯片的I2C寄存器做设定，以使其输出相应的驱动电流的过程进行说明，下述场景不构成对本申请的限定。其中，该应用场景是以二进制为例进行的说明。
背光芯片112a输出的驱动电流由粗调部分和细调部分决定，粗调部分对应三个比特(bit)，细调部分对应十二个比特(bit)。
表1为粗调部分中三个比特和电流值的对应关系，表2为细调部分中十二个比特和输出的驱动电流值的对应关系。
通过表1可知，粗调部分相邻的两个电流之间的差值较大。为了得到预设的驱动电流值，则需要细调部分对粗调部分确定的电流做调整，使得显示芯片112a输出至背光源112b的驱动电流为预设电流。
在此前提下，为了更好的理解，下面先对现有的EC 20对背光芯片112a的I2C寄存器做设定的过程进行示例性说明。
假设需要背光芯片112a输出的驱动电流为18mA，其中，18mA对应的显示屏的最大亮度为500nit，则EC 20对背光芯片的I2C寄存器做设定的具体过程为：先设定粗调的三个比特为011，此时粗调部分对应的粗调电流Imax＝20mA，将20mA除以18mA得到1.11。由于细调寄存器是十二个比特，所以是4095位，将4095除以1.11得到3685，则细调部分为3685对应的二进制，即将011作为粗调寄存器的值，写入到背光芯片112a内，将3685对应的二进制作为细调寄存器的值，写入到背光芯片112a内，背光芯片112a基于此(3685/4095然后乘以Imax)输出18mA的电流，至背光源112b，以驱动背光源112b点亮，进而实现显示屏最大亮度的显示，且此时显示屏的最大亮度为500nit，大于典型最大亮度430nit。
本申请实施例中，EC 20基于亮度衰减系数对背光芯片112a的I2C寄存器做设定的过程如下：先设定粗调的三个比特为011，此时粗调部分对应的粗调电流Imax＝20mA，将20mA除以18mA得到1.11。由于细调寄存器是十二个比特，所以是4095位，将4095除以1.11得到3685，然后将3685乘以亮度衰减系数K(430nit/500nit)得到3169，则细调部分为3169对应的二进制，即将011作为粗调寄存器的值，写入到背光芯片112a内，将3169对应的二进制作为细调寄存器的值，写入到背光芯片112a内，背光芯片112a基于此(3169/4095然后乘以Imax)输出15.48mA的电流，至背光源112b，以驱动背光源112b点亮，进而实现显示屏最大亮度的显示，且此时显示屏11显示的最大亮度为430nit，在满足最大亮度的同时还可以降低功耗，延长电子设备的待机时长。
表1粗调部分中三个比特和电流值的对应关系
表2细调部分中十二个比特和输出的驱动电流值的对应关系
综上，本申请实施例中，先测量得到显示屏的最大亮度，然后基于测量得到的最大亮度和理论最大亮度(也称为典型最大亮度)得到亮度衰减系数，并将该亮度衰减系数写入到BIOS 30，EC 20读取存储于BIOS 30的亮度衰减系数后，基于该亮度衰减系数对背光芯片112a做设定，以改变背光芯片112a输出至背光源112b的驱动电流，进而改变显示屏11的亮度，使得高亮屏的最大亮度降低，低亮屏的最大亮度升高，使得不同 显示屏的亮度均衡，当单独降低高亮屏的最大亮度(相应的驱动LED灯发光的电流减小)时，可以达到降低电子设备功耗的问题，延长电子设备的待机时长；当单独提升低亮屏的最大亮度时，可以提升电子设备的显示效果。
实施例二
由实施例一可知，显示屏11除了包括上述所述的显示面板111、背光模组112(包括背光芯片112a和背光源112b)等，还包括存储单元113，用于存储显示屏的厂家信息、所支持的分辨率等参数。与实施例一不同的是，本申请实施例中，存储单元113不仅存储显示屏的厂家信息、所支持的分辨率等参数，还存储有当前显示屏的最大亮度或亮度衰减系数。也就是说，显示屏来料之前，当前显示屏的最大亮度或亮度衰减系数已经作为显示屏的参数存储在存储单元113内。当存储单元113内存储的是亮度衰减系数，则无需在笔记本电脑组装完成后，且出厂前，对显示屏显示时的最大亮度进行测量，且也无需基于测量得到最大亮度与理论最大亮度得到亮度衰减系数。当存储单元113内存储的是当前显示屏的最大亮度，则无需在笔记本电脑组装完成后，且出厂前，对显示屏显示时的最大亮度进行测量，只需基于提供的当前显示屏的最大亮度与理论最大亮度得到亮度衰减系数即可。
基于此，本申请实施例二提供一种显示屏亮度调节方法。参见图7，图7示出了本申请实施例二提供的一种显示屏亮度调节方法的流程图，其中，以存储单元113内存储有亮度衰减系数为例进行说明。下面结合图4所示的电子设备对显示屏亮度调节方法进行介绍。
如图7所示，显示屏亮度调节方法可通过如下步骤实现：
S701、响应于用户的重启操作或关机后再开机操作，CPU 10读取存储于存储单元113的亮度衰减系数。
示例性的，存储单元113例如为显示屏11内的扩展显示标识数据表(Extended Display Identification Data，EDID)，当然，存储单元113并不限于此，只要可以存储亮度衰减系数均在本申请实施例的保护范围内。
由前述内容可知，CPU 10可以解析程序指令，处理数据和执行操作等。本申请实施例中，CPU 10不仅可以解析程序指令，处理数据和执行操作等，还可以读取存储于存储单元113的亮度衰减系数。
S702、CPU 10将读取到的亮度衰减系数存储于BIOS 30中。
也就是说，本申请实施例的BIOS 30也存储有亮度衰减系数，以便后续EC 20的读取。
S703、EC 20读取存储于BIOS 30的亮度衰减系数。
由本领域技术人员可知，CPU 10和EC 20等在笔记本电脑开机时，会先读取BIOS30内的一些配置，如运行速率等。本申请实施例中，EC 20在笔记本电脑开机或重启时，不仅会先读取BIOS 30内的一些配置，同时还会读取BIOS 30存储的亮度衰减系数。
S704、EC 20通过I2C总线，基于亮度衰减系数对背光芯片112a的I2C寄存器做设 定。
其中，EC通过I2C总线，基于亮度衰减系数对背光芯片的I2C寄存器做设定的具体过程与实施例一相同，具体过程可以参见实施例一对应的描述，此处不再赘述。
综上，本申请实施例中，CPU 10读取存储于显示屏11内的亮度衰减系数，并将该亮度衰减系数写入到BIOS 30，EC 20读取存储于BIOS 30的亮度衰减系数后，基于该亮度衰减系数对背光芯片做设定，以改变背光芯片112a输出至背光源112b的驱动电流，进而改变显示屏11的亮度，使得高亮屏的最大亮度降低，低亮屏的最大亮度升高，使得不同显示屏的亮度均衡，当单独降低高亮屏的最大亮度(相应的驱动LED灯发光的电流减小)时，可以达到降低电子设备功耗的问题，延长电子设备的待机时长；当单独提升低亮屏的最大亮度时，可以提升电子设备的显示效果。
实施例三
与实施例二不同的是，本申请实施例将CPU 10读取到亮度衰减系数存储于VBIOS40。由实施例一可知，VBIOS 40保存着计算机显卡最重要的基本输入输出的程序、开机后显卡自检程序和显卡自启动程序，它可从CMOS中读写系统设置中显卡的具体信息，其主要功能是为显卡提供最底层的、最直接的硬件设置和控制。本申请实施例中，VBIOS 40不仅为显卡提供最底层的、最直接的硬件设置和控制等，还存储有亮度衰减系数。
基于此，本申请实施例三提供一种显示屏亮度调节方法。参见图8，图8示出了本申请实施例三提供的一种显示屏亮度调节方法的流程图，其中，以存储单元113内存储有亮度衰减系数为例进行说明。下面结合图4所示的电子设备对显示屏亮度调节方法进行介绍。
如图8所示，显示屏亮度调节方法可通过如下步骤实现：
S801、响应于用户的重启操作或关机后再开机操作，CPU 10读取存储于存储单元113的亮度衰减系数。
示例性的，存储单元113例如为显示屏11内的扩展显示标识数据表(Extended Display Identification Data，EDID)，当然，存储单元113并不限于此，只要可以存储亮度衰减系数均在本申请实施例的保护范围内。
由前述内容可知，CPU 10可以解析程序指令，处理数据和执行操作等。本申请实施例中，CPU 10不仅可以解析程序指令，处理数据和执行操作等，还可以读取存储于存储单元113的亮度衰减系数。
S802、CPU 10将读取到的亮度衰减系数存储于VBIOS 40中。
也就是说，本申请实施例中，VBIOS 40不仅为显卡提供最底层的、最直接的硬件设置和控制等，还存储有亮度衰减系数。
S803、EC 20读取存储于VBIOS 40的亮度衰减系数。
本申请实施例中，EC 20在笔记本电脑开机或重启时，也会先读取VBIOS 40内存储的亮度衰减系数。
S804、EC 20通过I2C总线，基于亮度衰减系数对背光芯片112a的I2C寄存器做设 定。
其中，EC通过I2C总线，基于亮度衰减系数对背光芯片的I2C寄存器做设定的具体过程与实施例一相同，具体过程可以参见实施例一对应的描述，此处不再赘述。
综上，本申请实施例中，CPU 10读取存储于显示屏11内的亮度衰减系数，并将该亮度衰减系数写入到VBIOS 40，EC 20读取存储于VBIOS 40的亮度衰减系数后，基于该亮度衰减系数对背光芯片做设定，以改变背光芯片112a输出至背光源112b的驱动电流，进而改变显示屏11的亮度，使得高亮屏的最大亮度降低，低亮屏的最大亮度升高，使得不同显示屏的亮度均衡，当单独降低高亮屏的最大亮度(相应的驱动LED灯发光的电流减小)时，可以达到降低电子设备功耗的问题，延长电子设备的待机时长；当单独提升低亮屏的最大亮度时，可以提升电子设备的显示效果。
实施例四
与实施例三不同的是，本申请实施例中的CPU 10不仅可以解析程序指令，处理数据和执行操作，以及读取存储于存储单元113的亮度衰减系数，还可以基于亮度衰减系数对背光芯片的I2C寄存器做设定。
基于此，本申请实施例四提供一种显示屏亮度调节方法。参见图9，图9示出了本申请实施例四提供的一种显示屏亮度调节方法的流程图。下面结合图4所示的电子设备对显示屏亮度调节方法进行介绍。
如图9所示，显示屏亮度调节方法可通过如下步骤实现：
S901、响应于用户的重启操作或关机后再开机操作，CPU 10读取存储于存储单元113的亮度衰减系数。
示例性的，存储单元113例如为显示屏11内的扩展显示标识数据表(Extended Display Identification Data，EDID)，当然，存储单元113并不限于此，只要可以存储亮度衰减系数均在本申请实施例的保护范围内。
由前述内容可知，CPU 10可以解析程序指令，处理数据和执行操作等。本申请实施例中，CPU 10不仅可以解析程序指令，处理数据和执行操作等，还可以读取存储于存储单元113的亮度衰减系数。
S902、CPU 10基于亮度衰减系数对背光芯片112a的I2C寄存器做设定。
也就是说，CPU 10读取存储于存储单元113的亮度衰减系数后，不会将亮度衰减系数再存储于BIOS 30或VBIOS 40中，而是基于亮度衰减系数直接对背光芯片的I2C寄存器做设定。
其中，CPU 10基于亮度衰减系数对背光芯片的I2C寄存器做设定的具体过程与实施例一中EC 20基于亮度衰减系数对背光芯片的I2C寄存器做设定的具体过程类似，基于亮度衰减系数对背光芯片的I2C寄存器做设定的过程可以参见实施例一对应的描述(即步骤S505对应处的内容)，此处不再赘述。
综上，本申请实施例中，CPU 10读取存储于显示屏11内的亮度衰减系数，并基于该亮度衰减系数对背光芯片做设定，以改变背光芯片112a输出至背光源112b的驱动电流，进而改变显示屏11的亮度，使得高亮屏的最大亮度降低，低亮屏的最大亮度升 高，使得不同显示屏的亮度均衡，当单独降低高亮屏的最大亮度(相应的驱动LED灯发光的电流减小)时，可以达到降低电子设备功耗的问题，延长电子设备的待机时长；当单独提升低亮屏的最大亮度时，可以提升电子设备的显示效果，且步骤简单。
本实施例还提供一种计算机存储介质，该计算机存储介质中存储有计算机指令，当该计算机指令在电子设备上运行时，使得电子设备执行上述相关方法步骤实现上述实施例中的显示屏亮度调节方法。
本实施例还提供了一种计算机程序产品，当该计算机程序产品在计算机上运行时，使得计算机执行上述相关步骤，以实现上述实施例中的显示屏亮度调节方法。
另外，本申请的实施例还提供一种装置，这个装置具体可以是芯片，组件或模块，该装置可包括相连的处理器和存储器；其中，存储器用于存储计算机执行指令，当装置运行时，处理器可执行存储器存储的计算机执行指令，以使芯片执行上述各方法实施例中的显示屏亮度调节方法。
其中，本实施例提供的电子设备(如手机等)、计算机存储介质、计算机程序产品或芯片均用于执行上文所提供的对应的方法，因此，其所能达到的有益效果可参考上文所提供的对应的方法中的有益效果，此处不再赘述。
通过以上实施方式的描述，所属领域的技术人员可以了解到，为描述的方便和简洁，仅以上述各功能模块的划分进行举例说明，实际应用中，可以根据需要而将上述功能分配由不同的功能模块完成，即将装置的内部结构划分成不同的功能模块，以完成以上描述的全部或者部分功能。
在本申请所提供的几个实施例中，应该理解到，所揭露的装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，模块或单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个装置，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
以上所述，以上实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围。

Claims (20)

  1. 一种显示屏亮度调节方法，其特征在于，应用于电子设备，所述电子设备包括显示屏，所述方法包括：
    获取所述显示屏的亮度衰减系数，其中，所述亮度衰减系数基于所述显示屏的最大亮度和典型最大亮度确定；
    基于所述亮度衰减系数调节所述显示屏的亮度。
  2. 根据权利要求1所述的显示屏亮度调节方法，其特征在于，所述亮度衰减系数为所述典型最大亮度与调节前所述显示屏的最大亮度的比值；
    调节后的显示屏的最大亮度L1与调节前显示屏的最大亮度L2满足：L1＝L2*K；
    其中，K为所述亮度衰减系数。
  3. 根据权利要求1或2所述的显示屏亮度调节方法，其特征在于，基于所述亮度衰减系数调节所述显示屏的亮度，包括：
    基于所述亮度衰减系数调节驱动所述显示屏进行显示的驱动电流。
  4. 根据权利要求3所述的显示屏亮度调节方法，其特征在于，所述显示屏包括液晶显示屏；所述液晶显示屏包括显示面板和背光模组，所述背光模组包括背光芯片和背光源；
    基于所述亮度衰减系数调节驱动所述显示屏进行显示的驱动电流，包括：
    基于所述亮度衰减系数调节所述背光芯片输出至所述背光源的电流。
  5. 根据权利要求3所述的显示屏亮度调节方法，其特征在于，第一驱动电流由粗调电流部分和细调电流部分确定，其中，所述第一驱动电流为调节前所述显示屏的最大亮度对应的驱动电流；
    基于所述亮度衰减系数调节驱动所述显示屏进行显示的驱动电流，包括：
    粗调电流部分不变，基于所述亮度衰减系数调节所述细调电流部分，以形成第二驱动电流，其中，所述第二驱动电流为调节后所述显示屏的最大亮度对应的驱动电流。
  6. 根据权利要求5所述的显示屏亮度调节方法，其特征在于，当所述亮度衰减系数为所述典型最大亮度和调节前所述显示屏的最大亮度的比值时，调节后的细调电流部分A1与调节前的细调电流部分A2满足：A1＝A2*K。
  7. 根据权利要求1所述的显示屏亮度调节方法，其特征在于，所述典型最大亮度为430nit。
  8. 一种电子设备，其特征在于，包括：显示屏；
    还包括：
    存储单元，用于存储亮度衰减系数，其中，所述亮度衰减系数基于所述显示屏的最大亮度和典型最大亮度确定；
    获取模块，用于获取所述亮度衰减系数；
    调节模块，用于根据所述亮度衰减系数调节所述显示屏的亮度。
  9. 根据权利要求8所述的电子设备，其特征在于，所述电子设备还包括基本输入输出系统和嵌入式控制器，所述嵌入式控制器与所述基本输入输出系统电连接；
    所述基本输入输出系统复用为所述存储单元，用于存储亮度衰减系数；
    所述嵌入式控制器复用为所述获取模块和所述调节模块，用于获取所述亮度衰减系数，并根据所述亮度衰减系数调节所述显示屏的亮度。
  10. 根据权利要求9所述的电子设备，其特征在于，所述电子设备还包括处理器，与所述显示屏电连接；所述显示屏包括存储单元，所述存储单元内存储有所述亮度衰减系数；
    所述处理器，用于获取所述存储单元内存储的所述亮度衰减系数，并将所述亮度衰减系数发送至所述基本输入输出系统，以使所述基本输入输出系统对所述亮度衰减系数进行存储。
  11. 根据权利要求8所述的电子设备，其特征在于，所述电子设备包括处理器、显卡基本输入输出系统和嵌入式控制器；所述显示屏包括存储单元，所述存储单元内存储有所述亮度衰减系数；
    所述处理器分别与所述显示屏和所述显卡基本输入输出系统电连接，用于获取所述存储单元内存储的所述亮度衰减系数，并将所述亮度衰减系数发送至所述显卡基本输入输出系统，以使所述显卡基本输入输出系统对所述亮度衰减系数进行存储；
    所述嵌入式控制器复用为所述获取模块和所述调节模块，与所述显卡基本输入输出系统电连接，用于获取所述显卡基本输入输出系统内存储的亮度衰减系数，并根据所述亮度衰减系数调节所述显示屏的亮度。
  12. 根据权利要求8所述的电子设备，其特征在于，所述显示屏包括所述存储单元；
    所述电子设备还包括处理器，与所述显示屏电连接；
    所述处理器复用为所述获取模块和所述调节模块；
    所述处理器，用于获取所述亮度衰减系数，并根据所述亮度衰减系数调节所述显示屏的亮度。
  13. 根据权利要求8所述的电子设备，其特征在于，所述亮度衰减系数为所述典型最大亮度和调节前所述显示屏的最大亮度的比值；
    调节后的显示屏的最大亮度L1与调节前显示屏的最大亮度L2满足：L1＝L2*K；
    其中，K为所述亮度衰减系数。
  14. 根据权利要求8所述的电子设备，其特征在于，所述调节模块，具体用于根据所述亮度衰减系数调节驱动所述显示屏进行显示的驱动电流。
  15. 根据权利要求14所述的电子设备，其特征在于，所述显示屏包括液晶显示屏；所述液晶显示屏包括显示面板和背光模组，所述背光模组包括背光芯片和背光源；所述背光芯片分别与所述背光源和所述调节模块电连接；
    所述调节模块，用于根据所述亮度衰减系数调节所述背光芯片输出至所述背光源的电流。
  16. 根据权利要求14所述的电子设备，其特征在于，第一驱动电流由粗调电流部分和细调电流部分确定，其中，所述第一驱动电流为调节前所述显示屏的最大亮度对应的驱动电流；
    所述调节模块，具体用于根据所述亮度衰减系数调节所述细调电流部分，以形成第二驱动电流，其中，粗调电流部分不变，所述第二驱动电流为调节后所述显示屏的最大亮度对应的电流。
  17. 根据权利要求16所述的电子设备，其特征在于，所述亮度衰减系数为所述典型最大亮度和调节前所述显示屏的最大亮度的比值；调节后的细调电流部分A1与调节前的细调电流部分A2满足：A1＝A2*K；
    其中，K为所述亮度衰减系数。
  18. 根据权利要求8-17任一项所述的电子设备，其特征在于，所述典型最大亮度为430nit。
  19. 根据权利要求8-17任一项所述的电子设备，其特征在于，所述电子设备包括笔记本电脑。
  20. 一种计算机可读存储介质，包括计算机程序，其特征在于，当所述计算机程序在电子设备上运行时，使得所述电子设备执行如权利要求1-7中任一项所述的显示屏亮度调节方法。
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