CN103037088B - Method and mobile terminal for screen backlight adjusting - Google Patents

Method and mobile terminal for screen backlight adjusting Download PDF

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Publication number
CN103037088B
CN103037088B CN201210534802.1A CN201210534802A CN103037088B CN 103037088 B CN103037088 B CN 103037088B CN 201210534802 A CN201210534802 A CN 201210534802A CN 103037088 B CN103037088 B CN 103037088B
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measured value
mobile terminal
ambient light
elevation angle
screen backlight
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CN103037088A (en
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褚红玉
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Huizhou TCL Mobile Communication Co Ltd
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Huizhou TCL Mobile Communication Co Ltd
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Abstract

The invention discloses a method and a mobile terminal for screen backlight adjusting, wherein the method includes: the mobile terminal obtains a present measured value of an ambient light sensor and judges whether the difference between the present measured value of the ambient light sensor and the last measured value is larger than a threshold value, if the difference between the present measured value of the ambient light sensor and the last measured value is larger than the threshold value, a present measured value of a gravity sensor in the mobile terminal is obtained, and an elevation angle of the mobile terminal is determined, whether the elevation angle is larger than a critical value is judged if the elevation angle is smaller than or equal to the critical value, corresponding screen backlight brightness is determined and set according to the present measured value of the ambient light sensor and a first relation, and if the elevation angle is larger than the critical value, the screen backlight brightness is controlled to be constant or be relatively small in variation. Due to the method, in an indoor environment, when the elevation angle of the position which the mobile terminal is located is larger than the critical value, the situation in which drastic change of screen backlight happens can be avoided, and the experience of a user is optimized.

Description

A kind of method and mobile terminal adjusting screen backlight
Technical field
The present invention relates to mobile communication technology field, particularly relate to a kind of method and the mobile terminal that adjust screen backlight.
Background technology
At present, mobile terminal is generally all provided with ambient light sensor, to adjust the screen backlight of mobile terminal.Mobile terminal can know the luminous intensity of the current residing environment of mobile terminal by ambient light sensor, and according to current environment luminous intensity, the brightness of adjustment screen backlight, makes it and environmental adaptation.
Adjust in the mode of screen backlight at the existing ambient light sensor that utilizes, it is generally acknowledged that ambient light intensity and screen backlight exist linear positive correlation, therefore mobile terminal is according to the current environment luminous intensity obtained, and directly adjusts screen backlight linearly.But present inventor studies discovery, when mobile terminal is in indoor environment, general artificial light source is in the user crown, and when luminous intensity is certain, the elevation angle of mobile terminal is different, and the value that ambient light sensor records is also different.And when the elevation angle of mobile terminal is greater than a certain angle, the value that ambient light sensor records can decline rapidly along with the increase at the elevation angle.In a prior art situation, now, the angle change that mobile terminal is comparatively trickle, the change that the value that all ambient light sensor can be caused to record is larger, correspondingly, screen backlight also produces acute variation thereupon, makes to cause poor Consumer's Experience.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of method and the mobile terminal that adjust screen backlight, can avoid the screen backlight brightness of mobile terminal, along with the elevation angle residing for mobile terminal, irrational change occurs, promote Consumer's Experience.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of method adjusting screen backlight, comprise the following steps: mobile terminal ambient light transducer current institute measured value described in acquisition for mobile terminal, and judge whether described ambient light sensor current institute measured value is greater than threshold value with the difference of the last ambient light sensor institute measured value obtained; If described ambient light sensor current institute measured value is greater than threshold value with the difference of the last ambient light sensor institute measured value obtained, described mobile terminal then obtains gravity sensor current institute measured value in mobile terminal; Described mobile terminal, according to described gravity sensor current institute measured value, determines the elevation angle residing for mobile terminal, and judges whether the described elevation angle is greater than critical value; If the described elevation angle is less than or equal to described critical value, described mobile terminal is then according to described ambient light sensor current institute measured value, and the first relation of the ambient light sensor institute's measured value preset and screen backlight brightness, determine corresponding screen backlight brightness and arrange; If the described elevation angle is greater than described critical value, it is constant that described mobile terminal controls screen backlight illumination, or according to described ambient light sensor current institute measured value, and the second relation of the ambient light sensor institute's measured value preset and screen backlight brightness, determine corresponding screen backlight brightness and arrange, in described second relation, screen backlight brightness is little with the speed of ambient light sensor institute measured value change with screen backlight brightness in speed ratio first relation of ambient light sensor institute measured value change.
Wherein, when the described elevation angle is less than or equal to described critical value, described mobile terminal is then according to described ambient light sensor current institute measured value, and the first relation of ambient light sensor institute's measured value and the screen backlight brightness preset, determine the screen backlight brightness of correspondence and comprise after carrying out the step arranged: ambient light sensor current institute measured value described in described mobile terminal records.
Wherein, comprise before the step of mobile terminal ambient light transducer current institute measured value described in described acquisition for mobile terminal: described mobile terminal is according to the relation of the elevation angle of mobile terminal with corresponding ambient light sensor institute measured value, determine the critical value at the elevation angle, wherein, when the elevation angle of described mobile terminal is greater than described critical value, described ambient light sensor institute measured value declines rapidly with the increase at the described elevation angle.
Wherein, described critical value is between 30 ~ 60 degree.
Wherein, described critical value is 40 degree, 45 degree or 50 degree.
For solving the problems of the technologies described above, another technical solution used in the present invention is: provide a kind of mobile terminal, comprises surround lighting induction module, gravity sensing module, processing module and backlight administration module; Described surround lighting induction module for obtaining the value corresponding with current environment luminous intensity as current institute measured value, and sends the current institute measured value of surround lighting induction module to described processing module; Described processing module is for receiving the current institute measured value of described surround lighting induction module, and judge whether the difference of described surround lighting induction module current institute measured value and last surround lighting induction module institute measured value is greater than threshold value, judged result is sent to described gravity sensing module; Described gravity sensing module is used for the judged result that receiving processing module sends, described surround lighting induction module current institute measured value with on the difference of surround lighting induction module institute measured value that once obtains be greater than threshold value time, obtain the value corresponding with the described mobile terminal elevation angle as current institute measured value, and send to described processing module; Described processing module is further used for the current institute measured value receiving described gravity sensing module, and according to the current institute measured value of described gravity sensing module, determine the elevation angle of described mobile terminal, and judge whether the described elevation angle is greater than critical value, the light regime module that judged result supported or opposed sends; Described backlight administration module is used for the judged result that receiving processing module sends, when the described elevation angle is less than or equal to critical value, according to described surround lighting induction module current institute measured value, and the first relation of the surround lighting induction module institute's measured value preset and screen backlight brightness, determine corresponding screen backlight brightness and arrange; When the described elevation angle is greater than described critical value, control screen backlight illumination constant, or according to described surround lighting induction module current institute measured value, and the second relation of the surround lighting induction module institute's measured value preset and screen backlight brightness, determine corresponding screen backlight brightness and arrange, in described second relation, screen backlight brightness is little with the speed of surround lighting induction module institute measured value change with screen backlight brightness in speed ratio first relation of surround lighting induction module institute measured value change.
Wherein, also comprise logging modle, described logging modle is used for the judged result that receiving processing module sends, and when the described elevation angle is less than or equal to critical value, records described surround lighting induction module current institute measured value.
Wherein, described critical value is between 30 ~ 60 degree.
Wherein, described critical value is 40 degree, 45 degree or 50 degree.
Wherein, described surround lighting induction module is ambient light sensor, and described ambient light sensor is for obtaining the signal of telecommunication corresponding with current environment luminous intensity as current institute measured value; Described gravity sensing module is gravity sensor, and described gravity sensor is for obtaining the signal of telecommunication corresponding with the elevation angle of described mobile terminal as current institute measured value.
The invention has the beneficial effects as follows: the situation being different from prior art, the present invention is by the elevation angle residing for gravity sensor determination mobile terminal, when judging that the described elevation angle is greater than critical value, control the constant rear variable quantity of screen backlight illumination less, avoid in indoor environment, when the elevation angle residing for mobile terminal is greater than critical value, there is the situation of violent change in screen backlight thereupon, optimizes the experience of user.Meanwhile, the present invention, when the change of ambient light sensor institute measured value is greater than threshold value, just carries out judging to arrange screen backlight according to the elevation angle, avoids the frequent setting that screen backlight is unnecessary, improve the stability of screen backlight.
Accompanying drawing explanation
Fig. 1 is the flow chart that the present invention adjusts method one execution mode of screen backlight;
Fig. 2 is the flow chart that the present invention adjusts another execution mode of method of screen backlight;
Fig. 3 is the graph of relation between the elevation angle of a mobile terminal in indoor environment and ambient light sensor institute measured value;
Fig. 4 is the structural representation of mobile terminal one execution mode of the present invention;
Fig. 5 is the structural representation of another execution mode of mobile terminal of the present invention.
Embodiment
Be described below in conjunction with accompanying drawing and concrete execution mode.
Refer to Fig. 1, Fig. 1 is the flow chart that the present invention adjusts method one execution mode of screen backlight, and present embodiment comprises the following steps:
Step S101: obtain ambient light sensor current institute measured value, and judge whether be greater than threshold value with the difference of last institute measured value;
Be previously provided with ambient light sensor in the terminal, acquisition for mobile terminal ambient light sensor current institute measured value, in present embodiment, ambient light sensor current institute measured value is the signal of telecommunication corresponding with current environment luminous intensity that ambient light sensor produces.Then, mobile terminal judges whether described ambient light sensor current institute measured value is greater than threshold value with the difference of the last ambient light sensor institute measured value obtained, if be greater than threshold value, then enter step S102, otherwise, continue to obtain ambient light sensor institute measured value, and whether the difference of carrying out ambient light sensor institute's measured value and the last institute measured value newly obtained is greater than the judgement of threshold value.
It should be noted that, above-mentioned threshold value is a default ambient light sensor institute measured value, to realize, when the measured value change of current environment optical sensor institute is in this threshold range, need not carrying out the setting of screen backlight.In present embodiment, this threshold value carries out actual measurement to mobile terminal in advance by those skilled in the art, and gets a reasonable value as described threshold value.Certainly, threshold value is not limited only to be arranged by technical staff in advance, and in other embodiments, this threshold value by user voluntarily according to user demand, can be arranged.In addition, because general outdoor intensity variation is little, and natural daylight has isotropism, therefore how to change regardless of the elevation angle of mobile terminal, and ambient light sensor current institute measured value also changes not quite.Therefore, in some embodiments, this threshold value can be also a default ambient light sensor institute measured value, to realize, when current environment intensity variation is greater than in this threshold range, being judged as indoor environment.Now, the size of this threshold value is suitably determined according to the concrete measurement of those skilled in the art.
In addition, the ambient light sensor institute measured value in the present invention is also not limited only to the signal of telecommunication corresponding with ambient light intensity into ambient light sensor produces.In other embodiments, ambient light sensor institute measured value can be set to value corresponding with ambient light intensity arbitrarily according to actual needs, and correspondingly, the size of threshold value also should carry out suitable change.
Step S102: obtain gravity sensor current institute measured value in mobile terminal;
Gravity sensor is previously provided with, acquisition for mobile terminal gravity sensor current institute measured value in mobile terminal.In present embodiment, described gravity sensor current institute measured value is the value of electrical signals corresponding with the elevation angle of mobile terminal that gravity sensor produces.But in other embodiments, gravity sensor institute measured value is not only for the signal of telecommunication corresponding with the elevation angle of mobile terminal produced for gravity sensor, and gravity sensor institute measured value can be set to value corresponding with the elevation angle of the mobile terminal at gravity sensor place arbitrarily according to practical application.
Step S103: determine the elevation angle residing for mobile terminal, and judge whether the described elevation angle is greater than critical value;
After acquisition for mobile terminal gravity sensor current institute measured value, according to the relation between gravity sensor institute's measured value and the mobile terminal elevation angle, determine the elevation angle residing for mobile terminal, and judge whether this elevation angle is greater than critical value, if the elevation angle is less than or equal to critical value, then enter step S104, otherwise enter step S105.Wherein, the elevation angle of mobile terminal is the angle of mobile terminal and horizontal direction.Critical value is carry out to mobile terminal the elevation value that actual test obtains in indoor environment in advance, and when the elevation angle of mobile terminal is greater than this critical value, the ambient light sensor institute measured value in mobile terminal, with the change at the elevation angle, violent change occurs.And according to actual conditions, this critical value generally between 30 ~ 60 degree, such as 40 degree, 45 degree, 50 degree etc.
Step S104: environmentally optical sensor current institute measured value and the first relation, determines corresponding screen backlight brightness and arranges.
Mobile terminal pre-sets the first relation of ambient light sensor institute's measured value and screen backlight brightness, and according to the ambient light sensor got current institute measured value, determine and the screen backlight brightness of mobile terminal is set, after executing this step, namely returning step S101.In present embodiment, the first relation of ambient light sensor institute's measured value and screen backlight brightness is set to linear positively related relation.Certainly, in other embodiments, first relation of ambient light sensor institute's measured value and screen backlight brightness is not limited in linear positive correlation, first relation of ambient light sensor institute's measured value and screen backlight brightness according to the actual conditions of mobile terminal or environment for use, can carry out corresponding relation setting.Such as, this first relation is set to the relation of positively nonlinear correlation, and when ambient light sensor institute measured value is larger, the speed of screen backlight brightness change is less, and when ambient light sensor institute measured value is less, the speed of screen backlight brightness change greatly.
Step S105: control screen backlight illumination constant, or environmentally optical sensor current institute measured value and the second relation, arranged.
When the elevation angle of mobile terminal is greater than critical value, there is violent change in the ambient light sensor institute measured value in mobile terminal with the change at the elevation angle.In present embodiment, the screen backlight change of mobile terminal is the linear positive correlation change of ambient light sensor institute measured value, therefore produce violent change due to the slight change at the elevation angle in order to avoid the screen backlight of mobile terminal, when the mobile terminal elevation angle is greater than critical value, it is constant that mobile terminal controls screen backlight illumination, and return step S101.
Or, mobile terminal pre-sets the second relation that mobile terminal pre-sets ambient light sensor institute's measured value and screen backlight brightness, and according to the ambient light sensor got current institute measured value, determine and the screen backlight brightness of mobile terminal is set, and returning step S101.Wherein, in described second relation, screen backlight brightness is little with the speed of ambient light sensor institute measured value change with screen backlight brightness in speed ratio first relation of ambient light sensor institute measured value change.In present embodiment, the second relation of ambient light sensor institute's measured value and screen backlight brightness is also set to linear positively related relation.Certainly, in other embodiments, second relation of ambient light sensor institute's measured value and screen backlight brightness is also not limited in linear positive correlation, second relation of ambient light sensor institute's measured value and screen backlight brightness according to the actual conditions of mobile terminal or environment for use, can carry out corresponding relation setting.But it should be noted that in the second relation, screen backlight brightness must be less with the speed of ambient light sensor institute measured value change than screen backlight brightness in the first relation with the speed that ambient light sensor institute measured value changes.
More optimally, refer to Fig. 2 and Fig. 3, Fig. 2 is the flow chart that the present invention adjusts another execution mode of method of screen backlight, and Fig. 3 is the graph of relation between the elevation angle of a mobile terminal in indoor environment and ambient light sensor institute measured value.Step S202 in present embodiment, S203, S204, S205, S207 and the step S101 in upper execution mode, S102, S103, S104, S105 are consistent, therefore describe about the related text referring to upper execution mode that illustrates of step S202, S203, S204, S205, S207, do not repeat them here.
Step S201: according to the elevation angle of mobile terminal and the relation of ambient light sensor institute measured value, determine the critical value at the elevation angle.
Mobile terminal is according to the relation in indoor environment of its elevation angle and ambient light sensor institute measured value, determine the critical value at the elevation angle, wherein, when the elevation angle of described mobile terminal is greater than described critical value, described ambient light sensor institute measured value declines rapidly with the increase at the described elevation angle.In present embodiment, actual measurement is carried out to the ambient light sensor institute measured value in mobile terminal in the elevations angle different according to mobile terminal in advance in indoor environment, in actual conditions, also there is the problem of the reception light cone of ambient light sensor, therefore present embodiment measurement obtains the elevation angle and the ambient light sensor institute measured value relation curve of mobile terminal as shown in Figure 3.Can obtain according to this relation curve, π/4 are approximated being greater than 0.75(0.75 at the mobile terminal elevation angle, be 45 degree) time, ambient light sensor institute measured value declines rapidly to the increase at the elevation angle, therefore this point to be judged as the critical point of environmental sensor institute measured value acute variation, and using 45 degree of critical values as mobile terminal.
It should be noted that, although present embodiment is according to the relation determination critical value of the mobile terminal elevation angle in indoor environment and ambient light sensor institute measured value, do not affect the adjustment of screen backlight in outdoor environment.In outdoor environment, within the shorter time period, natural daylight intensity is substantially constant, and has isotropic character due to natural daylight, therefore no matter the elevation angle of mobile terminal be how many, and ambient light sensor current institute measured value interior during this period of time is also substantially constant.Therefore, during this period of time, only screen backlight need be set once.Generally, mobile terminal in using can not be in big-elevation state for a long time, so, as long as during this period of time, mobile terminal (is greater than the sampling period of ambient light sensor and gravity sensor once momently, generally, the described sampling period is less than one second) be in little elevation angle state, screen backlight can be arranged correctly.
Step S206: record described ambient light sensor current institute measured value.
When the elevation angle of mobile terminal is less than or equal to the elevation angle, after mobile terminal arranges screen backlight brightness, mobile terminal records ambient light sensor current institute measured value, for after next acquisition for mobile terminal ambient light sensor institute measured value, subtract each other with the institute's measured value newly obtained, and difference is compared with threshold value, realize when the measured value change of ambient light sensor institute is less than threshold value, do not carry out the setting to screen backlight, avoid the frequent setting that screen backlight is unnecessary.Namely step S202 is returned after executing this step.
Be different from prior art, the present invention is by the elevation angle residing for gravity sensor determination mobile terminal, when judging that the described elevation angle is greater than critical value, control the constant rear variable quantity of screen backlight illumination less, avoid in indoor environment, when the elevation angle residing for mobile terminal is greater than critical value, there is the situation of violent change in screen backlight thereupon, optimizes the experience of user.Meanwhile, the present invention, when the change of ambient light sensor institute measured value is greater than threshold value, just carries out judging to arrange screen backlight according to the elevation angle, avoids the frequent setting that screen backlight is unnecessary, improve the stability of screen backlight.
Refer to Fig. 4, Fig. 4 is the structural representation of mobile terminal one execution mode of the present invention.In the present embodiment, mobile terminal 300 comprises surround lighting induction module 301, gravity sensing module 303, processing module 302 and backlight administration module 304.
The current institute measured value of surround lighting induction module 301 for obtaining the value corresponding with current environment luminous intensity as current institute measured value, and sends to described processing module 302 by surround lighting induction module 301.In present embodiment, surround lighting induction module 301 is ambient light sensor, the value corresponding with current environment luminous intensity that surround lighting induction module 301 obtains, and is the signal of telecommunication corresponding with current environment luminous intensity that surround lighting induction module 301 produces.It should be noted that, surround lighting induction module 301 is not limited only to ambient light sensor, surround lighting induction module 301 can be the device that can obtain arbitrarily the value corresponding with current environment luminous intensity, surround lighting induction module 301 obtains and is also not limited only to obtain the signal of telecommunication corresponding with current environment luminous intensity with current environment luminous intensity respective value simultaneously, in other embodiments, surround lighting induction module 301 can be set to obtain other values corresponding with current environment luminous intensity according to actual needs.
Processing module 302 is for the current institute measured value of reception environment photoinduction module 301, and judge whether the difference of surround lighting induction module 301 current institute measured value and last surround lighting induction module 301 measured values is greater than threshold value, judged result is sent to gravity sensing module 303.
It should be noted that, above-mentioned threshold value is default surround lighting induction module 301 measured values, to realize, when current environment intensity variation is in this threshold range, need not carrying out the setting of screen backlight.In present embodiment, this threshold value carries out actual measurement to mobile terminal 300 in advance by those skilled in the art, and gets a reasonable value as described threshold value.Certainly, threshold value is not limited only to be arranged by technical staff in advance, and in other embodiments, this threshold value by user voluntarily according to user demand, can be arranged.
The judged result that gravity sensing module 303 sends for receiving processing module 302, surround lighting induction module 301 current institute measured value with on the difference of surround lighting induction module 301 measured values that once obtains be greater than threshold value time, obtain the value corresponding with mobile terminal 300 elevation angle as current institute measured value, and send to processing module 302.In present embodiment, gravity sensing module 303 is gravity sensor, and the value corresponding with mobile terminal 300 elevation angle that gravity sensing module 303 obtains is the signal of telecommunication corresponding with the elevation angle of mobile terminal 300 that gravity induction module 303 produces.It should be noted that, gravity sensing module 303 is not limited only to gravity sensor, and gravity sensing module 303 can be the device that can obtain arbitrarily the value corresponding with mobile terminal 300 elevation angle.The value corresponding with mobile terminal 300 elevation angle of gravity sensing module 303 acquisition be not simultaneously only for the signal of telecommunication corresponding with the elevation angle of mobile terminal 300 produced for gravity induction module 303, in other embodiments, gravity sensing module 303 can be set to obtain value corresponding to the elevation angle of other mobile terminals 300 according to practical application.
Processing module 302 is further used for the current institute measured value receiving gravity sensing module 303, and according to the current institute measured value of gravity sensing module 303, determine the elevation angle of mobile terminal 300, and judge whether the described elevation angle is greater than critical value, the light regime module 304 that judged result supported or opposed sends.Wherein, processing module 302 is according to the relation between gravity sensing module 303 measured values and the elevation angle of mobile terminal 300, determines the elevation angle residing for mobile terminal 300.The elevation angle of mobile terminal 300 is the angle of mobile terminal 300 and horizontal direction.Critical value is for carry out actual test in indoor environment to mobile terminal 300 in advance, the elevation value obtained, when the elevation angle of mobile terminal 300 is greater than this critical value, there is violent change with the change at the elevation angle in 301 measured values of the surround lighting induction module in mobile terminal 300.And according to actual conditions, this critical value generally between 30 ~ 60 degree, such as 40 degree, 45 degree, 50 degree etc.In present embodiment, in indoor environment, in advance actual measurement is carried out to the elevation angle of mobile terminal 300 and surround lighting induction module 301 measured values, in actual conditions, also there is the problem of the reception light cone of ambient light sensor, therefore measure the elevation angle of mobile terminal and the relation curve of ambient light sensor institute measured value that obtain as shown in Figure 3.Can obtain according to this relation curve, π/4 are approximated being greater than 0.75(0.75 at mobile terminal 300 elevation angle, be 45 degree) time, surround lighting induction module 301 measured values decline rapidly to the increase at the elevation angle, therefore this point to be judged as the critical point of surround lighting induction module 301 measured value acute variation, and using 45 degree of critical values as mobile terminal 300.
It should be noted that, although present embodiment is according to the relation determination critical value of mobile terminal in indoor environment 300 elevation angle and surround lighting induction module 301 measured values, do not affect the adjustment of screen backlight in outdoor environment.In outdoor environment, within the shorter time period, natural daylight intensity is substantially constant, and has isotropic character due to natural daylight, therefore being how many regardless of the elevation angle of mobile terminal 300, the surround lighting induction module 301 current institute measured value during this period of time is also substantially constant.Therefore, during this period of time, only need to arrange screen backlight once.Generally, mobile terminal 300 in using can not be in big-elevation state for a long time, so, as long as during this period of time, mobile terminal 300 (is greater than the sampling period of surround lighting induction module 301 and gravity sensing module 303 once momently, generally, the described sampling period is less than one second) be in little elevation angle state, screen backlight can be arranged correctly.
The judged result that backlight administration module 304 sends for receiving processing module 302, when the described elevation angle is less than or equal to critical value, environmentally photoinduction module 301 current institute measured value, and the first relation of surround lighting induction module 301 measured values preset and screen backlight brightness, determine corresponding screen backlight brightness and arrange.It should be noted that, in present embodiment, the first relation of surround lighting induction module 301 measured values and screen backlight brightness is set to linear positively related relation.Certainly, in other embodiments, first relation of surround lighting induction module 301 measured values and screen backlight brightness is not limited in linear positive correlation, first relation of surround lighting induction module 301 measured values and screen backlight brightness according to the actual conditions of mobile terminal 300 or environment for use, can carry out corresponding relation setting.Such as, this first relation is set to the relation of positively nonlinear correlation, and when surround lighting induction module 301 measured values are larger, the speed of screen backlight brightness change is less, and when surround lighting induction module 301 measured values are less, the speed of screen backlight brightness change greatly.
Backlight administration module 304 is further used for when the described elevation angle is greater than described critical value, control screen backlight illumination constant, or environmentally photoinduction module 301 current institute measured value, and the second relation of surround lighting induction module 301 measured values preset and screen backlight brightness, determine corresponding screen backlight brightness and arrange, in described second relation, screen backlight brightness is little with the speed of surround lighting induction module 301 measured value changes with screen backlight brightness in speed ratio first relation of surround lighting induction module 301 measured value changes.
When the elevation angle of mobile terminal 300 is greater than critical value, there is violent change in 301 measured values of the surround lighting induction module in mobile terminal 300 with the change at the elevation angle.In present embodiment, the screen backlight change of mobile terminal 300 is the linear positive correlation changes of surround lighting induction module 301 measured values, therefore produce violent change due to the slight change at the elevation angle in order to avoid the screen backlight of mobile terminal 300, when mobile terminal 300 elevation angle is greater than critical value, it is constant that backlight administration module 304 controls screen backlight illumination.
Or backlight administration module 304 pre-sets the second relation of surround lighting induction module 301 measured values and screen backlight brightness, and according to the surround lighting induction module 301 current institute measured value got, determine and the screen backlight brightness of mobile terminal 300 is set.In present embodiment, second relation of surround lighting induction module 301 measured values and screen backlight brightness is also set to linear positive correlation, certainly, in other embodiments, second relation of surround lighting induction module 301 measured values and screen backlight brightness is also not limited in linear positive correlation, second relation of surround lighting induction module 301 measured values and screen backlight brightness according to the actual conditions of mobile terminal 300 or environment for use, can carry out corresponding relation setting.But it should be noted that in the second relation, screen backlight brightness must be less with the speed of surround lighting induction module 301 measured values changes than the first Central Shanxi Plain screen backlight brightness with the speed that surround lighting induction module 301 measured values change.
Refer to Fig. 5, Fig. 5 is the structural representation of another execution mode of mobile terminal of the present invention.In present embodiment, mobile terminal 400 comprises surround lighting induction module 401, gravity sensing module 403, processing module 402, backlight administration module 404 and logging modle 405.Wherein, surround lighting induction module 401, gravity sensing module 403, processing module 402, backlight administration module 404 and the surround lighting induction module 301 in upper execution mode, gravity sensing module 303, processing module 302, backlight administration module 304 are consistent, therefore describe about the related text that the detailed description of surround lighting induction module 401, gravity sensing module 403, processing module 402, backlight administration module 404 please refer to upper execution mode, do not repeat them here.
The judged result that logging modle 405 sends for receiving processing module 402, when the described elevation angle is less than or equal to critical value, record surround lighting induction module 401 current institute measured value, after obtaining surround lighting induction module 401 measured values at next mobile terminal 400, do to compare with threshold value after difference with the institute's measured value newly obtained, realize, when 401 the measured value changes of surround lighting induction module are less than threshold value, do not carry out the setting to screen backlight, avoiding the frequent setting that screen backlight is unnecessary.
Be different from prior art, the present invention is by the residing elevation angle of gravity sensing module determination mobile terminal, when judging that the described elevation angle is greater than critical value, control the constant rear variable quantity of screen backlight illumination less, avoid in indoor environment, when the elevation angle residing for mobile terminal is greater than critical value, there is the situation of violent change in screen backlight thereupon, optimizes the experience of user.Meanwhile, the present invention, when the change of surround lighting induction module institute measured value is greater than threshold value, just carries out judging to arrange screen backlight according to the elevation angle, avoids the frequent setting that screen backlight is unnecessary, improve the stability of screen backlight.
The foregoing is only embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.

Claims (10)

1. adjust a method for screen backlight, it is characterized in that, comprise the following steps:
Mobile terminal ambient light transducer current institute measured value described in acquisition for mobile terminal, and judge whether described ambient light sensor current institute measured value is greater than threshold value with the difference of the last ambient light sensor institute measured value obtained;
If described ambient light sensor current institute measured value is greater than threshold value with the difference of the last ambient light sensor institute measured value obtained, described mobile terminal then obtains gravity sensor current institute measured value in mobile terminal;
Described mobile terminal, according to described gravity sensor current institute measured value, determines the elevation angle residing for mobile terminal, and judges whether the described elevation angle is greater than critical value;
If the described elevation angle is less than or equal to described critical value, described mobile terminal is then according to described ambient light sensor current institute measured value, and the first relation of the ambient light sensor institute's measured value preset and screen backlight brightness, determine corresponding screen backlight brightness and arrange; If the described elevation angle is greater than described critical value, it is constant that described mobile terminal controls screen backlight illumination, or according to described ambient light sensor current institute measured value, and the second relation of the ambient light sensor institute's measured value preset and screen backlight brightness, determine corresponding screen backlight brightness and arrange, in described second relation, screen backlight brightness is little with the speed of ambient light sensor institute measured value change with screen backlight brightness in speed ratio first relation of ambient light sensor institute measured value change.
2. method according to claim 1, is characterized in that, when the described elevation angle is less than or equal to described critical value,
Described mobile terminal is then according to described ambient light sensor current institute measured value, and the first relation of ambient light sensor institute's measured value and the screen backlight brightness preset, determines the screen backlight brightness of correspondence and comprises after carrying out the step arranged:
Ambient light sensor current institute measured value described in described mobile terminal records.
3. method according to claim 1, is characterized in that, comprises before the step of mobile terminal ambient light transducer current institute measured value described in described acquisition for mobile terminal:
Described mobile terminal is according to the relation of the elevation angle of mobile terminal with corresponding ambient light sensor institute measured value, determine the critical value at the elevation angle, wherein, when the elevation angle of described mobile terminal is greater than described critical value, described ambient light sensor institute measured value declines rapidly with the increase at the described elevation angle.
4. method according to claim 1, is characterized in that, described critical value is between 30 ~ 60 degree.
5. method according to claim 4, is characterized in that, described critical value is 40 degree, 45 degree or 50 degree.
6. a mobile terminal, is characterized in that, comprises surround lighting induction module, gravity sensing module, processing module and backlight administration module;
Described surround lighting induction module for obtaining the value corresponding with current environment luminous intensity as current institute measured value, and sends the current institute measured value of surround lighting induction module to described processing module;
Described processing module is for receiving the current institute measured value of described surround lighting induction module, and judge whether the difference of described surround lighting induction module current institute measured value and last surround lighting induction module institute measured value is greater than threshold value, judged result is sent to described gravity sensing module;
Described gravity sensing module is used for the judged result that receiving processing module sends, described surround lighting induction module current institute measured value with on the difference of surround lighting induction module institute measured value that once obtains be greater than threshold value time, obtain the value corresponding with the described mobile terminal elevation angle as current institute measured value, and send to described processing module;
Described processing module is further used for the current institute measured value receiving described gravity sensing module, and according to the current institute measured value of described gravity sensing module, determine the elevation angle of described mobile terminal, and judge whether the described elevation angle is greater than critical value, the light regime module that judged result supported or opposed sends;
Described backlight administration module is used for the judged result that receiving processing module sends, when the described elevation angle is less than or equal to critical value, according to described surround lighting induction module current institute measured value, and the first relation of the surround lighting induction module institute's measured value preset and screen backlight brightness, determine corresponding screen backlight brightness and arrange; When the described elevation angle is greater than described critical value, control screen backlight illumination constant, or according to described surround lighting induction module current institute measured value, and the second relation of the surround lighting induction module institute's measured value preset and screen backlight brightness, determine corresponding screen backlight brightness and arrange, in described second relation, screen backlight brightness is little with the speed of surround lighting induction module institute measured value change with screen backlight brightness in speed ratio first relation of surround lighting induction module institute measured value change.
7. mobile terminal according to claim 6, it is characterized in that, also comprise logging modle, described logging modle is used for the judged result that receiving processing module sends, when the described elevation angle is less than or equal to critical value, record described surround lighting induction module current institute measured value.
8. mobile terminal according to claim 6, is characterized in that, described critical value is between 30 ~ 60 degree.
9. mobile terminal according to claim 8, is characterized in that, described critical value is 40 degree, 45 degree or 50 degree.
10. mobile terminal according to claim 6, is characterized in that, described surround lighting induction module is ambient light sensor, and described ambient light sensor is for obtaining the signal of telecommunication corresponding with current environment luminous intensity as current institute measured value;
Described gravity sensing module is gravity sensor, and described gravity sensor is for obtaining the signal of telecommunication corresponding with the elevation angle of described mobile terminal as current institute measured value.
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