CN112449026B - Ambient light compensation method, device, terminal and storage medium - Google Patents
Ambient light compensation method, device, terminal and storage medium Download PDFInfo
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- CN112449026B CN112449026B CN201910804750.7A CN201910804750A CN112449026B CN 112449026 B CN112449026 B CN 112449026B CN 201910804750 A CN201910804750 A CN 201910804750A CN 112449026 B CN112449026 B CN 112449026B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
- H04M1/0266—Details of the structure or mounting of specific components for a display module assembly
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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
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The invention discloses an ambient light compensation method. The method comprises the following steps: acquiring a first light sensation value of the current environment through a light sensor; determining a light leakage value of the current display brightness of the display screen according to a pre-established corresponding relation between the display brightness of the display screen and the light leakage value of the display screen; and compensating the first light sensation value by adopting the light leakage value of the current display brightness of the display screen, and determining the compensated first light sensation value as the current environment brightness. Therefore, the first light sensation value of the current environment detected by the light sensor is compensated by adopting the light leakage value of the display screen, the interference of light leakage of the display screen on the ambient light induction can be reduced, and the accuracy of the ambient light induction is correspondingly improved.
Description
Technical Field
The present invention relates to the field of electronic technologies, and in particular, to an ambient light compensation method, an ambient light compensation device, a terminal, and a storage medium.
Background
At present, mobile terminals such as mobile phones and the like detect the ambient light brightness through a built-in light sensor so as to adjust the display brightness of a display screen of the mobile terminal in real time according to the ambient light brightness.
However, as the full screen concept proposes, the arrangement space of components such as the light sensor inside the mobile terminal is more and more limited. Therefore, many mobile phones adopt narrow slit design scheme, and Liquid Crystal Display (LCD) is very close to light sensor under this kind of scheme, because LCD is shaded and is not totally enclosed, then light sensor also can detect the light that LCD leaked when detecting external environment light to reduce the accurate degree of ambient light response, influence the effect of follow-up LCD automatic brightness adjustment.
Disclosure of Invention
The invention provides an ambient light compensation method, an ambient light compensation device and a storage medium.
According to a first aspect of an embodiment of the present invention, there is provided an ambient light compensation method, including:
acquiring a first light sensation value of the current environment through a light sensor;
determining a light leakage value of the current display brightness of the display screen according to a pre-established corresponding relation between the display brightness of the display screen and the light leakage value of the display screen;
and compensating the first light sensation value by adopting the light leakage value of the current display brightness of the display screen, and determining the compensated first light sensation value as the current environment brightness.
In one embodiment, establishing a correspondence between display brightness of the display screen and a light leakage value of the display screen includes:
Detecting a first light leakage value of the display screen when the display screen displays first display brightness;
detecting a second light leakage value of the display screen when the display screen displays second display brightness;
and determining the corresponding relation according to the first display brightness, the first light leakage value, the second display brightness and the second light leakage value.
In one embodiment, the determining the correspondence according to the first display luminance, the first light leakage value, the second display luminance, and the second light leakage value includes:
taking the first display brightness and the first light leakage value as a first fitting coordinate;
taking the second display brightness and the second light leakage value as second fitting coordinates;
and performing linear equation fitting based on the first fitting coordinate and the second fitting coordinate to obtain a linear equation representing the corresponding relation.
In one embodiment, the detecting the first light leakage value of the display screen when the display screen displays the first display brightness includes: placing the display screen with the first display brightness in a dark box environment, and detecting a first light leakage value of the display screen through the light sensor;
When the display screen displays the second display brightness, detecting the second light leakage value of the display screen comprises the following steps: and placing the display screen with the second display brightness in a dark box environment, and detecting a second light leakage value of the display screen through the light sensor.
In one embodiment, the obtaining, by the light sensor, the first light sensation value of the current environment includes:
acquiring a first light sensation value of the current environment through an nth light sensation channel of the light sensor, wherein N is a positive integer smaller than N, N is the total number of the light sensation channels, and the wavelengths of light rays corresponding to different light sensation channels are different;
the determining the light leakage value of the current display brightness of the display screen according to the pre-established corresponding relation between the display brightness of the display screen and the light leakage value of the display screen comprises the following steps:
according to the corresponding relation between the display brightness of the display screen and the light leakage value of the nth photosensitive channel, determining the light leakage value of the current display brightness of the display screen in the nth photosensitive channel;
the first light sensation value is compensated by adopting the light leakage value of the current display brightness of the display screen, the compensated first light sensation value is determined as the current environment brightness, and the method comprises the following steps:
And compensating the first light sensation value of the nth light sensation channel by utilizing the light leakage value of the current display brightness of the display screen in the nth light sensation channel, and determining the compensated first light sensation value of the nth light sensation channel as the ambient light brightness of the current environment in the nth light sensation channel.
In one embodiment, the method further comprises:
and according to a preset combination rule, combining the ambient light brightness corresponding to each of the M compensated photosensitive channels into the current ambient light brightness, wherein M is a positive integer less than or equal to N.
According to a second aspect of an embodiment of the present invention, there is provided an ambient light compensation device comprising: the system comprises an acquisition module, a first determination module and a compensation module, wherein,
the acquisition module is used for acquiring a first light sensation value of the current environment by acquiring the light sensor;
the first determining module is used for determining a light leakage value of the current display brightness of the display screen according to a pre-established corresponding relation between the display brightness of the display screen and the light leakage value of the display screen;
the compensation module is used for compensating the first light sensation value by adopting the light leakage value of the current display brightness of the display screen, and determining the compensated first light sensation value as the current environment brightness.
In one embodiment, the apparatus further comprises: the second determining module is used for determining the corresponding relation between the display brightness of the display screen and the light leakage value of the display screen;
the second determining module is specifically configured to:
detecting a first light leakage value of the display screen when the display screen displays first display brightness;
detecting a second light leakage value of the display screen when the display screen displays second display brightness;
and determining the corresponding relation according to the first display brightness, the first light leakage value, the second display brightness and the second light leakage value.
In one embodiment, the second determining module includes: the first determining submodule is used for taking the first display brightness and the first light leakage value as first fitting coordinates; taking the second display brightness and the second light leakage value as second fitting coordinates; and performing linear equation fitting based on the first fitting coordinate and the second fitting coordinate to obtain a linear equation representing the corresponding relation.
In one embodiment, the second determining module includes:
the first detection submodule is used for placing the display screen with the first display brightness in a camera bellows environment and detecting a first light leakage value of the display screen through the light sensor;
And the second detection submodule is used for placing the display screen with the second display brightness in a camera bellows environment and detecting a second light leakage value of the display screen through the light sensor.
In one embodiment, the acquisition module includes:
the acquisition sub-module is used for acquiring a first light sensation value of the current environment through an nth light sensation channel of the light sensor, wherein N is a positive integer smaller than N, N is the total number of the light sensation channels, and the wavelengths of light rays corresponding to different light sensation channels are different;
the first determining module includes:
the second determining submodule is used for determining the light leakage value of the current display brightness of the display screen in the nth photosensitive channel according to the corresponding relation between the display brightness of the display screen and the light leakage value of the nth photosensitive channel;
the compensation module comprises:
and the compensation sub-module is used for compensating the first light sensation value of the nth light sensation channel by utilizing the light leakage value of the current display brightness of the display screen in the nth light sensation channel, and determining the compensated first light sensation value of the nth light sensation channel as the ambient light brightness of the current environment in the nth light sensation channel.
In one embodiment, the apparatus further comprises:
And the combination module is used for combining the ambient light brightness corresponding to each of the M compensated photosensitive channels into the current ambient light brightness according to a preset combination rule, wherein M is a positive integer less than or equal to N.
According to a third aspect of an embodiment of the present invention, there is provided a terminal including a processor, a memory, and an executable program stored on the memory and capable of being executed by the processor, characterized in that the processor executes the steps of the ambient light compensation method of the first aspect when executing the executable program.
According to a fourth aspect of embodiments of the present invention, there is provided a storage medium having stored thereon an executable program, characterized in that the executable program when executed by a processor implements the steps of the ambient light compensation method of the first aspect.
The embodiment of the invention discloses an ambient light compensation method, an ambient light compensation device, a terminal and a storage medium;
acquiring a first light sensation value of the current environment through a light sensor; determining a light leakage value of the current display brightness of the display screen according to a pre-established corresponding relation between the display brightness of the display screen and the light leakage value of the display screen; and compensating the first light sensation value by adopting the light leakage value of the current display brightness of the display screen, and determining the compensated first light sensation value as the current environment brightness. The first light sensation value of the current environment detected by the light sensor is compensated by adopting the light leakage value of the display screen, so that the interference of light leakage of the display screen to the ambient light induction can be reduced, and the accuracy of the ambient light induction is correspondingly improved. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a flow chart illustrating a method of ambient light compensation according to an exemplary embodiment;
FIG. 2 is a schematic diagram showing correspondence between display brightness and light leakage value of a display screen according to an exemplary embodiment;
FIG. 3 is a flow chart of a method of testing a mobile phone according to an exemplary embodiment;
FIG. 4 is a block diagram of an ambient light compensation device, according to an example embodiment;
FIG. 5 is a block diagram of another ambient light compensation device shown according to an exemplary embodiment;
FIG. 6 is a block diagram illustrating yet another ambient light compensation device according to an example embodiment;
FIG. 7 is a block diagram of yet another ambient light compensation device, according to an example embodiment;
FIG. 8 is a block diagram of yet another ambient light compensation device, according to an example embodiment;
fig. 9 is a block diagram showing a constituent structure of an apparatus for ambient light compensation according to an exemplary embodiment.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with embodiments of the invention. Rather, they are merely examples of apparatus and methods consistent with aspects of embodiments of the invention as detailed in the accompanying claims.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of embodiments of the invention. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.
It should be understood that although the terms first, second, third, etc. may be used in embodiments of the present invention to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, the first information may also be referred to as second information, and similarly, the second information may also be referred to as first information, without departing from the scope of embodiments of the present invention. The word "if" as used herein may be interpreted as "at … …" or "at … …" or "responsive to a determination", depending on the context.
Execution bodies to which embodiments of the present disclosure relate include, but are not limited to: mobile terminals such as mobile phones.
The application scene of the embodiment of the disclosure is that in the process of realizing automatic brightness adjustment of a display screen by a mobile terminal such as a mobile phone, the ambient light sensed by a light sensor is taken as a reference. And when the ambient light brightness is higher, the display screen brightness is increased, and when the ambient light brightness is lower, the display screen brightness is correspondingly reduced. At present, many mobile phones adopt narrow slit design scheme, and the display screen is very close light sensor under this kind of scheme, and the display screen is shaded and is not totally closed, and light sensor is in the same time receiving external environment light and is received the light that the display screen is shaded and leak to reduce the accurate degree of ambient light response, influence follow-up display screen automatic brightness adjustment effect.
FIG. 1 is a flow chart illustrating a method of ambient light compensation, as shown in FIG. 1, according to an exemplary embodiment, the method comprising the specific steps of:
step 101: acquiring a first light sensation value of the current environment through a light sensor;
step 102: determining the light leakage value of the current display brightness of the display screen according to the pre-established corresponding relation between the display brightness of the display screen and the light leakage value of the display screen;
step 103: and compensating the first light sensation value by adopting the light leakage value of the display brightness of the current display screen, and determining the compensated first light sensation value as the current environment light brightness.
The display screen may be an LCD display screen in a mobile terminal such as a mobile phone, and the light sensor may be a sensor for detecting the brightness of ambient light inside the mobile terminal. The backlight of the LCD display screen in the mobile phone is not completely closed, so that light leakage can be generated. The light leaked from the display screen irradiates the light sensor, the light sensor senses the light, and the light leakage part of the display screen sensed by the light sensor is called a light leakage value, and the light leakage value can be a light intensity value (Lux).
The light leakage value of the display screen sensed by the light sensor under different display brightness can be measured in advance, and a preset mode (such as fitting and the like) is adopted to establish the corresponding relation between the display brightness of the display screen and the light leakage value of the display screen.
Because the performance parameters of the display screens adopted by different mobile terminals are different, and the display brightness and the light leakage value of the display screens are related to the performance parameters of the display screens, the corresponding relation between the display brightness and the light leakage value of different display screens is also different, and then the corresponding relation between the display brightness and the light leakage value of various display screens is required to be established according to the type of the display screens in the pre-measurement stage.
In the embodiment of the disclosure, the display brightness of the different display screens may be a preset level of display brightness corresponding to each of the different display screens. For example, the display luminance of the class a display screen may be set to 2048 levels, and the display screens are set to be sequentially brighter from level 1 to level 2048. The display brightness and the light leakage value of the display screen at different levels can be sampled, and the corresponding relation between the display brightness and the light leakage value of the display screen at different levels can be fitted by adopting modes such as equation fitting. The equation fitting may be a curve equation fitting or a linear equation fitting, and the curve equation may include: rounded curve equations and/or polyline equations.
The light leakage value of the display brightness of the current display screen can be determined through the corresponding relation between the display brightness of the display screen and the light leakage value. The display brightness of the current display screen can be set by a user or automatically set by a system in the mobile phone, and the processor of the mobile phone and the like can read the display brightness of the current display screen and determine the light leakage value of the display brightness of the current display screen.
The first light sensation value sensed by the light sensor can be compensated by adopting the light leakage value of the display brightness of the current display screen, and the compensated result is determined as the current environment light brightness. The first light sensation value sensed by the light sensor can be read by a processor in the mobile phone and the like, and the first light sensation value sensed by the light sensor is compensated.
Preferably, because the light leakage of the ambient light and the display screen is superimposed and irradiated on the light sensor, the light sensation value sensed by the light sensor is larger than the actual ambient light brightness, therefore, the light leakage value of the current display screen display brightness is adopted to compensate the first light sensation value sensed by the light sensor, for example, the light leakage value of the display screen is subtracted from the first light sensation value sensed by the light sensor, so as to obtain the actual ambient light brightness.
Therefore, the light sensation value of the current environment measured by the light ray sensor is compensated according to the light leakage value corresponding to the display screen, so that interference caused by light leakage of the display screen to the ambient light sensed by the light ray sensor is reduced, the accuracy of the ambient light sensing is improved, and further, the compensated current ambient brightness is used as a reference for adjusting the display brightness of the display screen, the accuracy of automatic adjustment of the display brightness of the display screen can be improved, and the user experience is further improved.
In one embodiment, establishing a correspondence between display brightness of a display screen and a light leakage value of the display screen includes: detecting a first light leakage value of the display screen when the display screen displays the first display brightness; detecting a second light leakage value of the display screen when the display screen displays the second display brightness; and determining a corresponding relation according to the first display brightness, the first light leakage value, the second display brightness and the second light leakage value.
Further, through multiple test measurements, it is determined that the light leakage value of the display screen will change along with the change of the display brightness of the display screen, so that the corresponding relationship between the display brightness of the display screen and the light leakage value of the display screen can be fitted.
In one embodiment, the first display luminance and the second display luminance are set to different luminance levels of the display screen. The first display brightness may be the highest brightness of the display screen. The second display brightness can be obtained by adopting a dichotomy method and the like, and the middle brightness is taken between the highest brightness of the display screen and the display brightness of the display screen as 0, namely 1/2 of the highest brightness; when the display screen is at the second display brightness, if the light leakage value sensed by the light sensor is not 0, determining the light leakage value of the second display brightness as the second light leakage value. If the light leakage value sensed by the light sensor is 0 when the display screen displays the second display brightness, continuing to obtain intermediate brightness between the highest brightness of the display screen and the second display brightness, determining the intermediate brightness as updated second display brightness until the light leakage value sensed by the light sensor is not 0, and determining the first light leakage value which is not 0 as the second light leakage value.
Because, in some cases, the light sensor cannot sense light leakage under the condition that the brightness of the display screen is lower than a certain brightness value, two non-0 light leakage values are adopted here, so that the accuracy of a fitting equation is improved. In summary, in the implementation of the present application, when the detected light leakage value of the current second display brightness is 0, the intermediate brightness value between the current second display brightness and the highest brightness value is taken as the next second display brightness, and the second light leakage value is detected until the second light leakage value which is not zero is detected.
The first light leakage value sensed by the light sensor can be detected when the display screen displays first brightness, and the second light leakage value sensed by the light sensor when the display screen displays second brightness. If the light leakage value cannot be sensed at the highest brightness of the display screen, it can be judged that no light leakage occurs.
And a fitting equation representing the corresponding relation between the display brightness of the display screen and the light leakage value of the display screen can be determined by adopting fitting modes and the like.
The display brightness of the current display screen can be substituted into the determined corresponding relation equation, and the light leakage value of the display brightness of the current display screen is determined.
In one embodiment, determining the correspondence relationship according to the first display luminance, the first light leakage value, the second display luminance, and the second light leakage value includes:
taking the first display brightness and the first light leakage value as first fitting coordinates;
taking the second display brightness and the second light leakage value as second fitting coordinates;
and carrying out linear equation fitting based on the first fitting coordinate and the second fitting coordinate to obtain a linear equation representing the corresponding relation.
The display brightness of the display screen and the light leakage value of the display screen generally show a linear relationship as shown in fig. 2a or fig. 2 b. The display screen display luminance in fig. 2a and 2b may be a display screen display luminance level.
Here, in the two-dimensional coordinate system with the display brightness of the display screen and the light leakage value of the display screen as coordinate axes, when the first display brightness is taken as an abscissa in the two-dimensional coordinate system, the first light leakage value of the display screen sensed by the light sensor at the first display brightness is taken as an ordinate in the two-dimensional coordinate system, so as to obtain a coordinate value of a point, and the coordinate value can be a first fitting coordinate.
Here, in the two-dimensional coordinate system with the display brightness of the display screen and the light leakage value of the display screen as coordinate axes, when the second display brightness is taken as the abscissa in the two-dimensional coordinate system, the second light leakage value of the display screen sensed by the light sensor during the second display brightness is taken as the ordinate in the two-dimensional coordinate system, so as to obtain the coordinate value of another point, where the coordinate value may be the second fitting coordinate.
And determining the axiom of a straight line according to the two points. And determining a linear equation determined by the first fitting coordinate and the second fitting coordinate as a fitting equation representing the corresponding relation between the display brightness of the display screen and the light leakage value of the display screen.
Therefore, according to the fitting equation of the corresponding relation between the display brightness of the current display screen and the light leakage value of the display screen, the light leakage value of the display brightness of the current display screen can be determined.
In practical application, the fitting equation of the corresponding relation between the display brightness of the display screen and the light leakage value of the display screen of each mobile phone may be different, and by adopting the corresponding relation fitting equation determining method provided by the embodiment of the invention, the speed of determining the fitting equation of the corresponding relation between the display brightness of the display screen and the light leakage value can be improved, so that the efficiency of compensating the first light sensation value is improved.
In one embodiment, a display screen with first display brightness is placed in a dark box environment, and a first light leakage value of the display screen is detected through a light sensor;
when the display screen displays the second display brightness, detecting a second light leakage value of the display screen, including: and placing the display screen with the second display brightness in a camera bellows environment, and detecting a second light leakage value of the display screen through a light sensor.
Here, the camera-box environment may be a kind of dark environment for light testing, in which the ambient light is isolated from the outside to reduce the influence of the ambient light on the light sensor.
The first light leakage value and the second light leakage value are sensed in the dark box environment, the influence of other light rays on the light sensor can be reduced, the sensing precision of the first light leakage value and the second light leakage value is improved, and the accuracy of a corresponding relation equation of the display brightness and the light leakage value of the display screen is improved.
In practical application, the first light leakage value and the second light leakage value can be sensed in the camera bellows environment in the mobile phone production process, and then a fitting equation of the corresponding relation between the display brightness of the display screen and the light leakage value of the display screen is determined. And in the subsequent testing or using process of the mobile phone, determining the current light leakage value by adopting a fitting equation of the corresponding relation between the display brightness of the display screen and the light leakage value of the display screen.
In one embodiment, obtaining, by the light sensor, a first light sensation value of the current environment includes:
acquiring a first light sensation value of the current environment through an nth light sensation channel of the light sensor, wherein N is a positive integer smaller than N, N is the total number of the light sensation channels, and the wavelengths of light rays corresponding to different light sensation channels are different;
according to the pre-established corresponding relation between the display brightness of the display screen and the light leakage value of the display screen, determining the light leakage value of the current display brightness of the display screen comprises the following steps:
according to the corresponding relation between the display brightness of the display screen and the light leakage value of the nth photosensitive channel, determining the light leakage value of the current display brightness of the display screen in the nth photosensitive channel;
adopting the light leakage value of the current display brightness of the display screen to compensate the first light sensation value, determining the compensated first light sensation value as the current environment light brightness, and comprising the following steps:
And compensating the first light sensation value of the nth light sensation channel by utilizing the light leakage value of the current display brightness of the display screen in the nth light sensation channel, and determining the compensated first light sensation value of the nth light sensation channel as the ambient light brightness of the current environment in the nth light sensation channel.
The light sensor may have various types of light sensing channels, such as: the light sensor can have both a visible light sensitive channel and an infrared light sensitive channel.
In the embodiment of the disclosure, the corresponding relation between the display brightness of the display screen and the light leakage value of the light leakage of the display screen received by each photosensitive channel can be used for determining the light leakage value received by each photosensitive channel under the display brightness of the current display screen, the light leakage value received by each photosensitive channel under the display brightness of the current display screen is adopted to respectively compensate the first light induction value induced by each photosensitive channel of the light sensor, so that the ambient light brightness of the current environment in each photosensitive channel is obtained, and the ambient light brightness of each photosensitive channel is further used as the basis for adjusting the display brightness of the display screen.
In the embodiment of the disclosure, the brightness of the environment corresponding to one or more light-sensing channels (for example, one visible light-sensing channel) of the same type may be used as the basis for adjusting the display brightness of the display screen, or the brightness of the environment corresponding to one or more light-sensing channels (for example, one visible light-sensing channel and one infrared light-sensing channel, or two visible light-sensing channels and three infrared light-sensing channels) of different types may be used as the basis for adjusting the display brightness of the display screen.
Preferably, the current display brightness of the display screen can be set by a user, and can be automatically adjusted through a controller in the mobile terminal.
Further, for a scheme of adjusting display brightness of a display screen by combining a plurality of photosensitive channels, in the embodiment of the disclosure, according to a preset combination rule (such as a rule of overlapping to obtain an average value, etc.), the ambient light brightness of M photosensitive channels after compensation is combined into a current ambient light brightness, and then the display brightness of the display screen is adjusted by combining and compensating the current ambient light brightness, where M is a positive integer less than or equal to N.
In this embodiment of the present disclosure, the first light sensation values measured by the light sensation channels may be combined before the first light sensation values measured by the light sensation channels are compensated to obtain the corresponding ambient light luminance under the light sensation channels, and then the light leakage value of the light sensor is used to compensate the combined first light sensation values to obtain the ambient light luminance under the current environment.
Different light sensors generally adopt different combination modes, the first light sensation values corresponding to different light sensing channels are combined into the first light sensation values of the light sensors, and partial or all light sensation values sensed by the light sensing channels can be selected according to actual requirements to be combined.
Taking the example that the light sensor has two light sensing channels, the combination manner of the first light sensing values sensed by the two light sensing channels can be expressed by expression (1):
Lux＝a*((b*CH1)-(c*CH2))/(ATime*AGain) (1)
wherein, lux represents a first light sensation value sensed by the light sensor, CH1 represents a first light sensation value sensed by a 1 st light sensing channel in the light sensor, CH2 represents a first light sensation value sensed by a 2 nd light sensing channel in the light sensor, ATime represents an integration time of the light sensation value sensed by the light sensor corresponding to the light sensing channel, AGain represents a magnification factor of the light sensor, and a, b and c respectively represent constants determined by characteristics of the light sensor.
In the embodiment of the disclosure, as corresponding combination modes or combination rules are set according to different characteristics of different light sensing channels in the light sensor, the compensated ambient light brightness is closer to a real value, and the compensation precision of the ambient light brightness is greatly improved.
A specific example is provided below in connection with any of the embodiments described above:
in the actual production test process, the mobile phone test can be performed by adopting the method provided by the embodiment of the invention.
Through a number of tests, it was determined that the LCD light leakage value was linearly related to the backlight brightness, as shown in fig. 2a and 2 b.
Specific steps of the mobile phone test, as shown in fig. 3, may include:
step 301: closing a display screen of the mobile phone to calibrate an ambient light source
Step 302: firstly, the backlight of the display screen is opened to the maximum in the camera bellows, the light leakage value is read, and then the light leakage value of the second point is read by a dichotomy method, so that a straight line can be drawn: y=kx+b; wherein: y represents the light leakage value, x represents the LCD backlight luminance, k represents the slope of a straight line, and b represents the offset value. If there is no light leakage, step 304 is performed.
Step 303: and the light sensation value of the light sensor is compensated by actually using the corresponding light leakage value of each backlight level, so that the external actual ambient brightness is accurately determined. And performs step 304.
Step 304: and adopting a stable light source to perform dimming test on the display screen.
The compensation method can be further optimized, and the light sensation value of the light sensor is determined by a calculation formula of the light sensation value of each light sensing channel of the light sensor, such as the calculation formula expressed by the expression (1). The light sensation value of each photosensitive channel can be compensated, and the compensated ambient light brightness can be determined by the compensated light sensation value of each photosensitive channel through a calculation formula. The compensation is carried out from the source, so that the compensation is more accurate.
Fig. 4 is a block diagram illustrating an ambient light compensation device 200 according to an exemplary embodiment. Referring to fig. 4, the apparatus includes: an acquisition module 210, a first determination module 220, and a compensation module 230, wherein,
the obtaining module 210 is configured to obtain a first light sensation value of the current environment through a light sensor;
the first determining module 220 is configured to determine a light leakage value of the current display brightness of the display screen according to a pre-established correspondence between the display brightness of the display screen and the light leakage value of the display screen;
the compensation module 230 is configured to compensate the first light sensation value by using the light leakage value of the current display brightness of the display screen, and determine the compensated first light sensation value as the current ambient light brightness.
In one embodiment, as shown in fig. 5, the apparatus further comprises: a second determining module 240, configured to determine a correspondence between display brightness of the display screen and a light leakage value of the display screen;
the second determining module 240 is specifically configured to:
detecting a first light leakage value of the display screen when the display screen displays first display brightness;
detecting a second light leakage value of the display screen when the display screen displays second display brightness;
And determining the corresponding relation according to the first display brightness, the first light leakage value, the second display brightness and the second light leakage value.
In one embodiment, as shown in fig. 6, the second determining module 240 includes: a first determining sub-module 241, configured to take the first display brightness and the first light leakage value as a first fit coordinate; taking the second display brightness and the second light leakage value as second fitting coordinates; and performing linear equation fitting based on the first fitting coordinate and the second fitting coordinate to obtain a linear equation representing the corresponding relation.
In one embodiment, as shown in fig. 6, the second determining module 240 includes:
the first detection sub-module 242 is configured to place the display screen with the first display brightness in a dark box environment, and detect a first light leakage value of the display screen through the light sensor;
the second detection sub-module 243 is configured to place the display screen with the second display brightness in a dark box environment, and detect a second light leakage value of the display screen through the light sensor.
In one embodiment, as shown in fig. 7, the obtaining module 210 includes:
The obtaining sub-module 211 is configured to obtain a first light sensation value of the current environment through an nth light sensation channel of the light sensor, where N is a positive integer smaller than N, N is a total number of light sensation channels, and wavelengths of light rays corresponding to different light sensation channels are different;
the first determining module 220 includes:
a second determining submodule 221, configured to determine a light leakage value of the current display brightness of the display screen in the nth photosensitive channel according to a corresponding relationship between the display brightness of the display screen and the light leakage value of the nth photosensitive channel;
the compensation module 230 includes:
and the compensation sub-module 231 is configured to compensate the first light sensation value of the nth light sensation channel by using the light leakage value of the display screen at the nth light sensation channel, and determine the compensated first light sensation value of the nth light sensation channel as the ambient light brightness of the current environment at the nth light sensation channel.
In one embodiment, as shown in fig. 8, the apparatus 200 further includes:
the combination module 250 is configured to preset a combination rule, and combine the ambient light intensities corresponding to the compensated M photosensitive channels into the current ambient light intensity, where M is a positive integer less than or equal to N.
The specific manner in which the various modules perform the operations in the apparatus of the above embodiments have been described in detail in connection with the embodiments of the method, and will not be described in detail herein.
In an exemplary embodiment, the acquisition module 210, the first determination module 220, the compensation module 230, the second determination module 240, the combination module 250, and the like may be implemented by one or more central processing units (CPU, central Processing Unit), graphics processors (GPU, graphics Processing Unit), baseband processors (BP, baseband processor), application specific integrated circuits (ASIC, application Specific Integrated Circuit), DSPs, programmable logic devices (PLD, programmable Logic Device), complex programmable logic devices (CPLD, complex Programmable Logic Device), field programmable gate arrays (FPGA, field-Programmable Gate Array), general purpose processors, controllers, microcontrollers (MCU, micro Controller Unit), microprocessors (Microprocessor), or other electronic components for performing the aforementioned methods.
Fig. 9 is a block diagram illustrating an apparatus 800 for ambient light compensation, according to an example embodiment. For example, apparatus 800 may be a mobile phone, computer, digital broadcast terminal, messaging device, game console, tablet device, medical device, exercise device, personal digital assistant, or the like.
Referring to fig. 9, apparatus 800 may include one or more of the following components: a processing component 802, a memory 804, a power component 806, a multimedia component 808, an audio component 810, an input/output (I/O) interface 812, a sensor component 814, and a communication component 816.
The processing component 802 generally controls overall operation of the apparatus 800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 802 may include one or more processors 820 to execute instructions to perform all or part of the steps of the methods described above. Further, the processing component 802 can include one or more modules that facilitate interactions between the processing component 802 and other components. For example, the processing component 802 can include a multimedia module to facilitate interaction between the multimedia component 808 and the processing component 802.
The memory 804 is configured to store various types of data to support operations at the apparatus 800. Examples of such data include instructions for any application or method operating on the device 800, contact data, phonebook data, messages, pictures, videos, and the like. The memory 804 may be implemented by any type or combination of volatile or nonvolatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk.
The power supply component 806 provides power to the various components of the device 800. The power components 806 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for the device 800.
The multimedia component 808 includes a screen between the device 800 and the user that provides an output interface. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from a user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensor may sense not only the boundary of a touch or slide action, but also the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front camera and/or a rear camera. The front camera and/or the rear camera may receive external multimedia data when the apparatus 800 is in an operational mode, such as a photographing mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have focal length and optical zoom capabilities.
The audio component 810 is configured to output and/or input audio signals. For example, the audio component 810 includes a Microphone (MIC) configured to receive external audio signals when the device 800 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may be further stored in the memory 804 or transmitted via the communication component 816. In some embodiments, audio component 810 further includes a speaker for outputting audio signals.
The I/O interface 812 provides an interface between the processing component 802 and peripheral interface modules, which may be a keyboard, click wheel, buttons, etc. These buttons may include, but are not limited to: homepage button, volume button, start button, and lock button.
The sensor assembly 814 includes one or more sensors for providing status assessment of various aspects of the apparatus 800. For example, the sensor assembly 814 may detect an on/off state of the device 800, a relative positioning of the components, such as a display and keypad of the device 800, the sensor assembly 814 may also detect a change in position of the device 800 or a component of the device 800, the presence or absence of user contact with the device 800, an orientation or acceleration/deceleration of the device 800, and a change in temperature of the device 800. The sensor assembly 814 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an acceleration sensor, a gyroscopic sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component 816 is configured to facilitate communication between the apparatus 800 and other devices, either in a wired or wireless manner. The device 800 may access a wireless network based on a communication standard, such as WiFi,2G or 3G, or a combination thereof. In one exemplary embodiment, the communication component 816 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, the communication component 816 further includes a Near Field Communication (NFC) module to facilitate short range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, ultra Wideband (UWB) technology, bluetooth (BT) technology, and other technologies.
In an exemplary embodiment, the apparatus 800 may be implemented by one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital Signal Processing Devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic elements for executing the methods described above.
In an exemplary embodiment, a non-transitory computer readable storage medium is also provided, such as memory 804 including instructions executable by processor 820 of apparatus 800 to perform the above-described method. For example, the non-transitory computer readable storage medium may be ROM, random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.
Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It is to be understood that the application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (6)
1. A method of ambient light compensation, comprising:
pre-establishing a corresponding relation between display brightness of a display screen and a light leakage value of the display screen; the pre-establishing a correspondence between display brightness of the display screen and a light leakage value of the display screen includes: detecting a first light leakage value of the display screen when the display screen displays first display brightness; detecting a second light leakage value of the display screen when the display screen displays second display brightness; taking the first display brightness and the first light leakage value as a first fitting coordinate; taking the second display brightness and the second light leakage value as second fitting coordinates; based on the first fitting coordinate and the second fitting coordinate, fitting a linear equation to obtain a linear equation representing the corresponding relation;
Acquiring a first light sensation value of the current environment through a light sensor; the method for obtaining the first light sensation value of the current environment through the light sensor comprises the following steps: acquiring a first light sensation value of the current environment through an nth light sensation channel of the light sensor, wherein N is a positive integer smaller than N, N is the total number of the light sensation channels, and the wavelengths of light rays corresponding to different light sensation channels are different;
determining a light leakage value of the current display brightness of the display screen according to a pre-established corresponding relation between the display brightness of the display screen and the light leakage value of the display screen; the determining the light leakage value of the current display brightness of the display screen according to the pre-established corresponding relation between the display brightness of the display screen and the light leakage value of the display screen comprises the following steps: according to the corresponding relation between the display brightness of the display screen and the light leakage value of the nth photosensitive channel, determining the light leakage value of the current display brightness of the display screen in the nth photosensitive channel;
the first light sensation value is compensated by adopting the light leakage value of the current display brightness of the display screen, and the compensated first light sensation value is determined as the current environment brightness; the step of compensating the first light sensation value by adopting the light leakage value of the current display brightness of the display screen, determining the compensated first light sensation value as the current environment light brightness comprises the following steps: compensating the first light sensation value of the nth light sensation channel by utilizing the light leakage value of the current display brightness of the display screen in the nth light sensation channel, and determining the compensated first light sensation value of the nth light sensation channel as the ambient light brightness of the current environment in the nth light sensation channel;
According to a preset combination rule, combining the ambient light brightness corresponding to each of the M compensated photosensitive channels into the current ambient light brightness, wherein M is a positive integer less than or equal to N; the M is a plurality of.
2. The method of claim 1, wherein the step of determining the position of the substrate comprises,
when the display screen displays the first display brightness, detecting a first light leakage value of the display screen, including: placing the display screen with the first display brightness in a dark box environment, and detecting a first light leakage value of the display screen through the light sensor;
and detecting a second light leakage value of the display screen when the display screen displays the second display brightness, including: and placing the display screen with the second display brightness in a dark box environment, and detecting a second light leakage value of the display screen through the light sensor.
3. An ambient light compensation device, comprising: the system comprises an acquisition module, a first determination module, a second determination module, a compensation module and a combination module, wherein,
the second determining module is used for determining the corresponding relation between the display brightness of the display screen and the light leakage value of the display screen in advance; the second determining module is specifically configured to: detecting a first light leakage value of the display screen when the display screen displays first display brightness; detecting a second light leakage value of the display screen when the display screen displays second display brightness; the second determining module comprises a first determining sub-module; the first determining submodule is used for taking the first display brightness and the first light leakage value as first fitting coordinates; taking the second display brightness and the second light leakage value as second fitting coordinates; based on the first fitting coordinate and the second fitting coordinate, fitting a linear equation to obtain a linear equation representing the corresponding relation;
The acquisition module is used for acquiring a first light sensation value of the current environment by acquiring the light sensor; the acquisition module comprises: the acquisition sub-module is used for acquiring a first light sensation value of the current environment through an nth light sensation channel of the light sensor, wherein N is a positive integer smaller than N, N is the total number of the light sensation channels, and the wavelengths of light rays corresponding to different light sensation channels are different;
the first determining module is used for determining a light leakage value of the current display brightness of the display screen according to a pre-established corresponding relation between the display brightness of the display screen and the light leakage value of the display screen; the first determining module includes: the second determining submodule is used for determining the light leakage value of the current display brightness of the display screen in the nth photosensitive channel according to the corresponding relation between the display brightness of the display screen and the light leakage value of the nth photosensitive channel;
the compensation module is used for compensating the first light sensation value by adopting the light leakage value of the current display brightness of the display screen, and determining the compensated first light sensation value as the current environment brightness; the compensation module comprises: the compensation sub-module is used for compensating the first light sensation value of the nth light sensation channel by utilizing the light leakage value of the current display brightness of the display screen in the nth light sensation channel, and determining the compensated first light sensation value of the nth light sensation channel as the ambient light brightness of the current environment in the nth light sensation channel;
The combination module is used for combining the ambient light brightness corresponding to each of the M compensated photosensitive channels into the current ambient light brightness according to a preset combination rule, wherein M is a positive integer less than or equal to N; the M is a plurality of.
4. The apparatus of claim 3, wherein the second determining module comprises:
the first detection submodule is used for placing the display screen with the first display brightness in a camera bellows environment and detecting a first light leakage value of the display screen through the light sensor;
and the second detection submodule is used for placing the display screen with the second display brightness in a camera bellows environment and detecting a second light leakage value of the display screen through the light sensor.
5. A terminal comprising a processor, a memory and an executable program stored on the memory and capable of being run by the processor, characterized in that the processor performs the steps of the ambient light compensation method according to any one of claims 1 to 2 when running the executable program.
6. A storage medium having stored thereon an executable program, which when executed by a processor, implements the steps of the ambient light compensation method according to any one of claims 1 to 2.
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