CN105374339A - Method and system for automatically adjusting brightness of display screen by intelligent terminal - Google Patents
Method and system for automatically adjusting brightness of display screen by intelligent terminal Download PDFInfo
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Abstract
The invention discloses a method and a system for automatically adjusting the brightness of a display screen by an intelligent terminal. The method comprises the steps of obtaining the light intensity around the display screen of the intelligent terminal through a photosensitive sensor; acquiring a face distance between a face and an intelligent terminal display screen through an infrared distance measuring sensor; and adjusting the brightness of the display screen according to the light intensity and the face distance. According to the invention, the brightness of the display screen of the intelligent terminal is automatically adjusted by acquiring the light intensity around the intelligent terminal and the distance between a person and the display screen, the brightness of the display screen of the intelligent terminal is adjusted according to the change of the light intensity and the distance between the person and the face, manual adjustment is not needed, the use is convenient, when the brightness of the display screen of the intelligent terminal is too strong, the consumption of the electric quantity of a battery can be reduced by automatically reducing the brightness of the display screen of the intelligent terminal, and the standby time and the use time of the intelligent terminal are prolonged.
Description
Technical field
The present invention relates to intelligent terminal display screen field, particularly relate to the method and system that a kind of intelligent terminal regulates brightness of display screen automatically.
Background technology
Under intelligent terminal is placed in high light (under sunlight, outdoor etc.) or when people is distant from the distance of display screen, can seems under the brightness conditions of former setting dimer, even cannot see the display of display screen clearly.And under being placed in the low light level or when people is closer from the distance of display screen, can seeming under the brightness conditions of former setting brighter, even can seem more dazzling.
The brightness of existing intelligent terminal display screen is fixing, or needs the brightness of manual adjustments display screen, automatically cannot regulate the brightness of display screen according to ambient light intensity and people from the distance of display screen.
Summary of the invention
The object of the present invention is to provide a kind of intelligent terminal automatically to regulate the method and system of brightness of display screen, the present invention regulates the brightness of display screen automatically from the distance of display screen according to the light intensity around intelligent terminal and people.
For reaching this object, the present invention by the following technical solutions:
Intelligent terminal regulates a method for brightness of display screen automatically, comprising:
The light intensity around intelligent terminal display screen is obtained by light sensor;
The face distance between face and intelligent terminal display screen is obtained by infrared distance sensor;
According to described light intensity and described face distance, regulate the brightness of described display screen.
Wherein, the brightness of the described display screen of described adjustment, comprising: by changing the dutycycle controlling the PWM waveform high level that described brightness of display screen regulates, regulate the brightness of described display screen.
Wherein, described according to described light intensity and described face distance, regulate the brightness of described display screen, comprising:
Divided light line strength is interval, arranges the duty cycle range of the interval corresponding high level of light intensity;
Divide between face distance regions, the dutycycle added value of high level corresponding between face distance regions is set;
Determine that the light intensity belonging to described light intensity is interval, extract the duty cycle range of the interval corresponding high level of this light intensity;
Determine that described face is apart between affiliated face distance regions, extract the dutycycle added value of high level corresponding between this face distance regions;
The minimum value of the duty cycle range of the described high level extracted is added the dutycycle added value of the described high level of extraction, obtain current high level dutycycle, the duty cycle adjustment of high level to described current high level dutycycle.
Wherein, described according to described light intensity and described face distance, regulate the brightness of described display screen, comprising:
Divided light line strength is interval, arranges the value of the dutycycle of the interval corresponding high level of light intensity;
Divide between face distance regions, the dutycycle added value of high level corresponding between face distance regions is set;
Determine that the light intensity belonging to described light intensity is interval, extract the value of the dutycycle of the interval corresponding high level of this light intensity;
Determine that described face is apart between affiliated face distance regions, extract the dutycycle added value of high level corresponding between this face distance regions;
The value of the dutycycle of the described high level extracted is added the dutycycle added value of the described high level of extraction, obtain current high level dutycycle, the duty cycle adjustment of high level to described current high level dutycycle.
Wherein, described according to described light intensity and described face distance, regulate the brightness of described display screen, comprising:
Divided light line strength is interval, arranges the value of the dutycycle of the interval corresponding high level of light intensity;
Determine that the light intensity belonging to described light intensity is interval, extract the value of the dutycycle of the interval corresponding high level of this light intensity;
The linear ratio relation of face distance and the dutycycle added value of high level is set;
Extract the dutycycle added value of high level corresponding to described face distance;
The value of the dutycycle of the described high level extracted is added the dutycycle added value of the described high level of extraction, obtain current high level dutycycle, the duty cycle adjustment of high level to described current high level dutycycle.
Intelligent terminal regulates a system for brightness of display screen automatically, comprising:
First acquisition module, for obtaining the light intensity around intelligent terminal display screen by light sensor;
Second acquisition module, for obtaining the face distance between face and intelligent terminal display screen by infrared distance sensor;
Luminance adjustment module, for according to described light intensity and described face distance, regulates the brightness of described display screen.
Wherein, described luminance adjustment module, specifically for: according to described light intensity and described face distance, by changing the dutycycle controlling the PWM waveform high level that described brightness of display screen regulates, regulate the brightness of described display screen.
Wherein, described luminance adjustment module, comprising:
First divides module, interval for divided light line strength, arranges the duty cycle range of the interval corresponding high level of light intensity;
Second divides module, for dividing between face distance regions, arranges the dutycycle added value of high level corresponding between face distance regions;
First extraction module, interval for determining the light intensity belonging to described light intensity, extract the duty cycle range of the interval corresponding high level of this light intensity;
First extraction module, for determining that described face is apart between affiliated face distance regions, extracts the dutycycle added value of high level corresponding between this face distance regions;
First computing module, the minimum value for the duty cycle range by the described high level extracted adds the dutycycle added value of the described high level of extraction, obtains current high level dutycycle, the duty cycle adjustment of high level to described current high level dutycycle.
Wherein, described luminance adjustment module, comprising:
3rd divides module, interval for divided light line strength, arranges the value of the dutycycle of the interval corresponding high level of light intensity;
4th divides module, for dividing between face distance regions, arranges the dutycycle added value of high level corresponding between face distance regions;
3rd extraction module, interval for determining the light intensity belonging to described light intensity, extract the value of the dutycycle of the interval corresponding high level of this light intensity;
4th extraction module, for determining that described face is apart between affiliated face distance regions, extracts the dutycycle added value of high level corresponding between this face distance regions;
Second computing module, the value for the dutycycle by the described high level extracted adds the dutycycle added value of the described high level of extraction, obtains current high level dutycycle, the duty cycle adjustment of high level to described current high level dutycycle.
Wherein, described luminance adjustment module, comprising:
5th divides module, interval for divided light line strength, arranges the value of the dutycycle of the interval corresponding high level of light intensity;
5th extraction module, interval for determining the light intensity belonging to described light intensity, extract the value of the dutycycle of the interval corresponding high level of this light intensity;
Linearly module is set, for arranging the linear ratio relation of face distance and the dutycycle added value of high level;
6th extraction module, for extracting the dutycycle added value of high level corresponding to described face distance;
3rd computing module, the value for the dutycycle by the described high level extracted adds the dutycycle added value of the described high level of extraction, obtains current high level dutycycle, the duty cycle adjustment of high level to described current high level dutycycle.
Beneficial effect of the present invention is: the invention discloses the method and system that a kind of intelligent terminal regulates brightness of display screen automatically.The method comprises the light intensity around by light sensor acquisition intelligent terminal display screen; The face distance between face and intelligent terminal display screen is obtained by infrared distance sensor; According to described light intensity and described face distance, regulate the brightness of described display screen.The present invention to regulate the brightness of display screen automatically from the distance of display screen by obtaining light intensity around intelligent terminal and people, according to the change of light intensity and face distance, regulate the brightness of described intelligent terminal display screen, do not need manual adjustments, easy to use, when the brightness of intelligent terminal display screen is too strong, the brightness automatically turning down this intelligent terminal display screen can reduce the consumption of battery electric quantity, extends the standby and service time of intelligent terminal.
Accompanying drawing explanation
Fig. 1 is the method flow diagram that a kind of intelligent terminal that the embodiment of the present invention one provides regulates the method for brightness of display screen automatically.
Fig. 2 is the method flow diagram that a kind of intelligent terminal that the embodiment of the present invention two provides regulates the method for brightness of display screen automatically.
Fig. 3 is the method flow diagram that a kind of intelligent terminal that the embodiment of the present invention three provides regulates the method for brightness of display screen automatically.
Fig. 4 is the method flow diagram that a kind of intelligent terminal that the embodiment of the present invention four provides regulates the method for brightness of display screen automatically.
Fig. 5 is the block diagram that a kind of intelligent terminal that the embodiment of the present invention five provides regulates the system of brightness of display screen automatically.
Fig. 6 is the block diagram that a kind of intelligent terminal that the embodiment of the present invention six provides regulates the system of brightness of display screen automatically.
Fig. 7 is the block diagram that a kind of intelligent terminal that the embodiment of the present invention seven provides regulates the system of brightness of display screen automatically.
Fig. 8 is the block diagram that a kind of intelligent terminal that the embodiment of the present invention eight provides regulates the system of brightness of display screen automatically.
Embodiment
Technical scheme of the present invention is further illustrated by embodiment below in conjunction with accompanying drawing.
Embodiment one
As shown in Figure 1, the present embodiment provides a kind of intelligent terminal automatically to regulate the method for brightness of display screen, comprising:
S101, obtains the light intensity around intelligent terminal display screen by light sensor.
S102, obtains the face distance between face and intelligent terminal display screen by infrared distance sensor.
In the present embodiment, light sensor and infrared distance sensor are arranged on directly over intelligent terminal display screen, and wherein light sensor is used for testing the light intensity around intelligent terminal, and infrared distance sensor is used for the distance of test person from display screen.
S103, according to described light intensity and described face distance, regulates the brightness of described display screen.
A kind of intelligent terminal that the present embodiment provides regulates the method for brightness of display screen automatically, automatically to regulate the brightness of display screen from the distance of display screen by obtaining light intensity around intelligent terminal and people, according to the change of light intensity and face distance, regulate the brightness of described intelligent terminal display screen, do not need manual adjustments, easy to use, when the brightness of intelligent terminal display screen is too strong, automatically the brightness turning down this intelligent terminal display screen can reduce the consumption of battery electric quantity, extends the standby and service time of intelligent terminal.
Embodiment two
Corresponding with embodiment one, the present embodiment mainly sets forth the concrete grammar realizing the brightness regulating described display screen according to described light intensity and described face distance.
As shown in Figure 2, a kind of intelligent terminal regulates the method for brightness of display screen automatically, comprising:
S201, obtains the light intensity around intelligent terminal display screen by light sensor.
S202, obtains the face distance between face and intelligent terminal display screen by infrared distance sensor.
In the present embodiment, light sensor and infrared distance sensor are arranged on directly over intelligent terminal display screen, and wherein light sensor is used for testing the light intensity around intelligent terminal, and infrared distance sensor is used for the distance of test person from display screen.
In the present embodiment, according to described light intensity and described face distance, by changing the dutycycle controlling the PWM waveform high level that described brightness of display screen regulates, regulate the brightness of described display screen.Main elaboration below obtains the method for the dutycycle of current high level.
S203, divided light line strength is interval, arranges the duty cycle range of the interval corresponding high level of light intensity.
Concrete, the present invention is divided into 10 light intensity intervals, the duty cycle range of high level corresponding different respectively:
S204, divides between face distance regions, arranges the dutycycle added value of high level corresponding between face distance regions.
Concrete, segment again between 10 face distance regions under each light intensity interval, the dutycycle added value of high level corresponding different respectively:
S205, determines that the light intensity belonging to described light intensity is interval, extracts the duty cycle range of the interval corresponding high level of this light intensity.
S206, determines that described face is apart between affiliated face distance regions, extracts the dutycycle added value of high level corresponding between this face distance regions.
S207, adds the dutycycle added value of the described high level of extraction, obtains current high level dutycycle, the duty cycle adjustment of high level to described current high level dutycycle by the minimum value of the duty cycle range of the described high level extracted.
Concrete, if light intensity is 300 luxs, face distance is 30 centimetres, the duty cycle range of then corresponding high level is 41% ~ 50%, the dutycycle added value of high level is 6%, then can obtain current high level dutycycle should be 41% add 6%, equals 47%, need by the duty cycle adjustment of high level to 47%.
Concrete, according to described light intensity and described face distance, by changing the dutycycle controlling the PWM waveform high level that described brightness of display screen regulates, regulate the brightness of described display screen.Display backlight driver module adopts constant voltage type of drive, and it realizes by the drive current exporting different size the object regulating brightness of display screen.CPU control module exports the PWM waveform of duty ratio corresponding according to testing the light intensity value that arrives and the people distance from display screen, this PWM Waveform Control backlight drive module exports the drive current of corresponding size, and then regulates the brightness of display screen.When detecting that light intensity enhancing and people are away from the distance change of display screen, the high level dutycycle of the PWM waveform that CPU exports reduces, and backlight drive module output driving current is become greatly, and then the brightness of display screen is strengthened.When detect light intensity weaken and people from display screen distance become close to time, CPU export PWM waveform high level dutycycle increase, backlight drive module output driving current is diminished, and then the brightness of display screen is died down.
In the present embodiment, be divided into 10 light intensity intervals, often increase a light intensity interval, the dutycycle of corresponding high level increases by 10%.And segmented again under each light intensity interval between 10 face distance regions, under each light intensity interval, often increase between a face distance regions, the corresponding increase by 1% of brightness of display screen.Achieve the brightness regulation of 100 grades of display screens like this.Generally speaking, be equivalent to that light intensity affects the dutycycle of high level 90%, and face distance affects 10% of the dutycycle of high level.
Embodiment three
The difference of the present embodiment and embodiment two is the computing method of the dutycycle of current high level, be embodied in different light intensity interval corresponding be the value of the dutycycle of concrete high level, an instead of scope.
As shown in Figure 3, a kind of intelligent terminal regulates the method for brightness of display screen automatically, comprising:
S301, obtains the light intensity around intelligent terminal display screen by light sensor.
S302, obtains the face distance between face and intelligent terminal display screen by infrared distance sensor.
In the present embodiment, according to described light intensity and described face distance, by changing the dutycycle controlling the PWM waveform high level that described brightness of display screen regulates, regulate the brightness of described display screen.Main elaboration below obtains the method for the dutycycle of current high level.
S303, divided light line strength is interval, arranges the value of the dutycycle of the interval corresponding high level of light intensity.
Concrete, the present invention is divided into 10 light intensity intervals, the value of the dutycycle of high level corresponding different respectively:
S304, divides between face distance regions, arranges the dutycycle added value of high level corresponding between face distance regions.
Concrete, segment again between 10 face distance regions under each light intensity interval, the dutycycle added value of high level corresponding different respectively:
S305, determines that the light intensity belonging to described light intensity is interval, extracts the value of the dutycycle of the interval corresponding high level of this light intensity.
S306, determines that described face is apart between affiliated face distance regions, extracts the dutycycle added value of high level corresponding between this face distance regions.
S307, adds the dutycycle added value of the described high level of extraction, obtains current high level dutycycle, the duty cycle adjustment of high level to described current high level dutycycle by the value of the dutycycle of the described high level extracted.
Concrete, if light intensity is 300 luxs, face distance is 30 centimetres, the duty cycle range of then corresponding high level is 41%, the dutycycle added value of high level is 6%, then can obtain current high level dutycycle should be 41% add 6%, equals 47%, need by the duty cycle adjustment of high level to 47%.
In the present embodiment, CPU control module according to test to light intensity value and people export the PWM waveform of the dutycycle of corresponding high level from the distance of display screen, this PWM Waveform Control backlight drive module exports the drive current of corresponding size, and then regulates the brightness of display screen.
The present embodiment to regulate the brightness of display screen automatically from the distance of display screen by obtaining light intensity around intelligent terminal and people, according to the change of light intensity and face distance, regulate the brightness of described intelligent terminal display screen, do not need manual adjustments, easy to use, when the brightness of intelligent terminal display screen is too strong, the brightness automatically turning down this intelligent terminal display screen can reduce the consumption of battery electric quantity, extends the standby and service time of intelligent terminal.
Embodiment four
The difference of the present embodiment and embodiment two is the computing method of the dutycycle of current high level, be embodied in different light intensity interval corresponding be the value of the dutycycle of concrete high level, an instead of scope; Face distance is not between setting area, and face distance is directly proportional to the dutycycle added value of high level.
As shown in Figure 4, a kind of intelligent terminal regulates the method for brightness of display screen automatically, comprising:
S401, obtains the light intensity around intelligent terminal display screen by light sensor.
S402, obtains the face distance between face and intelligent terminal display screen by infrared distance sensor.
In the present embodiment, according to described light intensity and described face distance, by changing the dutycycle controlling the PWM waveform high level that described brightness of display screen regulates, regulate the brightness of described display screen.Main elaboration below obtains the method for the dutycycle of current high level.
S403, divided light line strength is interval, arranges the value of the dutycycle of the interval corresponding high level of light intensity.
Concrete, the present invention is divided into 10 light intensity intervals, the value of the dutycycle of high level corresponding different respectively:
S404, determines that the light intensity belonging to described light intensity is interval, extracts the value of the dutycycle of the interval corresponding high level of this light intensity.
S405, arranges the linear ratio relation of face distance and the dutycycle added value of high level.
Preferably, arranging face distance with the linear ratio relation of the dutycycle added value of high level is:
Dutycycle added value=the 0.2x% of high level, wherein x is face distance, and the scope of x is 0 ~ 50 centimetre, and when face distance is greater than 50 centimetres, the dutycycle added value of high level is 10%.
S406, extracts the dutycycle added value of high level corresponding to described face distance.
S407, adds the dutycycle added value of the described high level of extraction, obtains current high level dutycycle, the duty cycle adjustment of high level to described current high level dutycycle by the value of the dutycycle of the described high level extracted.
Concrete, if light intensity is 300 luxs, face distance is 30 centimetres, the duty cycle range of then corresponding high level is 41%, the dutycycle added value of high level is 6%, then can obtain current high level dutycycle should be 41% add 6%, equals 47%, need by the duty cycle adjustment of high level to 47%.
In the present embodiment, CPU control module according to test to light intensity value and people export the PWM waveform of the dutycycle of corresponding high level from the distance of display screen, this PWM Waveform Control backlight drive module exports the drive current of corresponding size, and then regulates the brightness of display screen.
The present embodiment to regulate the brightness of display screen automatically from the distance of display screen by obtaining light intensity around intelligent terminal and people, according to the change of light intensity and face distance, regulate the brightness of described intelligent terminal display screen, do not need manual adjustments, easy to use, when the brightness of intelligent terminal display screen is too strong, the brightness automatically turning down this intelligent terminal display screen can reduce the consumption of battery electric quantity, extends the standby and service time of intelligent terminal.
Embodiment five
The corresponding embodiment one of the present embodiment, for detailed content can reference example one.
As shown in Figure 5, the present embodiment provides a kind of intelligent terminal automatically to regulate the system of brightness of display screen, comprising:
First acquisition module 510, for obtaining the light intensity around intelligent terminal display screen by light sensor.
Second acquisition module 520, for obtaining the face distance between face and intelligent terminal display screen by infrared distance sensor.
Luminance adjustment module 530, for according to described light intensity and described face distance, regulates the brightness of described display screen.
Described luminance adjustment module, specifically for: according to described light intensity and described face distance, by changing the dutycycle controlling the PWM waveform high level that described brightness of display screen regulates, regulate the brightness of described display screen.
A kind of intelligent terminal that the present embodiment provides regulates the system of brightness of display screen automatically, each module cooperative work above, automatically to regulate the brightness of display screen from the distance of display screen by obtaining light intensity around intelligent terminal and people, according to the change of light intensity and face distance, regulate the brightness of described intelligent terminal display screen, do not need manual adjustments, easy to use, when the brightness of intelligent terminal display screen is too strong, automatically the brightness turning down this intelligent terminal display screen can reduce the consumption of battery electric quantity, extends the standby and service time of intelligent terminal.
Embodiment six
The present embodiment is refinement luminance adjustment module on the basis of embodiment five, and the corresponding embodiment two of the present embodiment, for detailed content can reference example two.
As shown in Figure 6, the present embodiment provides a kind of intelligent terminal automatically to regulate the system of brightness of display screen, comprising:
First acquisition module 610, for obtaining the light intensity around intelligent terminal display screen by light sensor.
Second acquisition module 620, for obtaining the face distance between face and intelligent terminal display screen by infrared distance sensor.
First divides module 630, interval for divided light line strength, arranges the duty cycle range of the interval corresponding high level of light intensity.
Second divides module 640, for dividing between face distance regions, arranges the dutycycle added value of high level corresponding between face distance regions.
First extraction module 650, interval for determining the light intensity belonging to described light intensity, extract the duty cycle range of the interval corresponding high level of this light intensity.
First extraction module 660, for determining that described face is apart between affiliated face distance regions, extracts the dutycycle added value of high level corresponding between this face distance regions.
First computing module 670, the minimum value for the duty cycle range by the described high level extracted adds the dutycycle added value of the described high level of extraction, obtains current high level dutycycle, the duty cycle adjustment of high level to described current high level dutycycle.
A kind of intelligent terminal that the present embodiment provides regulates the system of brightness of display screen automatically, each module cooperative work above, automatically to regulate the brightness of display screen from the distance of display screen by obtaining light intensity around intelligent terminal and people, according to the change of light intensity and face distance, regulate the brightness of described intelligent terminal display screen, do not need manual adjustments, easy to use, when the brightness of intelligent terminal display screen is too strong, automatically the brightness turning down this intelligent terminal display screen can reduce the consumption of battery electric quantity, extends the standby and service time of intelligent terminal.
Embodiment seven
The present embodiment is refinement luminance adjustment module on the basis of embodiment five, and the corresponding embodiment three of the present embodiment, for detailed content can reference example three.
As shown in Figure 7, the present embodiment provides a kind of intelligent terminal automatically to regulate the system of brightness of display screen, comprising:
First acquisition module 710, for obtaining the light intensity around intelligent terminal display screen by light sensor.
Second acquisition module 720, for obtaining the face distance between face and intelligent terminal display screen by infrared distance sensor.
3rd divides module 730, interval for divided light line strength, arranges the value of the dutycycle of the interval corresponding high level of light intensity.
4th divides module 740, for dividing between face distance regions, arranges the dutycycle added value of high level corresponding between face distance regions.
3rd extraction module 750, interval for determining the light intensity belonging to described light intensity, extract the value of the dutycycle of the interval corresponding high level of this light intensity.
4th extraction module 760, for determining that described face is apart between affiliated face distance regions, extracts the dutycycle added value of high level corresponding between this face distance regions.
Second computing module 770, the value for the dutycycle by the described high level extracted adds the dutycycle added value of the described high level of extraction, obtains current high level dutycycle, the duty cycle adjustment of high level to described current high level dutycycle.
A kind of intelligent terminal that the present embodiment provides regulates the system of brightness of display screen automatically, each module cooperative work above, automatically to regulate the brightness of display screen from the distance of display screen by obtaining light intensity around intelligent terminal and people, according to the change of light intensity and face distance, regulate the brightness of described intelligent terminal display screen, do not need manual adjustments, easy to use, when the brightness of intelligent terminal display screen is too strong, automatically the brightness turning down this intelligent terminal display screen can reduce the consumption of battery electric quantity, extends the standby and service time of intelligent terminal.
Embodiment eight
The present embodiment is refinement luminance adjustment module on the basis of embodiment five, and the corresponding embodiment four of the present embodiment, for detailed content can reference example four.
As shown in Figure 8, the present embodiment provides a kind of intelligent terminal automatically to regulate the system of brightness of display screen, comprising:
First acquisition module 810, for obtaining the light intensity around intelligent terminal display screen by light sensor.
Second acquisition module 820, for obtaining the face distance between face and intelligent terminal display screen by infrared distance sensor.
5th divides module 830, interval for divided light line strength, arranges the value of the dutycycle of the interval corresponding high level of light intensity.
5th extraction module 840, interval for determining the light intensity belonging to described light intensity, extract the value of the dutycycle of the interval corresponding high level of this light intensity.
Module 850 is linearly set, for arranging the linear ratio relation of face distance and the dutycycle added value of high level.
6th extraction module 860, for extracting the dutycycle added value of high level corresponding to described face distance.
3rd computing module 870, the value for the dutycycle by the described high level extracted adds the dutycycle added value of the described high level of extraction, obtains current high level dutycycle, the duty cycle adjustment of high level to described current high level dutycycle.
A kind of intelligent terminal that the present embodiment provides regulates the system of brightness of display screen automatically, each module cooperative work above, automatically to regulate the brightness of display screen from the distance of display screen by obtaining light intensity around intelligent terminal and people, according to the change of light intensity and face distance, regulate the brightness of described intelligent terminal display screen, do not need manual adjustments, easy to use, when the brightness of intelligent terminal display screen is too strong, automatically the brightness turning down this intelligent terminal display screen can reduce the consumption of battery electric quantity, extends the standby and service time of intelligent terminal.
Below know-why of the present invention is described in conjunction with specific embodiments.These describe just in order to explain principle of the present invention, and can not be interpreted as limiting the scope of the invention by any way.Based on explanation herein, those skilled in the art does not need to pay performing creative labour can associate other embodiment of the present invention, and these modes all will fall within protection scope of the present invention.
Claims (10)
1. intelligent terminal regulates a method for brightness of display screen automatically, it is characterized in that, comprising:
The light intensity around intelligent terminal display screen is obtained by light sensor;
The face distance between face and intelligent terminal display screen is obtained by infrared distance sensor;
According to described light intensity and described face distance, regulate the brightness of described display screen.
2. method according to claim 1, is characterized in that, the brightness of the described display screen of described adjustment, comprising: by changing the dutycycle controlling the PWM waveform high level that described brightness of display screen regulates, regulate the brightness of described display screen.
3. method according to claim 2, is characterized in that, described according to described light intensity and described face distance, regulates the brightness of described display screen, comprising:
Divided light line strength is interval, arranges the duty cycle range of the interval corresponding high level of light intensity;
Divide between face distance regions, the dutycycle added value of high level corresponding between face distance regions is set;
Determine that the light intensity belonging to described light intensity is interval, extract the duty cycle range of the interval corresponding high level of this light intensity;
Determine that described face is apart between affiliated face distance regions, extract the dutycycle added value of high level corresponding between this face distance regions;
The minimum value of the duty cycle range of the described high level extracted is added the dutycycle added value of the described high level of extraction, obtain the dutycycle of current high level, the dutycycle of the duty cycle adjustment to described current high level that control the high level that described brightness of display screen regulates.
4. method according to claim 2, is characterized in that, described according to described light intensity and described face distance, regulates the brightness of described display screen, comprising:
Divided light line strength is interval, arranges the value of the dutycycle of the interval corresponding high level of light intensity;
Divide between face distance regions, the dutycycle added value of high level corresponding between face distance regions is set;
Determine that the light intensity belonging to described light intensity is interval, extract the value of the dutycycle of the interval corresponding high level of this light intensity;
Determine that described face is apart between affiliated face distance regions, extracts the dutycycle added value of corresponding high level between this face distance regions;
The value of the dutycycle of the described high level extracted is added the dutycycle added value of the described high level of extraction, obtain the dutycycle of current high level, the dutycycle of the duty cycle adjustment to described current high level that control the high level that described brightness of display screen regulates.
5. method according to claim 2, is characterized in that, described according to described light intensity and described face distance, regulates the brightness of described display screen, comprising:
Divided light line strength is interval, arranges the value of the dutycycle of the interval corresponding high level of light intensity;
Determine that the light intensity belonging to described light intensity is interval, extract the value of the dutycycle of the interval corresponding high level of this light intensity;
The linear ratio relation of face distance and the dutycycle added value of high level is set;
Extract the dutycycle added value of high level corresponding to described face distance;
The value of the dutycycle of the described high level extracted is added the dutycycle added value of the described high level of extraction, obtain the dutycycle of current high level, the dutycycle of the duty cycle adjustment to described current high level that control the high level that described brightness of display screen regulates.
6. intelligent terminal regulates a system for brightness of display screen automatically, it is characterized in that, comprising:
First acquisition module, for obtaining the light intensity around intelligent terminal display screen by light sensor;
Second acquisition module, for obtaining the face distance between face and intelligent terminal display screen by infrared distance sensor;
Luminance adjustment module, for according to described light intensity and described face distance, regulates the brightness of described display screen.
7. system according to claim 6, it is characterized in that, described luminance adjustment module, specifically for: according to described light intensity and described face distance, by changing the dutycycle controlling the PWM waveform high level that described brightness of display screen regulates, regulate the brightness of described display screen.
8. system according to claim 7, is characterized in that, described luminance adjustment module, comprising:
First divides module, interval for divided light line strength, arranges the duty cycle range of the interval corresponding high level of light intensity;
Second divides module, for dividing between face distance regions, arranges the dutycycle added value of high level corresponding between face distance regions;
First extraction module, interval for determining the light intensity belonging to described light intensity, extract the duty cycle range of the interval corresponding high level of this light intensity;
First extraction module, for determining that described face is apart between affiliated face distance regions, extracts the dutycycle added value of high level corresponding between this face distance regions;
First computing module, the minimum value for the duty cycle range by the described high level extracted adds the dutycycle added value of the described high level of extraction, obtains current high level dutycycle, the duty cycle adjustment of high level to described current high level dutycycle.
9. system according to claim 7, is characterized in that, described luminance adjustment module, comprising:
3rd divides module, interval for divided light line strength, arranges the value of the dutycycle of the interval corresponding high level of light intensity;
4th divides module, for dividing between face distance regions, arranges the dutycycle added value of high level corresponding between face distance regions;
3rd extraction module, interval for determining the light intensity belonging to described light intensity, extract the value of the dutycycle of the interval corresponding high level of this light intensity;
4th extraction module, for determining that described face is apart between affiliated face distance regions, extracts the dutycycle added value of high level corresponding between this face distance regions;
Second computing module, the value for the dutycycle by the described high level extracted adds the dutycycle added value of the described high level of extraction, obtains current high level dutycycle, the duty cycle adjustment of high level to described current high level dutycycle.
10. system according to claim 7, is characterized in that, described luminance adjustment module, comprising:
5th divides module, interval for divided light line strength, arranges the value of the dutycycle of the interval corresponding high level of light intensity;
5th extraction module, interval for determining the light intensity belonging to described light intensity, extract the value of the dutycycle of the interval corresponding high level of this light intensity;
Linearly module is set, for arranging the linear ratio relation of face distance and the dutycycle added value of high level;
6th extraction module, for extracting the dutycycle added value of high level corresponding to described face distance;
3rd computing module, the value for the dutycycle by the described high level extracted adds the dutycycle added value of the described high level of extraction, obtains current high level dutycycle, the duty cycle adjustment of high level to described current high level dutycycle.
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Application publication date: 20160302 |