CN105841807A - Method and system for enhancing light sensor detection stability and intelligent terminal - Google Patents
Method and system for enhancing light sensor detection stability and intelligent terminal Download PDFInfo
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- CN105841807A CN105841807A CN201610295687.5A CN201610295687A CN105841807A CN 105841807 A CN105841807 A CN 105841807A CN 201610295687 A CN201610295687 A CN 201610295687A CN 105841807 A CN105841807 A CN 105841807A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
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- G—PHYSICS
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- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
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Abstract
The invention provides a method and a system for enhancing light sensor detection stability and an intelligent terminal. Ambient light intensity signals and backlight brightness signals of the display screen of the intelligent terminal before and after a period of time are acquired through the light sensor of the intelligent terminal. If the ambient light intensity signal values detected before and after the period of time are greater than the backlight brightness signal values, a central processor is triggered to control voltage signals outputted by the light sensor to perform voltage stabilization processing and then light intensity detection values detected by the light sensor are outputted so that outputting of the stable light intensity detection values can be realized, and acquisition of the accurate light intensity detection values is facilitated for users.
Description
Technical field
The present invention relates to brightness detection technique field, a kind of improve the method for light sensors stability, system and intelligent terminal.
Background technology
During intelligence intelligent terminal's light sensors ambient light, there is the situation that ambient light detection is unstable.Owing to ambient light includes sunlight, its light reaches that the brightest state is unpredictable to be arrived, the state that then intelligence intelligent terminal's light sensors is the brightest less than ambient light, then optical sensor can detect the brightness of ambient light in a long time, to ensure to improve most possibly the accuracy of detection ambient light.Along with the increase of environmental light brightness, the precision of light sensors ambient light is more and more lower, the optical sensor ambient light desensitising to high brightness, then tend to unstable during light sensors ambient light.
Therefore, prior art awaits further improving.
Summary of the invention
In view of above-mentioned weak point of the prior art, it is an object of the invention to provide the user and a kind of improve the method for light sensors stability, system and intelligent terminal, for the optical sensor defect that detection sensitivity is low when extraneous ambient brightness height overcome in prior art in terminal.
It is as follows that the present invention solves the technical scheme that technical problem used:
A kind of method improving light sensors stability, wherein, comprises the following steps:
A, the optical sensor acquisition first environment light intensity signal utilizing intelligent terminal and the backlight illumination signal of acquisition intelligent terminal's display screen, and compare the size of described first environment light intensity signal and described first backlight illumination signal, if first environment light intensity signal value is more than the first backlight illumination signal value, then perform step B；Otherwise perform D；
B, compare the scheduled time after the second environment light intensity signal that gets of optical sensor and the size of current the second backlight illumination signal of intelligent terminal's display screen, if second environment light intensity signal is more than the second backlight illumination signal, then perform step C, otherwise perform step D；
After C, the voltage signal of triggering central processing unit control optical sensor output carry out voltage stabilizing process, perform step D；
The light intensity detected value that D, output light sensors arrive.
The method of described raising light sensors stability, wherein, described step A also includes:
First environment light intensity signal and the first backlight illumination signal are changed into voltage signal respectively, the current signal being then converted into is sent to current comparing module, by current comparing module more described first environment light intensity signal and the size of described first backlight illumination signal；
Described step B also includes:
Second environment light intensity signal and the second backlight illumination signal are changed into voltage signal respectively, the current signal being then converted into is sent to current comparing module, by current comparing module more described second environment light intensity signal and the size of described second backlight illumination signal.
The method of described raising light sensors stability, wherein, described step C also includes:
C1, current comparing module send low level signal, to central processing unit, triggering central processing unit, described voltage signal are carried out voltage stabilizing process.
The method of described raising light sensors stability, wherein, described step C1 also includes:
After C11, the voltage signal of output of optical sensor carry out voltage stabilizing process, the voltage signal after voltage stabilizing is inputted AD conversion unit, the digital signal after being changed by voltage signal.
A kind of system improving light sensors stability, wherein, including:
First comparison module, for utilizing the optical sensor of intelligent terminal obtain first environment light intensity signal and obtain the first backlight illumination signal of intelligent terminal's display screen, and compares the size of described first environment light intensity signal and described first backlight illumination signal；
Second comparison module, for when described first environment light intensity signal is more than described first backlight illumination signal, second environment light intensity signal that after comparing the scheduled time, optical sensor gets and the size of current the second backlight illumination signal of intelligent terminal's display screen；
Voltage stabilizing processing module, for carrying out voltage stabilizing process when second environment light intensity signal more than the second backlight illumination signal, the then voltage signal triggering central processing unit control optical sensor output；
Detected value output module, for exporting the light intensity detected value that light sensors arrives.
The system of described raising light sensors stability, wherein, described first comparison module also includes:
First signal converts and comparing unit, for first environment light intensity signal and the first backlight illumination signal are changed into voltage signal respectively, the current signal being then converted into is sent to current comparing module, by current comparing module more described first environment light intensity signal and the size of described first backlight illumination signal；
Described second comparison module also includes:
Secondary signal converts and comparing unit, for second environment light intensity signal and the second backlight illumination signal are changed into voltage signal respectively, the current signal being then converted into is sent to current comparing module, by current comparing module more described second environment light intensity signal and the size of described second backlight illumination signal.
The system of described raising light sensors stability, wherein, described voltage stabilizing processing module includes:
Trigger signal transmitting unit, send low level signal for current comparing module, to central processing unit, triggering central processing unit, described voltage signal is carried out voltage stabilizing process.
The system of described raising light sensors stability, wherein, described voltage stabilizing processing module also includes:
Modulus processing unit, after the voltage signal of the output of optical sensor carries out voltage stabilizing process, inputs AD conversion unit by the voltage signal after voltage stabilizing, the digital signal after being changed by voltage signal.
A kind of intelligent terminal, wherein, including: the system of described raising light sensors stability.
Beneficial effect, the invention provides a kind of method improving light sensors stability, system and intelligent terminal, by utilizing the optical sensor of intelligent terminal to obtain the ambient light intensity signal before and after a period of time and the backlight illumination signal of intelligent terminal's display screen, if this detects around time period that ambient light intensity signal value is all higher than backlight illumination signal value, after then the voltage signal of triggering central processing unit control optical sensor output carries out voltage stabilizing process, the light intensity detected value that output light sensors arrives, thus realize stablizing the output of light intensity detected value, obtain light intensity detected value accurately for user to provide convenience.
Accompanying drawing explanation
Fig. 1 is the flow chart of steps of a kind of method improving light sensors stability of the present invention.
Fig. 2 is the method for the invention step schematic diagram when specifically applying.
Fig. 3 is the method for the invention flow chart of steps when specifically applying.
Fig. 4 is the theory structure schematic diagram of the system of raising light sensors stability of the present invention.
Detailed description of the invention
For making the purpose of the present invention, technical scheme and advantage clearer, clear and definite, the present invention is described in more detail for the embodiment that develops simultaneously referring to the drawings.Should be appreciated that specific embodiment described herein is used only for explaining the present invention, be not intended to limit the present invention.
Owing to the ambient light of high brightness is reduced sensing capability by optical sensor, along with the increase of environmental light brightness, the accuracy of light sensors ambient light reduces, then tend to unstable during light sensors ambient light.In order to solve above-mentioned optical sensor stability under high illumination, the invention provides following solution and its system.
The invention provides a kind of method improving light sensors stability, as it is shown in figure 1, comprise the following steps:
S1, the optical sensor acquisition first environment light intensity signal utilizing intelligent terminal and the first backlight illumination signal of acquisition intelligent terminal's display screen, and compare the size of described first environment light intensity signal and described first backlight illumination signal, if first environment light intensity signal value is more than the first backlight illumination signal value, then perform step S2；Otherwise perform S4.
The optical sensor built-in first by intelligent terminal obtains ambient light intensity signal, the ambient light intensity signal of previous acquisition is referred to as first environment light intensity signal, and the backlight illumination signal of intelligent terminal's display screen of previous acquisition is referred to as the first backlight illumination signal.
When including sunlight due to light sensors ambient light, increase along with its brightness, the sensing capability of ambient light is reduced by optical sensor, now light sensors ambient light tends to unstable, then needing the judgement by ambient light being included sunlight brightness, stablizing optical sensor and ambient light is included the detection of sunlight.
The negative input of the electric current comparing unit that the current signal I1 of voltage current conversion unit output is input in backlight illumination detection module, the electric current I2 of the back facet current detector unit detection intelligence intelligent terminal's LED backlight unit in backlight illumination detection module is input to the electrode input end of electric current comparing unit.Electric current I1 is compared by this electric current I2 as with reference to the electric current compared, it is judged that the size of electric current I1, and then judges that ambient light includes the brightness flop of sunlight.Why need electric current I1 is compared judgement, and then judge that ambient light includes the brightness flop of sunlight, it is because needing the situation of change according to electric current I1, judge the steady statue of optical sensor, i.e. when what state electric current I1 reach, need the detection of stable optical sensor, when now light sensors ambient light includes sunlight, stablize output light intensity detected value.
S2, compare the scheduled time after the second environment light intensity signal that gets of optical sensor and the size of current the second backlight illumination signal of intelligent terminal's display screen, if second environment light intensity signal is more than the second backlight illumination signal, then perform step S3, otherwise perform step S4.
Owing to detecting that current environment light intensity signal is more than display backlight luminance signal in step sl, therefore now may may need occur that ambient light intensity signal is bigger, cause the inaccurate situation of light sensors light intensity, and in order to judge the detection state at optical sensor accurately, this step uses in its scheduled time twice or the ambient light signal situation that repeatedly obtains are compared, judge the substantially situation of current environment intensity variation, by repeatedly by ambient brightness value in the scheduled time compared with backlight brightness values, determine whether whether ambient light intensity continues bigger, if continuing bigger, then perform step S3 to it, otherwise, illustrate that optical sensor can be with stable detection ambient light intensity.
Described step S1 also includes:
First environment light intensity signal and the first backlight illumination signal are changed into voltage signal respectively, the current signal being then converted into is sent to current comparing module, by current comparing module more described first environment light intensity signal and the size of described first backlight illumination signal；
Described step S2 also includes:
Second environment light intensity signal and the second backlight illumination signal are changed into voltage signal respectively, the current signal being then converted into is sent to current comparing module, by current comparing module more described second environment light intensity signal and the size of described second backlight illumination signal.
Concrete, first first or second environment light intensity signal and the first or second backlight illumination signal are changed into voltage signal respectively, it is then converted into current signal, and current signal conversion obtained is sent to current comparing module, carry out converting the comparison of after current signal magnitude by current comparing module, it is determined that ambient light intensity signal and the size of backlight illumination signal.
After S3, the voltage signal of triggering central processing unit control optical sensor output carry out voltage stabilizing process, perform step S4.
Use the most in this step, environmental light brightness after the scheduled time is compared with display backlight brightness, when the result of this twice detection is environmental light brightness more than display backlight brightness, then explanation current environmental light brightness has been over the threshold value that optical sensor can be answered with sense of stability, exports after needing optical sensor output information is carried out voltage stabilizing process again.If this step ambient light strength signal becomes smaller than the backlight illumination signal of display screen, then illustrate that optical sensor still can stablize output environment brightness signal within a predetermined period of time, therefore need not voltage stabilizing is processed by its output signal.
Concrete, this step also includes: after the voltage signal of the output of optical sensor carries out voltage stabilizing process, the voltage signal after voltage stabilizing is inputted AD conversion unit, the digital signal after voltage signal is changed.
The light intensity detected value that S4, output light sensors arrive.
After the ambient light intensity signal got in optical sensor is carried out respective handling, export the light intensity detected value of its detection.
Described step S3 also includes:
S31, current comparing module send low level signal, to central processing unit, triggering central processing unit, described voltage signal are carried out voltage stabilizing process.
In order to the method for the invention is made further instructions, method is done detailed explanation below as a example by its concrete Application Example.
Shown in Fig. 2 and Fig. 3, the step of its specific embodiment is as follows:
H1, utilize optical sensor to obtain ambient light intensity signal, more described ambient light intensity signal is changed into voltage signal, by current conversion module, described voltage signal is converted to current signal I1, utilizes the electric current I2 obtaining intelligent terminal's LED backlight unit simultaneously.
H2, compared current signal I1 and current signal I2 by electric current comparing unit.If current signal I1 is less than current signal I2, then illustrate that ambient light now includes that the brightness of sunlight is less than intelligence intelligent terminal's backlight illumination, then optical sensor stable detection ambient light can include the brightness of sunlight at this moment, simultaneously need to detection is within this time period, ambient light includes the change of sunlight brightness.
H3, after the scheduled time, if the influence value of light sensors ambient light is Ln lux, the ambient light sensed is included that sunlight changes into voltage signal by the photoelectric conversion unit in optical sensor, then changes into current signal I1n through voltage current conversion unit.The electric current I2n of the back facet current detector unit detection intelligence intelligent terminal's LED backlight unit in backlight illumination detection module.
H4, electric current comparing unit compare current signal I1n and current signal I2n.If current signal I1n is less than current signal I2n, then optical sensor is within this time period, and energy stable detection ambient light includes the brightness of sunlight.If current signal I1n is more than current signal I2n, then optical sensor is within this time period, it is impossible to stable detection ambient light includes the brightness of sunlight, needs to do next step and processes.
Electric current comparing unit output low level signal is to central processing unit, central processing unit judges the duty of optical sensor according to this low level signal, now optical sensor includes that to ambient light the brightness impression of sunlight reduces, then central processing unit needs to be controlled the testing result of optical sensor.
H5, arranging voltage regulation unit, the photoelectric conversion unit in optical sensor converts the voltage signal of output and is input to voltage regulation unit, is input to AD conversion unit through voltage stabilizing output maximum voltage signal.
H6, central processing unit call the AD conversion unit that control instruction signal 2 controls in optical sensor.AD conversion unit includes the brightness impression of sunlight according to optical sensor to current environment light, exports stable light detected value, stable at maximum influence value Lmax lux.
The method of the invention is processed by above-mentioned steps, the ambient light intensity signal of optical sensor output is detected, when after its detection jitter, after then its voltage signal exported being carried out voltage stabilizing process by Voltage stabilizing module, export again, therefore can obtain more stable light intensity detected value, the use for intelligent terminal provides convenient.
Based on the above method, the invention also discloses a kind of system improving light sensors stability, as shown in Figure 4, described system includes:
First comparison module 110, for utilizing the optical sensor of intelligent terminal obtain first environment light intensity signal and obtain the first backlight illumination signal of intelligent terminal's display screen, and compares the size of described first environment light intensity signal and described first backlight illumination signal；Its function is as described in step S1.
Second comparison module 120, for when described first environment light intensity signal is more than described first backlight illumination signal, second environment light intensity signal that after comparing the scheduled time, optical sensor gets and the size of current the second backlight illumination signal of intelligent terminal's display screen；Its function is as described in step S2.
Voltage stabilizing processing module 130, for carrying out voltage stabilizing process when second environment light intensity signal more than the second backlight illumination signal, the then voltage signal triggering central processing unit control optical sensor output；Its function is as described in step S3.
Detected value output module 140, for exporting the light intensity detected value that light sensors arrives, its function is as described in step S4.
Described first comparison module also includes:
First signal converts and comparing unit, for first environment light intensity signal and the first backlight illumination signal are changed into voltage signal respectively, the current signal being then converted into is sent to current comparing module, by current comparing module more described first environment light intensity signal and the size of described first backlight illumination signal；
Described second comparison module also includes:
Secondary signal converts and comparing unit, for second environment light intensity signal and the second backlight illumination signal are changed into voltage signal respectively, the current signal being then converted into is sent to current comparing module, by current comparing module more described second environment light intensity signal and the size of described second backlight illumination signal.
Described voltage stabilizing processing module 130 includes:
Trigger signal transmitting unit, send low level signal for current comparing module, to central processing unit, triggering central processing unit, described voltage signal is carried out voltage stabilizing process.
Described voltage stabilizing processing module 130 also includes:
Modulus processing unit, after the voltage signal of the output of optical sensor carries out voltage stabilizing process, inputs AD conversion unit by the voltage signal after voltage stabilizing, the digital signal after being changed by voltage signal.
A kind of intelligent terminal is the invention also discloses on the basis of said system, wherein, including: the system of described raising light sensors stability.It is envisioned that described intelligent terminal can be mobile phone, panel computer or notebook computer, Intelligent worn device etc..
Beneficial effect, the invention provides a kind of method improving light sensors stability, system and intelligent terminal, by utilizing the optical sensor of intelligent terminal to obtain the ambient light intensity signal before and after a period of time and the backlight illumination signal of intelligent terminal's display screen, if this detects around time period that ambient light intensity signal value is all higher than backlight illumination signal value, after then the voltage signal of triggering central processing unit control optical sensor output carries out voltage stabilizing process, the light intensity detected value that output light sensors arrives, thus realize stablizing the output of light intensity detected value, obtain light intensity detected value accurately for user to provide convenience.
It is understood that for those of ordinary skills, can be according to technical scheme and inventive concept thereof in addition equivalent or change, and all these change or replace the protection domain that all should belong to appended claims of the invention.
Claims (9)
1. the method improving light sensors stability, it is characterised in that comprise the following steps:
A, the optical sensor acquisition first environment light intensity signal utilizing intelligent terminal and the first backlight illumination signal of acquisition intelligent terminal's display screen, and compare the size of described first environment light intensity signal and described first backlight illumination signal, if first environment light intensity signal value is more than the first backlight illumination signal value, then perform step B；Otherwise perform D；
B, compare the scheduled time after the second environment light intensity signal that gets of optical sensor and the size of current the second backlight illumination signal of intelligent terminal's display screen, if second environment light intensity signal is more than the second backlight illumination signal, then perform step C, otherwise perform step D；
After C, the voltage signal of triggering central processing unit control optical sensor output carry out voltage stabilizing process, perform step D；
The light intensity detected value that D, output light sensors arrive.
The method of raising light sensors stability the most according to claim 1, it is characterised in that described step A also includes:
First environment light intensity signal and the first backlight illumination signal are changed into voltage signal respectively, the current signal being then converted into is sent to current comparing module, by current comparing module more described first environment light intensity signal and the size of described first backlight illumination signal；
Described step B also includes:
Second environment light intensity signal and the second backlight illumination signal are changed into voltage signal respectively, the current signal being then converted into is sent to current comparing module, by current comparing module more described second environment light intensity signal and the size of described second backlight illumination signal.
The method of raising light sensors stability the most according to claim 1, it is characterised in that described step C also includes:
C1, current comparing module send low level signal, to central processing unit, triggering central processing unit, described voltage signal are carried out voltage stabilizing process.
The method of raising light sensors stability the most according to claim 3, it is characterised in that described step C1 also includes:
After C11, the voltage signal of output of optical sensor carry out voltage stabilizing process, the voltage signal after voltage stabilizing is inputted AD conversion unit, the digital signal after being changed by voltage signal.
5. the system improving light sensors stability, it is characterised in that including:
First comparison module, for utilizing the optical sensor of intelligent terminal obtain first environment light intensity signal and obtain the first backlight illumination signal of intelligent terminal's display screen, and compares the size of described first environment light intensity signal and described first backlight illumination signal；
Second comparison module, for when described first environment light intensity signal is more than described first backlight illumination signal, second environment light intensity signal that after comparing the scheduled time, optical sensor gets and the size of current the second backlight illumination signal of intelligent terminal's display screen；
Voltage stabilizing processing module, for carrying out voltage stabilizing process when second environment light intensity signal more than the second backlight illumination signal, the then voltage signal triggering central processing unit control optical sensor output；
Detected value output module, for exporting the light intensity detected value that light sensors arrives.
The system of raising light sensors stability the most according to claim 5, it is characterised in that described first comparison module also includes:
First signal converts and comparing unit, for first environment light intensity signal and the first backlight illumination signal are changed into voltage signal respectively, the current signal being then converted into is sent to current comparing module, by current comparing module more described first environment light intensity signal and the size of described first backlight illumination signal；
Described second comparison module also includes:
Secondary signal converts and comparing unit, for second environment light intensity signal and the second backlight illumination signal are changed into voltage signal respectively, the current signal being then converted into is sent to current comparing module, by current comparing module more described second environment light intensity signal and the size of described second backlight illumination signal.
The system of raising light sensors stability the most according to claim 5, it is characterised in that described voltage stabilizing processing module includes:
Trigger signal transmitting unit, send low level signal for current comparing module, to central processing unit, triggering central processing unit, described voltage signal is carried out voltage stabilizing process.
The system of raising light sensors stability the most according to claim 7, it is characterised in that described voltage stabilizing processing module also includes:
Modulus processing unit, after the voltage signal of the output of optical sensor carries out voltage stabilizing process, inputs AD conversion unit by the voltage signal after voltage stabilizing, the digital signal after being changed by voltage signal.
9. an intelligent terminal, it is characterised in that including: the system of the raising light sensors stability as described in any one of claim 5-8.
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| CN111754932A (en) * | 2019-09-11 | 2020-10-09 | 义明科技股份有限公司 | Electronic device and method for detecting ambient light |
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| CN107945769B (en) * | 2017-11-22 | 2020-04-10 | Oppo广东移动通信有限公司 | Ambient light intensity detection method and device, storage medium and electronic equipment |
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