CN116741087A - Display screen brightness adjusting method and electronic equipment - Google Patents

Display screen brightness adjusting method and electronic equipment Download PDF

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Publication number
CN116741087A
CN116741087A CN202211250558.6A CN202211250558A CN116741087A CN 116741087 A CN116741087 A CN 116741087A CN 202211250558 A CN202211250558 A CN 202211250558A CN 116741087 A CN116741087 A CN 116741087A
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CN
China
Prior art keywords
brightness
display screen
attenuation coefficient
luminance
adjustment
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Legal status (The legal status 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 status listed.)
Pending
Application number
CN202211250558.6A
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Chinese (zh)
Inventor
马骋宇
张友军
吉庆
张伟
王朝
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Honor Device Co Ltd
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Honor Device Co Ltd
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Publication date
Application filed by Honor Device Co Ltd filed Critical Honor Device Co Ltd
Priority to CN202211250558.6A priority Critical patent/CN116741087A/en
Priority to PCT/CN2023/114667 priority patent/WO2024078149A1/en
Publication of CN116741087A publication Critical patent/CN116741087A/en
Pending legal-status Critical Current

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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
    • G09G3/22—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

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Television Receiver Circuits (AREA)

Abstract

The embodiment of the application provides a display screen brightness adjusting method and electronic equipment, relates to the technical field of display, and aims to balance brightness of different screens and reduce power consumption of the electronic equipment when the maximum brightness of a high-brightness screen is independently reduced; when the maximum brightness of the low-brightness screen is independently improved, the display effect of the electronic equipment can be improved. The display screen brightness adjusting method provided by the embodiment of the application is applied to electronic equipment, the electronic equipment comprises a display screen, and the display screen brightness adjusting method comprises the following steps: acquiring a brightness attenuation coefficient of a display screen, wherein the brightness attenuation coefficient is determined based on the maximum brightness and the typical maximum brightness of the display screen; the brightness of the display screen is adjusted based on the brightness decay factor.

Description

Display screen brightness adjusting method and electronic equipment
Technical Field
The present application relates to the field of display technologies, and in particular, to a display screen brightness adjustment method and an electronic device.
Background
Along with the continuous development of display technology, more and more electronic devices with display functions are widely applied to daily life and work of people, and great convenience is brought to daily life and work of people.
The main component of the electronic device for realizing the display function is a display screen. However, the display screen has a difference between its maximum luminance and the set maximum luminance when displayed.
Disclosure of Invention
In order to solve the technical problems, the application provides a display screen brightness adjusting method and electronic equipment. The brightness of different screens can be balanced, and when the maximum brightness of the highlight screen is reduced independently, the problem of reducing the power consumption of the electronic equipment can be solved; when the maximum brightness of the low-brightness screen is independently improved, the display effect of the electronic equipment can be improved.
In a first aspect, an embodiment of the present application provides a method for adjusting brightness of a display screen, which is applied to an electronic device, where the electronic device includes a display screen, and the method for adjusting brightness of the display screen includes: acquiring a brightness attenuation coefficient of a display screen, wherein the brightness attenuation coefficient is determined based on the maximum brightness and the typical maximum brightness of the display screen; the brightness of the display screen is adjusted based on the brightness decay factor.
Determining a brightness attenuation coefficient based on the maximum brightness and the typical maximum brightness of the display screen to be detected, and adjusting the display brightness of the display screen based on the brightness attenuation coefficient when the subsequent display screen is displayed, so that the maximum brightness of the high-brightness screen is reduced, the maximum brightness of the low-brightness screen is increased, the brightness of different display screens is balanced, and when the maximum brightness of the high-brightness screen is independently reduced (the corresponding current for driving the LED lamp to emit light is reduced), the effect of reducing the power consumption of the electronic equipment can be achieved; when the maximum brightness of the low-brightness screen is independently improved, the display effect of the electronic equipment can be improved.
Illustratively, the maximum brightness of the display screen is: before adjustment, the maximum brightness obtained by actual measurement is displayed on the display screen under the drive of preset voltage and preset current. Typical maximum brightness is: and under the drive of preset voltage and preset current, the display screen achieves the maximum brightness theoretically when displaying.
The brightness of the display screen is adjusted based on the brightness attenuation coefficient, so that the difference between the maximum brightness of the adjusted display screen and the typical maximum brightness is within a preset difference range, wherein the preset difference range can be zero, for example, that is, the difference between the maximum brightness of the adjusted display screen and the typical maximum brightness is zero. Of course, the difference between the maximum luminance of the adjusted display screen and the typical maximum luminance is not limited to zero, and the difference between the maximum luminance of the adjusted display screen and the typical maximum luminance is only required to be smaller than the difference between the maximum luminance of the display screen and the typical maximum luminance before adjustment.
According to a first aspect, the luminance decay factor is the ratio of the typical maximum luminance to the maximum luminance of the display screen before adjustment; the maximum brightness L1 of the display screen after adjustment and the maximum brightness L2 of the display screen before adjustment meet the following conditions: l1=l2×k; where K is the luminance decay factor. In this way, the difference between the maximum brightness of the adjusted display screen and the typical maximum brightness is the smallest, that is, the maximum brightness of the adjusted display screen is close to the typical maximum brightness, or the maximum brightness is the same as the typical maximum brightness, when the maximum brightness of the high-brightness screen is reduced independently (the corresponding current for driving the LED lamp to emit light is reduced), the power consumption of the electronic equipment is reduced, and meanwhile, a better effect can be ensured; when the maximum brightness of the low-brightness screen is independently improved, the display effect of the electronic equipment is further improved.
According to a first aspect, or any implementation manner of the first aspect, the adjusting the brightness of the display screen based on the brightness attenuation coefficient includes: and adjusting the driving current for driving the display screen to display based on the brightness attenuation coefficient. The method is simple, and the operation is simple.
According to a first aspect, or any implementation of the first aspect above, the display screen comprises a liquid crystal display screen; the liquid crystal display comprises a display panel and a backlight module, wherein the backlight module comprises a backlight chip and a backlight source; adjusting a drive current for driving the display screen to display based on the luminance decay factor, comprising: and adjusting the current output by the backlight chip to the backlight source based on the brightness attenuation coefficient, wherein the current can drive the backlight source to emit light. Of course, 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 adopting the scheme. It will be appreciated that when the display is of other types, the maximum brightness at the time of display may be made to be close to or equal to the typical maximum brightness by changing other corresponding parameters.
According to a first aspect, or any implementation manner of the first aspect, the first driving current is determined by a coarse tuning current portion and a fine tuning current portion, where the first driving current is a driving current corresponding to a maximum brightness of the display screen before the adjustment; adjusting a drive current for driving the display screen to display based on the luminance decay factor, comprising: the coarse adjustment current part is unchanged, 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 adjusted display screen, the adjustment mode is simple, and the operation rate of the electronic equipment is improved.
According to the first aspect, or any implementation manner of the first aspect, when the luminance attenuation coefficient is a ratio of a typical maximum luminance to a maximum luminance of the display screen before adjustment, the adjusted fine adjustment current portion A1 and the fine adjustment current portion A2 before adjustment satisfy: a1 =a2×k. In this way, the difference between the maximum brightness of the adjusted display screen and the typical maximum brightness is the smallest, that is, the maximum brightness of the adjusted display screen is close to the typical maximum brightness, or the maximum brightness is the same as the typical maximum brightness, when the maximum brightness of the high-brightness screen is reduced independently (the corresponding current for driving the LED lamp to emit light is reduced), the power consumption of the electronic equipment is reduced, and meanwhile, a better effect can be ensured; when the maximum brightness of the low-brightness screen is independently improved, the display effect of the electronic equipment is further improved.
According to the first aspect, or any implementation manner of the first aspect, the typical maximum brightness is 430nit. The brightness has a good display effect, and the use experience of a user is improved. Of course, the typical maximum brightness is not limited thereto, and those skilled in the art may select according to actual circumstances.
In a second aspect, an embodiment of the present application provides an electronic device, including: a display screen; the electronic device further includes: a storage unit for storing a luminance decay coefficient, wherein the luminance decay coefficient is determined based on a maximum luminance and a typical maximum luminance of the display screen; the acquisition module is used for acquiring the brightness attenuation coefficient; and the adjusting module is used for adjusting the brightness of the display screen according to the brightness attenuation coefficient.
Determining a brightness attenuation coefficient based on the maximum brightness and the typical maximum brightness of the display screen to be detected, and adjusting the display brightness of the display screen based on the brightness attenuation coefficient when the subsequent display screen is displayed, so that the maximum brightness of the high-brightness screen is reduced, the maximum brightness of the low-brightness screen is increased, the brightness of different display screens is balanced, and when the maximum brightness of the high-brightness screen is independently reduced (the corresponding current for driving the LED lamp to emit light is reduced), the effect of reducing the power consumption of the electronic equipment can be achieved; when the maximum brightness of the low-brightness screen is independently improved, the display effect of the electronic equipment can be improved.
Illustratively, the maximum brightness of the display screen is: before adjustment, the maximum brightness obtained by actual measurement is displayed on the display screen under the drive of preset voltage and preset current. Typical maximum brightness is: and under the drive of preset voltage and preset current, the display screen achieves the maximum brightness theoretically when displaying.
The brightness of the display screen is adjusted based on the brightness attenuation coefficient, so that the difference between the maximum brightness of the adjusted display screen and the typical maximum brightness is within a preset difference range, wherein the preset difference range can be zero, for example, that is, the difference between the maximum brightness of the adjusted display screen and the typical maximum brightness is zero. Of course, the difference between the maximum luminance of the adjusted display screen and the typical maximum luminance is not limited to zero, and the difference between the maximum luminance of the adjusted display screen and the typical maximum luminance is only required to be smaller than the difference between the maximum luminance of the display screen and the typical maximum luminance before adjustment.
According to a second aspect, the electronic device further comprises a basic input output system and an embedded controller, the embedded controller being electrically connected with the basic input output system; the basic input and output system is multiplexed into a storage unit and is used for storing the brightness attenuation coefficient; the embedded controller is multiplexed into an acquisition module and an adjustment module, and is used 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 is adjusted through the existing basic input and output system and the embedded controller of the electronic equipment, independent setting is not needed, the cost is saved, the space inside the electronic equipment is saved, and the setting of other structures in the electronic equipment is facilitated.
According to a second aspect, or any implementation manner of the second aspect, the electronic device further includes a processor electrically connected to the display screen; the display screen comprises a storage unit, wherein the storage unit stores a brightness attenuation coefficient; and the processor is used for acquiring the brightness attenuation coefficient stored in the storage unit and transmitting the brightness attenuation coefficient to the basic input and output system so that the basic input and output system stores the brightness attenuation coefficient.
The brightness of the display screen is adjusted through the existing processor, the basic input and output system and the storage unit of the electronic equipment, independent setting is not needed, the cost is saved, the space inside the electronic equipment is saved, and the setting of other structures in the electronic equipment is facilitated.
According to a second aspect, or any implementation manner of the second aspect, the electronic device includes a processor, a graphics card basic input output system, and an embedded controller; the display screen comprises a storage unit, wherein the storage unit stores a brightness attenuation coefficient; the processor is respectively and electrically connected with the display screen and the display card basic input/output system, and is used for acquiring the brightness attenuation coefficient stored in the storage unit and transmitting the brightness attenuation coefficient to the display card basic input/output system so as to enable the display card basic input/output system to store the brightness attenuation coefficient; the embedded controller is multiplexed into an acquisition module and an adjustment module, is electrically connected with the display card basic input output system, and is used for acquiring the brightness attenuation coefficient stored in the display card basic input output system and adjusting the brightness of the display screen according to the brightness attenuation coefficient.
The brightness of the display screen is adjusted through the existing processor, the display card basic input and output system, the embedded controller and the storage unit of the electronic equipment, independent setting is not needed, the cost is saved, the space inside the electronic equipment is saved, and the setting of other structures in the electronic equipment is facilitated.
According to a second aspect, or any implementation of the second aspect above, the display screen comprises a storage unit; the electronic device further comprises a processor electrically connected with the display screen; the processor is multiplexed into an acquisition module and an adjustment module; and the processor is used 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 is adjusted through the existing processor and the storage unit of the electronic equipment, independent setting is not needed, the cost is saved, the space inside the electronic equipment is saved, and the setting of other structures in the electronic equipment is facilitated.
According to a second aspect, or any implementation manner of the second aspect, the luminance decay factor is a ratio of a typical maximum luminance to a maximum luminance of the display screen before adjustment; the maximum brightness L1 of the display screen after adjustment and the maximum brightness L2 of the display screen before adjustment meet the following conditions: l1=l2×k; where K is the luminance decay factor. In this way, the difference between the maximum brightness of the adjusted display screen and the typical maximum brightness is the smallest, that is, the maximum brightness of the adjusted display screen is close to the typical maximum brightness, or the maximum brightness is the same as the typical maximum brightness, when the maximum brightness of the high-brightness screen is reduced independently (the corresponding current for driving the LED lamp to emit light is reduced), the power consumption of the electronic equipment is reduced, and meanwhile, a better effect can be ensured; when the maximum brightness of the low-brightness screen is independently improved, the display effect of the electronic equipment is further improved.
According to a second aspect, or any implementation manner of the second aspect, the adjusting module is specifically configured to adjust a driving current for driving the display screen to display according to the luminance attenuation coefficient. The method is simple, and the operation is simple.
According to a second aspect, or any implementation of the second aspect above, the display screen comprises a liquid crystal display screen; the liquid crystal display comprises a display panel and a backlight module, wherein the backlight module comprises a backlight chip and a backlight source; the backlight chip is respectively and electrically connected with the backlight source and the adjusting module; and the adjusting module is used for adjusting the current output by the backlight chip to the backlight source according to the brightness attenuation coefficient, and the current can drive the backlight source to emit light. Of course, 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 adopting the scheme. It will be appreciated that when the display is of other types, the maximum brightness at the time of display may be made to be close to or equal to the typical maximum brightness by changing other corresponding parameters.
According to a second aspect, or any implementation manner of the second aspect, the first driving current is determined by a coarse adjusting current part and a fine adjusting current part, wherein the first driving current is a driving current corresponding to the maximum brightness of the display screen before adjustment; the adjusting module is specifically configured to adjust the fine adjustment current portion according to the brightness attenuation coefficient to form a second driving current, where the coarse adjustment current portion is unchanged, the second driving current is a current corresponding to the maximum brightness of the adjusted display screen, the adjusting mode is simple, and the operation rate of the electronic device is improved.
According to a second aspect, or any implementation manner of the second aspect, the luminance decay factor is a ratio of a typical maximum luminance to a maximum luminance of the display screen before adjustment; the fine-tuning current portion A1 after the adjustment and the fine-tuning current portion A2 before the adjustment satisfy: a1 =a2×k; where K is the luminance decay factor. In this way, the difference between the maximum brightness of the adjusted display screen and the typical maximum brightness is the smallest, that is, the maximum brightness of the adjusted display screen is close to the typical maximum brightness, or the maximum brightness is the same as the typical maximum brightness, when the maximum brightness of the high-brightness screen is reduced independently (the corresponding current for driving the LED lamp to emit light is reduced), the power consumption of the electronic equipment is reduced, and meanwhile, a better effect can be ensured; when the maximum brightness of the low-brightness screen is independently improved, the display effect of the electronic equipment is further improved.
According to the second aspect, or any implementation manner of the second aspect, the typical maximum brightness is 430nit. The brightness has a good display effect, and the use experience of a user is improved. Of course, the typical maximum brightness is not limited thereto, and those skilled in the art may select according to actual circumstances.
According to the second aspect, or any implementation manner of the second aspect, the electronic device includes a notebook computer, and so long as the electronic device capable of displaying is within the protection scope of the embodiment of the present application, the electronic device has the characteristics of long standby time or good display effect.
In a third aspect, embodiments of the present application provide a computer-readable storage medium. The computer readable storage medium comprises a computer program which, when run on an electronic device, causes the electronic device to perform the first aspect and any one of the display screen brightness adjustment methods of the first aspect.
Any implementation manner of the third aspect and any implementation manner of the third aspect corresponds to any implementation manner of the first aspect and any implementation manner of the first aspect, respectively. The technical effects corresponding to the third aspect and any implementation manner of the third aspect may be referred to the technical effects corresponding to the first aspect and any implementation manner of the first aspect, which are not described herein.
In a fourth aspect, an embodiment of the present application provides a computer program product comprising a computer program which, when executed, causes a computer to perform the display screen brightness adjustment method according to the first aspect or any one of the first aspects.
Any implementation manner of the fourth aspect and any implementation manner of the fourth aspect corresponds to any implementation manner of the first aspect and any implementation manner of the first aspect, respectively. Technical effects corresponding to any implementation manner of the fourth aspect may be referred to the technical effects corresponding to any implementation manner of the first aspect, and are not described herein.
In a fifth aspect, the present application provides a chip comprising processing circuitry, transceiver pins. Wherein the transceiver pin and the processing circuit communicate with each other via an internal connection path, the processing circuit executing the display screen brightness adjustment method according to the first aspect or any one of the first aspects to control the receiving pin to receive signals and to control the transmitting pin to transmit signals.
Any implementation manner of the fifth aspect and any implementation manner of the fifth aspect corresponds to any implementation manner of the first aspect and any implementation manner of the first aspect, respectively. Technical effects corresponding to any implementation manner of the fifth aspect may be referred to the technical effects corresponding to any implementation manner of the first aspect, and are not described herein.
Drawings
Fig. 1 shows a test scene diagram of an electronic device according to an embodiment of the present application;
fig. 2 shows a schematic structural diagram of a liquid crystal display according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a backlight chip driving backlight source according to an embodiment of the present application;
fig. 4 is a schematic circuit diagram of an electronic device according to an embodiment of the present application;
Fig. 5 shows a flowchart of a method for adjusting brightness of a display screen according to a first embodiment of the present application;
FIG. 6 is 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 the embodiment of the present application;
fig. 7 is a flowchart of a method for adjusting brightness of a display screen according to a second embodiment of the present application;
fig. 8 is a flowchart of a method for adjusting brightness of a display screen according to a third embodiment of the present application;
fig. 9 is a flowchart of a method for adjusting brightness of a display screen according to a fourth embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone.
The terms first and second and the like in the description and in the claims of embodiments of the application, are used for distinguishing between different objects and not necessarily for describing a particular sequential order of objects. For example, the first target object and the second target object, etc., are used to distinguish between different target objects, and are not used to describe a particular order of target objects.
In embodiments of the application, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g." in an embodiment should not be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.
In the description of the embodiments of the present application, unless otherwise indicated, the meaning of "a plurality" means two or more. For example, the plurality of processing units refers to two or more processing units; the plurality of systems means two or more systems.
Fig. 1 shows an exemplary test scenario in which an electronic device is illustrated as a notebook computer. The display 11 of the notebook computer 100 performs measurement of the maximum brightness when displayed before leaving the factory, and the measurement shows that the maximum brightness when displayed by the first display to be detected and the second display to be detected are different under the driving of the same current and voltage. As shown in fig. 1 (1), the maximum brightness of the first display screen 11a to be detected under the driving of the preset current and the preset voltage is, for example, 430nit, where 430nit is, for example, a typical maximum brightness, which is the maximum brightness theoretically reached by the display screen under the driving of the preset current and the preset voltage. However, the maximum luminance of the second display screen 11b to be detected is 500nit, which is larger than the typical maximum luminance, under the driving of the preset current and the preset voltage. That is, both the display screens consume the same electricity, but the screen brightness is different, and the highlight display screen (i.e., the second display screen to be detected 11 b) is much brighter than the typical display screen (the first display screen to be detected 11 a).
Specific analysis as follows, it should be noted that the following analysis and the following embodiments are described by taking the display screen 11 as a liquid crystal display (Liquid Crystal Display, LCD) screen as an example, and it should be understood that the display screen 11 includes, but is not limited to, an LCD screen, for example, an organic light emitting diode (Organic Light Emitting Diode, OLED) display screen, an LED display screen, and the like, where the LED display screen includes, for example, a Micro-LED display screen, a Mini-LED display screen, and the like, and the type of the display screen 11 is not limited in the embodiments of the present application.
Referring to fig. 2, fig. 2 shows a schematic structural diagram of a liquid crystal display according to an embodiment of the present application. As shown in fig. 2, the LCD display includes a display panel 111 and a backlight module 112. The backlight module 112 includes a backlight chip 112a, a backlight 112b, and a light guide plate 112 c. The backlight chip 112a drives the backlight 112b to be turned on, and light generated when the backlight 112b is turned on is incident from, for example, a side surface of the light guide plate 112c, uniformly passes through the light guide plate 112c, and then 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.
Here, fig. 2 is an illustration taking the backlight 112b as a side-entry light source, but the application is not limited thereto, and in other alternative embodiments, the backlight 112b may be a direct-type light source.
Exemplary, referring to fig. 3, fig. 3 shows a schematic diagram of driving a backlight source to light by a backlight chip according to an embodiment of the present application. As shown in fig. 3, the backlight 112b includes six LED lamp groups connected in parallel, that is, six backlight channels, each LED lamp group including eleven LED lamps. If the desired maximum brightness of the display screen 11 is a typical maximum brightness (i.e., 430 nit), the backlight chip 112a needs to supply 33V and 20mA for each backlight channel, and six channels need to supply 33V and 120mA for each backlight channel.
It is found that when the maximum brightness of the plurality of display screens to be detected is measured before leaving the factory, different display screens to be detected are driven by the same current and voltage (such as 33V voltage and 120mA current), and the maximum brightness of the different display screens to be detected is different, namely the power consumed by the plurality of display screens to be detected is the same, but the brightness of the screen is different, possibly greater than the typical maximum brightness, possibly less than the typical maximum brightness, and possibly the same as the typical maximum brightness.
In view of this, an embodiment of the present application provides a display screen brightness adjustment method and an electronic device, where a brightness attenuation coefficient is determined based on a maximum brightness and a typical maximum brightness of a display screen to be detected, and when a subsequent display screen is displayed, the display brightness of the display screen is adjusted based on the brightness attenuation coefficient, so that the maximum brightness of a high-brightness screen is reduced, the maximum brightness of a low-brightness screen is increased, so that the brightness of different display screens is balanced, and when the maximum brightness of the high-brightness screen is reduced alone (the corresponding current for driving an LED lamp to emit light is reduced), the effect of reducing the power consumption of the electronic device can be achieved; when the maximum brightness of the low-brightness screen is independently improved, the display effect of the electronic equipment can be improved.
The electronic device provided by the embodiment of the application can be an intelligent terminal including a display screen, such as a notebook computer, a mobile phone, a desktop computer, a tablet personal computer, a personal digital assistant (personal digital assistant, PDA for short), a vehicle-mounted computer, a television, an intelligent wearable device, an intelligent household device and the like.
The method for adjusting the brightness of the display screen and the electronic device provided by the embodiment of the application are described below, wherein the electronic device is a notebook computer.
Example 1
Referring to fig. 4, fig. 4 shows a schematic circuit structure of an electronic device according to an embodiment of the present application. As shown in fig. 4, the notebook computer 100 includes a display screen 11, a central processing unit (central processing unit, CPU) 10, an Embedded Controller (EC) 20, a basic input output system (Basic Input Output System, BIOS) 30, a graphics card basic input output system (VIDEO Basic Input Output System, VBIOS) 40, etc., and it will be understood by those skilled in the art that the electronic device shown in fig. 4 is merely an example provided by an embodiment of the present application, and the structure of the electronic device shown in fig. 4 does not constitute a limitation of the electronic device, and the electronic device may include more or less components than those shown, or may combine certain components, split certain components, or different component arrangements.
The CPU 10 is a very large scale integrated circuit, and is a computation core (core) and a control unit (control unit) of an electronic device. The processor may parse program instructions, process data, perform operations, and the like. The EC 20 is operable in both off and on states of the electronic device, and is primarily used to control power-up timing, keyboard and handle functions related to the underlying hardware, such as temperature sensing, charge control, etc. Shutdown herein means that some of the power-hungry devices (e.g., CPU, etc.) of the electronic device are powered down, but the EC 20 remains powered up so that operation can continue. BIOS 30 is the first software loaded when the notebook computer is started, and stores the most important basic input and output programs, the self-checking programs after starting up and the system self-starting programs of the computer, and has the main functions of providing the bottommost and most direct hardware setting and control for the computer. The VBIOS 40 stores the most important basic input and output program of the computer graphics card, the graphics card self-checking program after startup and the graphics card self-starting program, and can read and write specific information of the graphics card in the system setting from the CMOS, and the main function is to provide the bottommost and most direct hardware setting and control for the graphics card. The display screen 11 includes the above-mentioned display panel 111, the backlight module 112 (including the backlight chip 112a and the backlight 112 b), and the storage unit 113 for storing parameters such as manufacturer information and supported resolution of the display screen.
Referring to fig. 5, fig. 5 shows a flowchart of a method for adjusting brightness of a display screen according to a first embodiment of the application. The method for adjusting the brightness of the display screen will be described with reference to the electronic device shown in fig. 4.
As shown in fig. 5, the display screen brightness adjustment method may be implemented by:
s501, after the notebook computer is assembled and before leaving a factory, measuring the maximum brightness of the display screen when the notebook computer is displayed.
After the notebook computer is assembled and before leaving the factory, the backlight chip 112a is controlled to provide a preset voltage and a preset current (such as a voltage of 33V and a current of 20 mA) for each backlight channel, so that the display screen 11 displays, and at this time, the brightness displayed by the display screen 11 is the maximum brightness. The maximum brightness of the display screen at this time can then be measured, for example, with a brightness meter.
For example, a nine-point method may be used to obtain maximum brightness. Specifically, the display screen is divided into nine areas equally, the maximum brightness of each area is measured at the central position of the area through the brightness meter, and the maximum brightness of the nine areas is averaged to determine the maximum brightness when the display screen is displayed.
The manner of measuring the maximum brightness of the display screen is not limited to the use of a brightness meter, and other devices or methods may be used as long as the maximum brightness can be measured. The maximum luminance of the display screen obtained by the nine-point method is only an example of the present application, but the present application is not limited thereto, and for example, the maximum luminance may be obtained by an eighty-one-point method, in which the display screen is divided into eighty-one areas, the maximum luminance of each area is measured at the center position of the area by a luminance meter, and the maximum luminance of the eighty-one area is averaged to determine the maximum luminance when the display screen is displayed.
S502, determining a brightness attenuation coefficient based on the measured maximum brightness and the typical maximum brightness.
The maximum brightness measured is: the backlight chip 112a supplies a preset voltage and a preset current (e.g., a voltage of 33V and a current of 20 mA) to each backlight channel, so that the maximum brightness obtained by the actual measurement is measured when the display screen 11 performs display. Typical maximum brightness is: the backlight chip 112a supplies a preset voltage and a preset current (e.g., a voltage of 33V and a current of 20 mA) to each backlight channel, so that the maximum brightness theoretically reached when the display screen 11 performs display.
When the maximum brightness actually measured is larger than the typical maximum brightness, the display screen is shown to be bright under the drive of preset voltage and preset current, so that electric quantity waste is caused, namely the typical maximum brightness is needed, but the actual maximum brightness is obtained, and the brightness does not bring benefit to the display effect.
When the maximum brightness obtained by actual measurement is smaller than the typical maximum brightness, the display screen is shown to be dark under the drive of preset voltage and preset current, so that the display effect is poor, namely the typical maximum brightness is needed, but the actual obtained brightness is smaller, and the display effect is influenced by the smaller brightness.
Therefore, the brightness attenuation coefficient can be determined based on the measured maximum brightness and the typical maximum brightness, and the display brightness of the subsequent display screen can be adjusted based on the brightness attenuation coefficient when the subsequent display screen is displayed, so that the maximum brightness of the high-brightness screen is reduced, the maximum brightness of the low-brightness screen is increased, the brightness of different display screens is balanced, and when the maximum brightness of the high-brightness screen is independently reduced (the corresponding current for driving the LED lamp to emit light is reduced), the problem of reducing the power consumption of the electronic equipment can be solved; when the maximum brightness of the low-brightness screen is independently improved, the display effect of the electronic device can be improved, wherein the specific adjustment method is introduced in the following steps.
In the embodiment of the application, the luminance attenuation coefficient is, for example, the ratio of the typical maximum luminance to the maximum luminance of the display screen before adjustment. For example, the maximum brightness actually measured is 500nit, and the typical maximum brightness is 430nit, and the brightness attenuation coefficient k=430 nit/500nit. Further exemplary, the maximum luminance actually measured is 400nit, and the typical maximum luminance is 430nit, and the luminance degradation coefficient k=430 nit/400nit.
S503, the luminance decay coefficient is stored in the BIOS 30.
From the foregoing, it will be appreciated that BIOS 30 is the first software loaded during the start-up of a notebook computer, and stores the most important basic input/output programs, post-start self-test programs and system self-start programs of the computer, and has the main function of providing the lowest and most direct hardware configuration and control for the computer. In an embodiment of the present application, BIOS 30 not only provides the lowest, most direct hardware settings and controls, etc. for the computer, but also stores the luminance decay factor for subsequent reading of EC 20.
S504, in response to the reboot operation or the reboot operation after shutdown of the user, the EC 20 reads the luminance decay factor stored in the BIOS 30.
As will be appreciated by those skilled in the art, the CPU 10 and EC 20 will first read some configuration, such as the running rate, in the BIOS 30 when the notebook computer is turned on. In the embodiment of the present application, when the notebook computer is started or restarted, the EC 20 will not only read some configurations in the BIOS 30 first, but also read the luminance attenuation coefficient K stored in the BIOS 30.
S505, EC 20 sets the I2C register of the backlight chip 112a based on the luminance decay coefficient via the I2C bus.
Referring to fig. 6, fig. 6 shows a relationship between a driving current output from a backlight chip to a backlight source and brightness of a display screen. In fig. 6, the abscissa indicates the magnitude of the driving current output from the backlight chip to the backlight, and the ordinate indicates the magnitude of the luminance of the display screen, and as can be seen from fig. 6, the driving current output from the display chip 112a to the backlight 112b is in direct proportion to the luminance of the display screen 11, that is, the larger the driving current, the larger the luminance. Accordingly, when the brightness of the display 11 is the maximum brightness, the driving current output from the display chip 112a to the backlight 112b is the maximum current.
The I2C register of the backlight 112a is set based on the luminance decay factor, that is, the driving current output from the backlight 112a to the backlight 112b is set to change the driving current output to the backlight 112 b.
Specifically, when the luminance degradation coefficient is the ratio of the typical maximum luminance to the maximum luminance of the display screen before adjustment, the driving current after setting is the product of the luminance degradation coefficient and the driving current before setting.
Still referring to the foregoing example, if the maximum brightness actually measured is 500nit and the typical maximum brightness is 430nit, the brightness attenuation coefficient k=430 nit/500nit. Assuming that the driving current before setting is 18mA, wherein 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, and the driving current after setting is 15.48mA, correspondingly, when the driving current is 15.48mA, the maximum display brightness of the display screen is 430nit, namely, the driving current is reduced on the premise of not influencing the display effect, so that the effect of reducing the power consumption of the electronic equipment can be achieved.
Further exemplary, the maximum luminance actually measured is 400nit, and the typical maximum luminance is 430nit, and the luminance degradation coefficient k=430 nit/400nit. Assuming that the driving current before setting is 18mA, wherein the maximum brightness of the display screen corresponding to the 18mA is 400nit, the driving current after setting is the product of 18mA and 430nit/400nit, the driving current after setting is 19.35mA, and correspondingly, 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 the display effect of the display screen is ensured.
The process of setting the I2C register of the backlight chip based on the luminance attenuation coefficient so as to output the corresponding driving current is described below with reference to an actual application scenario, which is not a limitation of the present application. The application scenario is described by taking binary as an example.
The driving current output from the backlight chip 112a is determined by a coarse adjustment section and a fine adjustment section, the coarse adjustment section corresponding to three bits (bits), the fine adjustment section corresponding to twelve bits (bits).
Table 1 shows the correspondence between three bits in the coarse adjustment section and the current value, and table 2 shows the correspondence between twelve bits in the fine adjustment section and the output driving current value.
As can be seen from table 1, the difference between two currents adjacent to the coarse tuning section is large. In order to obtain the preset driving current value, the fine adjustment portion is required to adjust the current determined by the coarse adjustment portion, so that the driving current output by the display chip 112a to the backlight 112b is the preset current.
In this context, for a better understanding, the process of setting the I2C register of the backlight chip 112a by the existing EC 20 will be described as an example.
Assuming that the driving current required to be output by the backlight chip 112a is 18mA, where the maximum brightness of the display screen corresponding to 18mA is 500nit, the specific process of setting the I2C register of the backlight chip by the EC 20 is as follows: three bits of coarse adjustment are set to 011, and coarse adjustment current I corresponding to coarse adjustment part is set at this time max =20 mA, dividing 20mA by 18mA gives 1.11. Since the fine register is twelve bits, and therefore 4095 bits, dividing 4095 by 1.11 to obtain 3685, the fine register is a binary corresponding to 3685, i.e., 011 is written into the backlight chip 112a as the value of the coarse register, a binary corresponding to 3685 is written into the backlight chip 112a as the value of the fine register, and the backlight chip 112a is based on this (3685/4095 is then multiplied by I max ) And outputting 18mA current to the backlight 112b to drive the backlight 112b to light so as to realize the display of the maximum brightness of the display screen, wherein the maximum brightness of the display screen is 500nit and is larger than the typical maximum brightness of 430nit.
In the embodiment of the present application, the process of setting the I2C register of the backlight chip 112a by the EC 20 based on the luminance attenuation coefficient is as follows: three bits of coarse adjustment are set to 011, and at this time, coarse adjustment current imax=20ma corresponding to the coarse adjustment section is obtained by dividing 20ma by 18mA, which is 1.11. Since the fine tuning register is twelve bits, and therefore 4095 bits, dividing 4095 by 1.11 to obtain 3685, and multiplying 3685 by the luminance decay coefficient K (430 nit/500 nit) to obtain 3169, the fine tuning portion is 3169 corresponding binary, i.e., 011 is written into the backlight chip 112a as the value of the coarse tuning register, 3169 corresponding binary is written into the backlight chip 112a as the value of the fine tuning register, and the backlight chip 112a is based on this (3169/4095 is then multiplied by I) max ) And outputting 15.48mA current to the backlight 112b to drive the backlight 112b to light, so as to realize the display of the maximum brightness of the display screen, wherein the maximum brightness displayed by the display screen 11 is 430nit at the moment, and the power consumption can be reduced and the standby time of the electronic equipment can be prolonged while the maximum brightness is met.
Table 1 correspondence between three bits and current values in coarse tuning section
TABLE 2 correspondence between twelve bits in the fine-tuning section and the output drive current value
Binary system Binary corresponding value Drive current
0000 0000 0000 0 0
0000 0000 0001 1 (1/4095)×I max
0000 0000 0010 2 (2/4095)×I max
… … …
0111 1111 1111 2047 (2047/4095)×I max
… … …
1111 1111 1101 4093 (4093/4095)×I max
1111 1111 1110 4094 (4094/4095)×I max
1111 1111 1111 4095 (4095/4095)×I max
In summary, in the embodiment of the present application, the maximum brightness of the display screen is measured first, then, based on the measured maximum brightness and the theoretical maximum brightness (also referred to as typical maximum brightness), a brightness attenuation coefficient is obtained, and the brightness attenuation coefficient is written into the BIOS 30, after the ec 20 reads the brightness attenuation coefficient stored in the BIOS 30, the backlight chip 112a is set based on the brightness attenuation coefficient, so as to change the driving current output by the backlight chip 112a to the backlight 112b, and further, change the brightness of the display screen 11, so that the maximum brightness of the highlight screen is reduced, the maximum brightness of the low-brightness screen is increased, so that the brightness of different display screens is balanced, when the maximum brightness of the highlight screen is reduced alone (corresponding current for driving the LED lamp to emit light is reduced), the problem of reducing the power consumption of the electronic device can be achieved, and the standby time of the electronic device is prolonged; when the maximum brightness of the low-brightness screen is independently improved, the display effect of the electronic equipment can be improved.
Example two
As shown in the first embodiment, the display 11 includes the above-mentioned display panel 111, the backlight module 112 (including the backlight chip 112a and the backlight 112 b), and the storage unit 113 for storing the manufacturer information, the supported resolution, and other parameters of the display. Unlike the first embodiment, in the embodiment of the present application, the storage unit 113 stores not only the manufacturer information of the display screen, the supported resolution, and other parameters, but also the maximum brightness or the brightness attenuation coefficient of the current display screen. That is, the maximum brightness or brightness decay factor of the current display screen is already stored in the storage unit 113 as a parameter of the display screen before the display screen is fed. When the luminance attenuation coefficient is stored in the storage unit 113, the maximum luminance when the display screen is displayed is not required to be measured after the notebook computer is assembled and before leaving the factory, and the luminance attenuation coefficient is not required to be obtained based on the maximum luminance obtained by measurement and the theoretical maximum luminance. When the maximum brightness of the current display screen is stored in the storage unit 113, the maximum brightness of the display screen is not required to be measured after the notebook computer is assembled and before leaving the factory, and the brightness attenuation coefficient is only required to be obtained based on the provided maximum brightness and the theoretical maximum brightness of the current display screen.
Based on this, a second embodiment of the present application provides a method for adjusting brightness of a display screen. Referring to fig. 7, fig. 7 is a flowchart of a method for adjusting brightness of a display screen according to a second embodiment of the present application, where a brightness attenuation coefficient is stored in the storage unit 113. The method for adjusting the brightness of the display screen will be described with reference to the electronic device shown in fig. 4.
As shown in fig. 7, the display screen brightness adjustment method may be implemented by:
in S701, in response to a restart operation or a restart operation after shutdown by the user, the CPU 10 reads the luminance decay coefficient stored in the storage unit 113.
The storage unit 113 is exemplified by an extended display identification data table (Extended Display Identification Data, EDID) in the display screen 11, for example, and of course, the storage unit 113 is not limited thereto, as long as the luminance attenuation coefficient can be stored within the protection scope of the embodiment of the present application.
From the foregoing, the CPU 10 can parse program instructions, process data, perform operations, and the like. In the embodiment of the present application, the CPU 10 may not only parse program instructions, process data, perform operations, and the like, but also read the luminance decay coefficient stored in the storage unit 113.
S702, the CPU 10 stores the read luminance degradation coefficient in the BIOS 30.
That is, BIOS 30 of embodiments of the present application also stores the luminance decay factor for subsequent reading of EC 20.
S703, EC 20 reads the luminance decay factor stored in BIOS 30.
As will be appreciated by those skilled in the art, the CPU 10 and EC 20 will first read some configuration, such as the running rate, in the BIOS 30 when the notebook computer is turned on. In the embodiment of the present application, when the notebook computer is started or restarted, the EC 20 will not only read some configurations in the BIOS 30 first, but also read the luminance attenuation coefficient stored in the BIOS 30.
S704, EC 20 sets the I2C register of the backlight chip 112a based on the brightness attenuation coefficient through the I2C bus.
The specific process of setting the I2C register of the backlight chip based on the luminance attenuation coefficient by the EC through the I2C bus is the same as that of the first embodiment, and the specific process may be referred to the corresponding description of the first embodiment, which is not repeated herein.
In summary, in the embodiment of the present application, the CPU 10 reads the luminance attenuation coefficient stored in the display screen 11, writes the luminance attenuation coefficient into the BIOS 30, after the ec 20 reads the luminance attenuation coefficient stored in the BIOS 30, sets the backlight chip based on the luminance attenuation coefficient, so as to change the driving current output from the backlight chip 112a to the backlight 112b, further change the luminance of the display screen 11, so that the maximum luminance of the highlight screen is reduced, the maximum luminance of the low-luminance screen is increased, so that the luminance of different display screens is balanced, when the maximum luminance of the highlight screen is reduced alone (the corresponding current for driving the LED lamp to emit light is reduced), the problem of reducing the power consumption of the electronic device can be achieved, and the standby time of the electronic device is prolonged; when the maximum brightness of the low-brightness screen is independently improved, the display effect of the electronic equipment can be improved.
Example III
Unlike the second embodiment, the embodiment of the present application stores the luminance decay coefficient read by the CPU 10 in the VBIOS 40. As can be seen from the first embodiment, the VBIOS 40 stores the most important basic input/output program of the computer graphics card, the graphics card self-checking program after power-on and the graphics card self-starting program, and can read and write specific information of the graphics card in the system setting from the CMOS, and its main function is to provide the bottommost and most direct hardware setting and control for the graphics card. In the embodiment of the present application, the VBIOS 40 not only provides the bottommost and most direct hardware setting and control for the graphics card, but also stores the luminance decay coefficient.
Based on this, the third embodiment of the application provides a display screen brightness adjusting method. Referring to fig. 8, fig. 8 is a flowchart of a method for adjusting brightness of a display screen according to a third embodiment of the present application, where a brightness attenuation coefficient is stored in the storage unit 113. The method for adjusting the brightness of the display screen will be described with reference to the electronic device shown in fig. 4.
As shown in fig. 8, the display screen brightness adjustment method may be implemented by:
s801, in response to a restart operation or a restart operation after shutdown by the user, the CPU 10 reads the luminance decay coefficient stored in the storage unit 113.
The storage unit 113 is exemplified by an extended display identification data table (Extended Display Identification Data, EDID) in the display screen 11, for example, and of course, the storage unit 113 is not limited thereto, as long as the luminance attenuation coefficient can be stored within the protection scope of the embodiment of the present application.
From the foregoing, the CPU 10 can parse program instructions, process data, perform operations, and the like. In the embodiment of the present application, the CPU 10 may not only parse program instructions, process data, perform operations, and the like, but also read the luminance decay coefficient stored in the storage unit 113.
S802, the CPU 10 stores the read luminance decay coefficient in the VBIOS 40.
That is, in the embodiment of the present application, the VBIOS 40 not only provides the bottommost, most direct hardware setting and control for the graphics card, but also stores the luminance decay coefficient.
S803, EC 20 reads the luminance decay coefficient stored in VBIOS 40.
In the embodiment of the present application, when the notebook computer is started or restarted, the EC 20 also reads the luminance decay coefficient stored in the VBIOS 40.
S804, EC 20 sets the I2C register of the backlight chip 112a based on the brightness attenuation coefficient through the I2C bus.
The specific process of setting the I2C register of the backlight chip based on the luminance attenuation coefficient by the EC through the I2C bus is the same as that of the first embodiment, and the specific process may be referred to the corresponding description of the first embodiment, which is not repeated herein.
In summary, in the embodiment of the present application, the CPU 10 reads the luminance attenuation coefficient stored in the display screen 11, writes the luminance attenuation coefficient into the VBIOS 40, and after the ec 20 reads the luminance attenuation coefficient stored in the VBIOS 40, sets the backlight chip based on the luminance attenuation coefficient, so as to change the driving current output from the backlight chip 112a to the backlight 112b, further change the luminance of the display screen 11, so that the maximum luminance of the highlight screen is reduced, the maximum luminance of the low-luminance screen is increased, so that the luminance of different display screens is balanced, and when the maximum luminance of the highlight screen is reduced alone (the corresponding current for driving the LED lamp to emit light is reduced), the problem of reducing the power consumption of the electronic device can be achieved, and the standby time of the electronic device is prolonged; when the maximum brightness of the low-brightness screen is independently improved, the display effect of the electronic equipment can be improved.
Example IV
Unlike the third embodiment, the CPU 10 in the embodiment of the present application can not only parse program instructions, process data and perform operations, and read the luminance attenuation coefficient stored in the storage unit 113, but also set the I2C register of the backlight chip based on the luminance attenuation coefficient.
Based on this, the fourth embodiment of the application provides a display screen brightness adjusting method. Referring to fig. 9, fig. 9 shows a flowchart of a method for adjusting brightness of a display screen according to a fourth embodiment of the present application. The method for adjusting the brightness of the display screen will be described with reference to the electronic device shown in fig. 4.
As shown in fig. 9, the display screen brightness adjustment method may be implemented by:
s901, in response to a restart operation or a restart operation after shutdown by the user, the CPU 10 reads the luminance decay coefficient stored in the storage unit 113.
The storage unit 113 is exemplified by an extended display identification data table (Extended Display Identification Data, EDID) in the display screen 11, for example, and of course, the storage unit 113 is not limited thereto, as long as the luminance attenuation coefficient can be stored within the protection scope of the embodiment of the present application.
From the foregoing, the CPU 10 can parse program instructions, process data, perform operations, and the like. In the embodiment of the present application, the CPU 10 may not only parse program instructions, process data, perform operations, and the like, but also read the luminance decay coefficient stored in the storage unit 113.
S902, the CPU 10 sets the I2C register of the backlight chip 112a based on the luminance decay coefficient.
That is, after the CPU 10 reads the luminance decay coefficient stored in the storage unit 113, the luminance decay coefficient is not stored in the BIOS 30 or the VBIOS 40 again, but the I2C register of the backlight chip is directly set based on the luminance decay coefficient.
The specific process of setting the I2C register of the backlight chip by the CPU 10 based on the luminance attenuation coefficient is similar to the specific process of setting the I2C register of the backlight chip by the EC 20 based on the luminance attenuation coefficient in the first embodiment, and the process of setting the I2C register of the backlight chip based on the luminance attenuation coefficient can be referred to the description corresponding to the first embodiment (i.e. the content corresponding to step S505), which is not repeated here.
In summary, in the embodiment of the present application, the CPU 10 reads the luminance attenuation coefficient stored in the display screen 11, and sets the backlight chip based on the luminance attenuation coefficient, so as to change the driving current output from the backlight chip 112a to the backlight 112b, and further change the luminance of the display screen 11, so that the maximum luminance of the highlight screen is reduced, the maximum luminance of the low-luminance screen is increased, so that the luminance of different display screens is balanced, and when the maximum luminance of the highlight screen is reduced alone (the corresponding current for driving the LED lamp to emit light is reduced), the problem of reducing the power consumption of the electronic device can be achieved, and the standby duration of the electronic device is prolonged; when the maximum brightness of the low-brightness screen is independently improved, the display effect of the electronic equipment can be improved, and the steps are simple.
The present embodiment also provides a computer storage medium having stored therein computer instructions that, when executed on an electronic device, cause the electronic device to execute the above-described related method steps to implement the display screen brightness adjustment method in the above-described embodiments.
The present embodiment also provides a computer program product which, when run on a computer, causes the computer to perform the above-described related steps to implement the display screen brightness adjustment method in the above-described embodiments.
In addition, embodiments of the present application also provide an apparatus, which may be embodied as a chip, component or module, which may include a processor and a memory coupled to each other; the memory is used for storing computer-executed instructions, and when the device is operated, the processor can execute the computer-executed instructions stored in the memory, so that the chip executes the display screen brightness adjustment method in each method embodiment.
The electronic device (such as a mobile phone) provided in this embodiment, the computer storage medium, the computer program product or the chip are used to execute the corresponding method provided above, so that the beneficial effects thereof can be referred to the beneficial effects in the corresponding method provided above, and will not be described herein.
It will be appreciated by those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional modules is illustrated, and in practical application, the above-described functional allocation may be performed by different functional modules according to needs, i.e. the internal structure of the apparatus is divided into different functional modules to perform all or part of the functions described above.
In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of modules or units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another apparatus, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.

Claims (20)

1. A display screen brightness adjustment method, characterized by being applied to an electronic device, the electronic device including a display screen, the method comprising:
acquiring a brightness attenuation coefficient of the display screen, wherein the brightness attenuation coefficient is determined based on the maximum brightness and the typical maximum brightness of the display screen;
and adjusting the brightness of the display screen based on the brightness attenuation coefficient.
2. The method of claim 1, wherein the luminance decay factor is a ratio of the typical maximum luminance to the maximum luminance of the display screen before adjustment;
the maximum brightness L1 of the display screen after adjustment and the maximum brightness L2 of the display screen before adjustment meet the following conditions: l1=l2×k;
wherein K is the luminance decay coefficient.
3. The display screen brightness adjustment method according to claim 1 or 2, characterized in that adjusting the brightness of the display screen based on the brightness attenuation coefficient comprises:
and adjusting the driving current for driving the display screen to display based on the brightness attenuation coefficient.
4. A display screen brightness adjustment method according to claim 3, characterized in that the display screen comprises a liquid crystal display screen; the liquid crystal display comprises a display panel and a backlight module, wherein the backlight module comprises a backlight chip and a backlight source;
Adjusting a driving current for driving the display screen to display based on the brightness attenuation coefficient, including:
and adjusting the current output by the backlight chip to the backlight source based on the brightness attenuation coefficient.
5. A display screen brightness adjustment method according to claim 3, characterized in that a first drive current is determined by a coarse adjustment current part and a fine adjustment current part, wherein the first drive current is a drive current corresponding to the maximum brightness of the display screen before adjustment;
adjusting a driving current for driving the display screen to display based on the brightness attenuation coefficient, including:
the coarse adjustment current part is 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.
6. The method according to claim 5, wherein when the luminance degradation coefficient is a ratio of the typical maximum luminance to the maximum luminance of the display screen before adjustment, the fine adjustment current portion A1 after adjustment and the fine adjustment current portion A2 before adjustment satisfy: a1 =a2×k.
7. The method of claim 1, wherein the typical maximum brightness is 430nit.
8. An electronic device, comprising: a display screen;
further comprises:
a storage unit configured to store a luminance degradation coefficient, wherein the luminance degradation coefficient is determined based on a maximum luminance and a typical maximum luminance of the display screen;
the acquisition module is used for acquiring the brightness attenuation coefficient;
and the adjusting module is used for adjusting the brightness of the display screen according to the brightness attenuation coefficient.
9. The electronic device of claim 8, further comprising a basic input output system and an embedded controller, the embedded controller being electrically connected to the basic input output system;
the basic input and output system is multiplexed into the storage unit and is used for storing the brightness attenuation coefficient;
the embedded controller is multiplexed into the acquisition module and the adjustment module, and is used for acquiring the brightness attenuation coefficient and adjusting the brightness of the display screen according to the brightness attenuation coefficient.
10. The electronic device of claim 9, further comprising a processor electrically connected to the display screen; the display screen comprises a storage unit, wherein the brightness attenuation coefficient is stored in the storage unit;
The processor is configured to obtain the luminance attenuation coefficient stored in the storage unit, and send the luminance attenuation coefficient to the basic input/output system, so that the basic input/output system stores the luminance attenuation coefficient.
11. The electronic device of claim 8, wherein the electronic device comprises a processor, a graphics card basic input output system, and an embedded controller; the display screen comprises a storage unit, wherein the brightness attenuation coefficient is stored in the storage unit;
the processor is electrically connected with the display screen and the display card basic input output system respectively, and is used for acquiring the brightness attenuation coefficient stored in the storage unit and sending the brightness attenuation coefficient to the display card basic input output system so as to enable the display card basic input output system to store the brightness attenuation coefficient;
the embedded controller is multiplexed into the acquisition module and the adjustment module, is electrically connected with the display card basic input output system, and is used for acquiring the brightness attenuation coefficient stored in the display card basic input output system and adjusting the brightness of the display screen according to the brightness attenuation coefficient.
12. The electronic device of claim 8, wherein the display screen comprises the storage unit;
the electronic device further comprises a processor electrically connected with the display screen;
the processor is multiplexed into the acquisition module and the adjustment module;
the processor is used for acquiring the brightness attenuation coefficient and adjusting the brightness of the display screen according to the brightness attenuation coefficient.
13. The electronic device of claim 8, wherein the luminance decay factor is a ratio of the typical maximum luminance to a maximum luminance of the display screen prior to adjustment;
the maximum brightness L1 of the display screen after adjustment and the maximum brightness L2 of the display screen before adjustment meet the following conditions: l1=l2×k;
wherein K is the luminance decay coefficient.
14. The electronic device according to claim 8, wherein the adjusting module is specifically configured to adjust a driving current for driving the display screen to display according to the luminance attenuation coefficient.
15. The electronic device of claim 14, wherein the display screen comprises a liquid crystal display screen; the liquid crystal display comprises a display panel and a backlight module, wherein the backlight module comprises a backlight chip and a backlight source; the backlight chip is respectively and electrically connected with the backlight source and the adjusting module;
The adjusting module is used for adjusting the current output by the backlight chip to the backlight source according to the brightness attenuation coefficient.
16. The electronic device of claim 14, wherein a first drive current is determined by a coarse current portion and a fine current portion, wherein the first drive current is a drive current corresponding to a maximum brightness of the display screen prior to adjustment;
the adjusting module is specifically configured to adjust the fine adjustment current portion according to the brightness attenuation coefficient to form a second driving current, where the coarse adjustment current portion is unchanged, and the second driving current is a current corresponding to the maximum brightness of the display screen after adjustment.
17. The electronic device of claim 16, wherein the luminance decay factor is a ratio of the typical maximum luminance to a maximum luminance of the display screen prior to adjustment; the fine-tuning current portion A1 after the adjustment and the fine-tuning current portion A2 before the adjustment satisfy: a1 =a2×k;
wherein K is the luminance decay coefficient.
18. The electronic device of any of claims 8-17, wherein the typical maximum brightness is 430nit.
19. The electronic device of any of claims 8-17, wherein the electronic device comprises a notebook computer.
20. A computer readable storage medium comprising a computer program, characterized in that the computer program, when run on an electronic device, causes the electronic device to perform the display brightness adjustment method according to any one of claims 1-7.
CN202211250558.6A 2022-10-12 2022-10-12 Display screen brightness adjusting method and electronic equipment Pending CN116741087A (en)

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PCT/CN2023/114667 WO2024078149A1 (en) 2022-10-12 2023-08-24 Brightness adjustment method for display screen, and electronic device

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