CN103327148A - Screen backlight brightness adjusting implementation method based on mobile terminal and mobile terminal - Google Patents
Screen backlight brightness adjusting implementation method based on mobile terminal and mobile terminal Download PDFInfo
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- CN103327148A CN103327148A CN2013102662948A CN201310266294A CN103327148A CN 103327148 A CN103327148 A CN 103327148A CN 2013102662948 A CN2013102662948 A CN 2013102662948A CN 201310266294 A CN201310266294 A CN 201310266294A CN 103327148 A CN103327148 A CN 103327148A
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Abstract
The invention discloses a screen backlight brightness adjusting implementation method based on a mobile terminal and the mobile terminal. The screen backlight brightness adjusting implementation method based on the mobile terminal comprises the following steps of reading a first brightness value of a front ambient light sensor and a second brightness value of a rear ambient light sensor, conducting automatic-control brightness increase on screen backlight if the difference value between the second brightness value and the first brightness value is larger than a preset threshold value and is a positive value, and conducting automatic-control brightness decrease on the screen backlight if the difference value between the second brightness value and the first brightness value is larger than the preset threshold value and is not a positive value. According to the mobile terminal, one ambient light sensor is additionally arranged on the back portion of the mobile terminal and used for sensing ambient light coming from the rear of the mobile terminal, and therefore the mobile terminal has a new function that the mobile terminal can dynamically adjust the brightness of the screen backlight of a mobile phone according to the difference between front ambient light and rear ambient light. Therefore, the better backlight adjustment effect is achieved, and great convenience is brought to a user.
Description
Technical field
The present invention relates to field of mobile terminals, in particular a kind of implementation method and portable terminal of adjusting screen backlight brightness based on portable terminal.
Background technology
Along with the development of mobile communication technology and improving constantly of life living standard, the use of mobile phone is more and more universal, and mobile phone has become in the people life can not be few means of communication.
The mobile phone of prior art generally has only the screen top to place an ambient light sensor, can only respond to from the user is facial and beat to the environmental light brightness of mobile phone screen direction; Yet human eye also can obtain the surround lighting from the mobile phone rear, and when the light-intensity difference of both direction is bigger (typical example, summer outdoor tree shade under), it is unreasonable to cause screen backlight to be regulated.For example, from the user facial beat to the light ratio of mobile phone screen direction a little less than, and when more intense from the light at mobile phone rear, the beam intensity ratio that the ambient light sensor of mobile phone screen top is sensed a little less than, usually the screen backlight control method can be turned down backlight illumination to reduce too high demonstration contrast, save electric weight simultaneously, but at this moment human eye also can receive from the stronger light in mobile phone rear, human eye but needs the more screen display of high-contrast at this moment, this just causes human eye to differentiate the screen display content difficulty, even can not see clearly.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
The technical problem to be solved in the present invention is, above-mentioned defective at prior art, a kind of implementation method and portable terminal of adjusting screen backlight brightness based on portable terminal is provided, employing is installed an ambient light sensor additional at the portable terminal back, perception is from the surround lighting at portable terminal rear, dynamically adjust the mobile phone screen backlight illumination according to the surround lighting difference before and after the mobile phone, reach better adjustment effect backlight, provide users with the convenient.
The technical scheme that technical solution problem of the present invention adopts is as follows:
A kind of implementation method based on the brightness of portable terminal adjustment screen backlight wherein, comprises step:
A, a preposition ambient light sensor is set in the front of portable terminal, and at the back side of portable terminal one rearmounted ambient light sensor is set;
B, to read preposition ambient light sensor environmental light brightness value be first brightness value, and to read rearmounted ambient light sensor environmental light brightness value be second brightness value;
C, judge that whether the difference of described second brightness value and first brightness value is greater than a reservation threshold;
D, when the difference of judging described second brightness value and first brightness value greater than described reservation threshold, and the difference that described second brightness value deducts first brightness value on the occasion of, the environment bright of then judging the portable terminal rear is spent bright, and control lightens screen backlight automatically;
When the difference of judging described second brightness value and first brightness value greater than described reservation threshold, and the difference that described second brightness value deducts first brightness value on the occasion of, judge that then the environment bright at portable terminal rear spends secretly, it is backlight that control dims the bright screen curtain automatically.
Described implementation method based on the brightness of portable terminal adjustment screen backlight, wherein, first brightness value among the described step B is A1, second brightness value is A2.
Described implementation method based on the brightness of portable terminal adjustment screen backlight, wherein, described step D comprises:
When the difference of judging the described second brightness value A1 and the first brightness value A2 greater than described reservation threshold, and the difference that the described second brightness value A2 deducts the first brightness value A1 on the occasion of the time, judge that then the environment bright at portable terminal rear spends bright, and establish adjustment benchmark=A2+|A2-A1|/2, serve as to adjust benchmark control to lighten screen backlight with the value of A2+|A2-A1|/2.
Described implementation method based on the brightness of portable terminal adjustment screen backlight, wherein, described step D also comprises
When the difference of judging the described second brightness value A2 and the first brightness value A1 greater than described reservation threshold, and when the difference that the described second brightness value A2 deducts the first brightness value A1 is negative value, judge that then the environment bright at portable terminal rear spends secretly, and establish adjustment benchmark=A1-|A1-A2|/2, serve as to adjust benchmark control to dim the bright screen curtain backlight with the value of A1-|A1-A2|/2.
A kind of portable terminal comprises primary processor, wherein, also comprises: the preposition ambient light sensor that is arranged on the portable terminal front that is connected with described primary processor respectively and the rearmounted ambient light sensor that is arranged on the portable terminal back side;
Described primary processor comprises:
Read module, being used for reading preposition ambient light sensor environmental light brightness value is first brightness value, and to read rearmounted ambient light sensor environmental light brightness value be second brightness value;
Judge module is used for judging that whether the difference of described second brightness value and first brightness value is greater than a reservation threshold;
The automatic adjustment module of backlight illumination, be used for working as the difference of described second brightness value of judgement and first brightness value greater than described reservation threshold, and the difference that described second brightness value deducts first brightness value on the occasion of, the environment bright of then judging the portable terminal rear is spent bright, and control lightens screen backlight automatically; When the difference of judging described second brightness value and first brightness value greater than described reservation threshold, and the difference that described second brightness value deducts first brightness value on the occasion of, judge that then the environment bright at portable terminal rear spends secretly, it is backlight that control dims the bright screen curtain automatically;
Described read module, judge module, the automatic adjustment module of backlight illumination connect successively.
Described portable terminal, wherein, the automatic adjustment module of described backlight illumination comprises:
First regulon, be used for working as the difference of the described second brightness value A1 of judgement and the first brightness value A2 greater than described reservation threshold, and the difference that the described second brightness value A2 deducts the first brightness value A1 on the occasion of the time, judge that then the environment bright at portable terminal rear spends bright, and establish adjustment benchmark=A2+|A2-A1|/2, serve as to adjust benchmark control to lighten screen backlight with the value of A2+|A2-A1|/2.
Described portable terminal, wherein, the automatic adjustment module of described backlight illumination also comprises:
Second regulon, be used for working as the difference of the described second brightness value A2 of judgement and the first brightness value A1 greater than described reservation threshold, and when the difference that the described second brightness value A2 deducts the first brightness value A1 is negative value, judge that then the environment bright at portable terminal rear spends secretly, and establish adjustment benchmark=A1-|A1-A2|/2, serve as to adjust benchmark control to dim the bright screen curtain backlight with the value of A1-|A1-A2|/2.
Implementation method and the portable terminal of adjusting screen backlight brightness based on portable terminal provided by the present invention, employing is installed an ambient light sensor additional at the portable terminal back, perception is from the surround lighting at portable terminal rear, make portable terminal increase new function: can dynamically adjust the mobile phone screen backlight illumination according to the surround lighting difference before and after the mobile phone, reach better adjustment effect backlight, provide users with the convenient.
Description of drawings
Fig. 1 the present invention is based on the flow chart of preferred embodiment that portable terminal is adjusted the implementation method of screen backlight brightness.
Fig. 2 is the embodiment functional schematic block diagram of portable terminal of the present invention.
Fig. 3 is the primary processor built-in function theory diagram of the embodiment of portable terminal of the present invention.
Fig. 4 the present invention is based on the LCD brightness curve schematic diagram that portable terminal is adjusted first kind of scene of implementation method of screen backlight brightness.
Fig. 5 the present invention is based on the LCD brightness curve schematic diagram that portable terminal is adjusted second kind of scene of implementation method of screen backlight brightness.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, clear and definite, below develop simultaneously with reference to accompanying drawing that the present invention is described in more detail for embodiment.Should be appreciated that specific embodiment described herein only in order to explaining the present invention, and be not used in restriction the present invention.
See also Fig. 1, Fig. 1 the present invention is based on the flow chart of preferred embodiment that portable terminal is adjusted the implementation method of screen backlight brightness.
As shown in Figure 1, described implementation method based on the brightness of portable terminal adjustment screen backlight may further comprise the steps:
Step S100, a preposition ambient light sensor is set in the front of portable terminal, and at the back side of portable terminal one rearmounted ambient light sensor is set;
In the present embodiment, described portable terminal is mobile phone, and a preposition ambient light sensor need be set in described mobile phone front, and at the back side of mobile phone one rearmounted ambient light sensor is set.Preposition ambient light sensor setting is positioned at screen top, can with proximity transducer near or be arranged in same module, be used for the ambient light that induction shines the mobile phone screen face; Rearmounted transducer is positioned at difficult position of being blocked by hand, mobile phone top, is used for the ambient light that induction shines the mobile phone back.
Step S200, to read preposition ambient light sensor environmental light brightness value be first brightness value, and to read rearmounted ambient light sensor environmental light brightness value be second brightness value.
For example can read preposition ambient light sensor environmental light brightness value by the primary processor of mobile phone is first brightness value, and to read rearmounted ambient light sensor environmental light brightness value be second brightness value.
Step S300, judge that whether the difference of described second brightness value and first brightness value is greater than a reservation threshold.
In the present embodiment, when read the environmental light brightness value that preposition and rearmounted ambient light sensor obtains by primary processor, whether greater than a reservation threshold, judge that the mobile phone light uses scene according to the difference of two detected environmental light brightness values of transducer, specific as follows.
Step S400, when the difference of judging described second brightness value and first brightness value greater than described reservation threshold, and the difference that described second brightness value deducts first brightness value on the occasion of, the environment bright of then judging the portable terminal rear is spent bright, and control lightens screen backlight automatically;
Namely when more intense from the light at mobile phone rear, and the beam intensity ratio that the ambient light sensor of mobile phone screen top is sensed a little less than, the backlight illumination that the environmental light brightness value that obtains according to preposition ambient light sensor in the embodiment of the invention arranges is low excessively, cause the screen display contrast low excessively, human eye but needs the more screen display of high-contrast at this moment, this just causes human eye to differentiate the screen display content difficulty, even can not see clearly, and this needs to lighten screen backlight at present.Namely the integrated value according to preposition ambient light sensor and rearmounted ambient light sensor brightness readjusts screen backlight brightness.
For example, it is A1 that described first brightness value can be set, and second brightness value is A2.And ought judge that the difference of the described second brightness value A1 and the first brightness value A2 is greater than described reservation threshold, and the difference that the described second brightness value A2 deducts the first brightness value A1 on the occasion of the time, judge that then the environment bright at portable terminal rear spends bright, and establish adjustment benchmark=A2+|A2-A1|/2, serve as to adjust benchmark control to lighten screen backlight with the value of A2+|A2-A1|/2.
Wherein, if adjust benchmark=A2+|A2-A1|/2, value with A2+|A2-A1|/2 serves as to adjust the step that benchmark control lightens screen backlight, reference ambient light illumination and LCD brightness curve figure shown in Figure 4 during concrete enforcement, the unit of transverse axis ambient light illumination is the brightness value that the transducer device reads among Fig. 4, it is relative value, it or not brill, the unit of longitudinal axis LCD brightness is that nits(nit (nits) is brill), as | A2-A1| during greater than a certain threshold value, if A2〉A1, then according to original LCD brightness curve shown in Figure 4 LCD brightness value on the curve that the current LCD brightness value is transverse axis A2+|A2-A1|/2 correspondence is set; For example, A1=350, A2=800, | A2-A1|=450〉threshold value 300, and A2-A1=450, judge that then the brightness at portable terminal rear is bright excessively, LCD brightness value on the curve that current LCD brightness is transverse axis A2+|A2-A1|/2=1025 point correspondence is set this moment, be approximately 390nits, LCD brightness has been adjusted to 390nits by the corresponding about 270nits of A1 point, has strengthened screen intensity.
Another kind of situation is: when the difference of judging described second brightness value and first brightness value greater than described reservation threshold, and the difference that described second brightness value deducts first brightness value on the occasion of, judge that then the environment bright at portable terminal rear spends secretly, it is backlight that control dims the bright screen curtain automatically.
Namely when darker from the light ratio at mobile phone rear, and the light intensity that the ambient light sensor of mobile phone screen top is sensed is more intense, present embodiment adopts the backlight illumination of the environmental light brightness value setting that obtains according to preposition ambient light sensor too high, cause the screen display contrast too high, more dazzling, human eye but needs the screen display situation than low contrast at this moment.Need dim screen backlight.
For example, when the difference of judging the described second brightness value A2 and the first brightness value A1 greater than described reservation threshold, and when the difference that the described second brightness value A2 deducts the first brightness value A1 is negative value, judge that then the environment bright at portable terminal rear spends secretly, and establish adjustment benchmark=A1-|A1-A2|/2, serve as to adjust benchmark control to dim the bright screen curtain backlight with the value of A1-|A1-A2|/2.
Wherein, establishing adjustment benchmark=A1-|A1-A2|/2, serves as to adjust benchmark control to dim in the bright screen curtain step backlight with the value of A1-|A1-A2|/2, when specifically implementing, with reference to ambient light illumination and the LCD brightness curve figure of second scene shown in Figure 5.Wherein the unit of transverse axis ambient light illumination is the brightness value that the transducer device reads, it is relative value, it or not brill, the unit of longitudinal axis LCD brightness is nits, as | A2-A1| during greater than a certain threshold value, if A1〉A2, then according to original LCD brightness curve shown in Figure 5 LCD brightness value on the curve that the current LCD brightness value is transverse axis A1-|A1-A2|/2 correspondence is set; For example, A2=350, A1=800, | A2-A1|=450〉threshold value 300, and A1-A2=450, judge that then the brightness at portable terminal rear is bright excessively, LCD brightness value on the curve that current LCD brightness is transverse axis A1-|A1-A2|/2=575 point correspondence is set this moment, be approximately 320nits, LCD brightness has been adjusted to 320nits by the corresponding about 360nits of A1 point, has reduced screen intensity.
Therefore, the method of the embodiment of the invention adopts and installs an ambient light sensor additional at the portable terminal back, perception is from the surround lighting at portable terminal rear, dynamically adjust the mobile phone screen backlight illumination according to the surround lighting difference before and after the mobile phone, reach better adjustment effect backlight, provide users with the convenient.
Based on above-described embodiment, the present invention also provides a kind of embodiment of portable terminal, as shown in Figure 2, described portable terminal 500, comprise primary processor 510, also comprise: the preposition ambient light sensor 520 that is arranged on the portable terminal front that is connected with described primary processor 510 and the rearmounted ambient light sensor 530 that is arranged on the portable terminal back side respectively;
Wherein, as shown in Figure 3, described primary processor 510 comprises:
Read module 511, being used for reading preposition ambient light sensor environmental light brightness value is first brightness value, and to read rearmounted ambient light sensor environmental light brightness value be second brightness value; Specifically as described in the above-mentioned step S200.
The automatic adjustment module 513 of backlight illumination, be used for working as the difference of described second brightness value of judgement and first brightness value greater than described reservation threshold, and the difference that described second brightness value deducts first brightness value on the occasion of, the environment bright of then judging the portable terminal rear is spent bright, and control lightens screen backlight automatically; When the difference of judging described second brightness value and first brightness value greater than described reservation threshold, and the difference that described second brightness value deducts first brightness value on the occasion of, judge that then the environment bright at portable terminal rear spends secretly, it is backlight that control dims the bright screen curtain automatically; Specifically as described in the above-mentioned step S400
Described read module 511, judge module 512, the automatic adjustment module 513 of backlight illumination connect successively.
Wherein, the automatic adjustment module of described backlight illumination comprises:
First regulon, be used for working as the difference of the described second brightness value A1 of judgement and the first brightness value A2 greater than described reservation threshold, and the difference that the described second brightness value A2 deducts the first brightness value A1 on the occasion of the time, judge that then the environment bright at portable terminal rear spends bright, and establish adjustment benchmark=A2+|A2-A1|/2, serve as to adjust benchmark control to lighten screen backlight with the value of A2+|A2-A1|/2.
Second regulon, be used for working as the difference of the described second brightness value A2 of judgement and the first brightness value A1 greater than described reservation threshold, and when the difference that the described second brightness value A2 deducts the first brightness value A1 is negative value, judge that then the environment bright at portable terminal rear spends secretly, and establish adjustment benchmark=A1-|A1-A2|/2, serve as to adjust benchmark control to dim the bright screen curtain backlight with the value of A1-|A1-A2|/2.
In sum, implementation method and the portable terminal of adjusting screen backlight brightness based on portable terminal provided by the present invention, employing is installed an ambient light sensor additional at the portable terminal back, perception is from the surround lighting at portable terminal rear, make portable terminal increase new function: can dynamically adjust the mobile phone screen backlight illumination according to the surround lighting difference before and after the mobile phone, reach better adjustment effect backlight, provide users with the convenient.
Should be understood that application of the present invention is not limited to above-mentioned giving an example, for those of ordinary skills, can be improved according to the above description or conversion that all these improvement and conversion all should belong to the protection range of claims of the present invention.
Claims (7)
1. the implementation method based on the brightness of portable terminal adjustment screen backlight is characterized in that, comprises step:
A, a preposition ambient light sensor is set in the front of portable terminal, and at the back side of portable terminal one rearmounted ambient light sensor is set;
B, to read preposition ambient light sensor environmental light brightness value be first brightness value, and to read rearmounted ambient light sensor environmental light brightness value be second brightness value;
C, judge that whether the difference of described second brightness value and first brightness value is greater than a reservation threshold;
D, when the difference of judging described second brightness value and first brightness value greater than described reservation threshold, and the difference that described second brightness value deducts first brightness value on the occasion of, the environment bright of then judging the portable terminal rear is spent bright, and control lightens screen backlight automatically;
When the difference of judging described second brightness value and first brightness value greater than described reservation threshold, and the difference that described second brightness value deducts first brightness value on the occasion of, judge that then the environment bright at portable terminal rear spends secretly, it is backlight that control dims the bright screen curtain automatically.
2. the implementation method based on the brightness of portable terminal adjustment screen backlight according to claim 1 is characterized in that first brightness value among the described step B is A1, and second brightness value is A2.
3. according to claim 2ly adjust the implementation method of screen backlight brightness based on portable terminal, it is characterized in that described step D comprises:
When the difference of judging the described second brightness value A1 and the first brightness value A2 greater than described reservation threshold, and the difference that the described second brightness value A2 deducts the first brightness value A1 on the occasion of the time, judge that then the environment bright at portable terminal rear spends bright, and establish adjustment benchmark=A2+|A2-A1|/2, serve as to adjust benchmark control to lighten screen backlight with the value of A2+|A2-A1|/2.
4. the implementation method based on the brightness of portable terminal adjustment screen backlight according to claim 2 is characterized in that described step D also comprises
When the difference of judging the described second brightness value A2 and the first brightness value A1 greater than described reservation threshold, and when the difference that the described second brightness value A2 deducts the first brightness value A1 is negative value, judge that then the environment bright at portable terminal rear spends secretly, and establish adjustment benchmark=A1-|A1-A2|/2, serve as to adjust benchmark control to dim the bright screen curtain backlight with the value of A1-|A1-A2|/2.
5. a portable terminal comprises primary processor, it is characterized in that, also comprises: the preposition ambient light sensor that is arranged on the portable terminal front that is connected with described primary processor respectively and the rearmounted ambient light sensor that is arranged on the portable terminal back side;
Described primary processor comprises:
Read module, being used for reading preposition ambient light sensor environmental light brightness value is first brightness value, and to read rearmounted ambient light sensor environmental light brightness value be second brightness value;
Judge module is used for judging that whether the difference of described second brightness value and first brightness value is greater than a reservation threshold;
The automatic adjustment module of backlight illumination, be used for working as the difference of described second brightness value of judgement and first brightness value greater than described reservation threshold, and the difference that described second brightness value deducts first brightness value on the occasion of, the environment bright of then judging the portable terminal rear is spent bright, and control lightens screen backlight automatically; When the difference of judging described second brightness value and first brightness value greater than described reservation threshold, and the difference that described second brightness value deducts first brightness value on the occasion of, judge that then the environment bright at portable terminal rear spends secretly, it is backlight that control dims the bright screen curtain automatically;
Described read module, judge module, the automatic adjustment module of backlight illumination connect successively.
6. portable terminal according to claim 5 is characterized in that, the automatic adjustment module of described backlight illumination comprises:
First regulon, be used for working as the difference of the described second brightness value A1 of judgement and the first brightness value A2 greater than described reservation threshold, and the difference that the described second brightness value A2 deducts the first brightness value A1 on the occasion of the time, judge that then the environment bright at portable terminal rear spends bright, and establish adjustment benchmark=A2+|A2-A1|/2, serve as to adjust benchmark control to lighten screen backlight with the value of A2+|A2-A1|/2.
7. portable terminal according to claim 5 is characterized in that, the automatic adjustment module of described backlight illumination also comprises:
Second regulon, be used for working as the difference of the described second brightness value A2 of judgement and the first brightness value A1 greater than described reservation threshold, and when the difference that the described second brightness value A2 deducts the first brightness value A1 is negative value, judge that then the environment bright at portable terminal rear spends secretly, and establish adjustment benchmark=A1-|A1-A2|/2, serve as to adjust benchmark control to dim the bright screen curtain backlight with the value of A1-|A1-A2|/2.
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