CN103051812A - Method for realizing energy saving through automatically adjusting backlight brightness of mobile phone screen - Google Patents
Method for realizing energy saving through automatically adjusting backlight brightness of mobile phone screen Download PDFInfo
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- CN103051812A CN103051812A CN2013100125233A CN201310012523A CN103051812A CN 103051812 A CN103051812 A CN 103051812A CN 2013100125233 A CN2013100125233 A CN 2013100125233A CN 201310012523 A CN201310012523 A CN 201310012523A CN 103051812 A CN103051812 A CN 103051812A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a method for realizing energy saving through automatically adjusting backlight brightness of a mobile phone screen. The method comprises the following steps of: extracting the histogram information of the brightness of each frame image by a central processing unit (CPU) of a mobile phone at a certain frequency; working out a mean brightness value of the image by the CPU; working out a backlight brightness value by the CPU according to the worked out mean brightness value of the image; and adjusting an actual backlight brightness value by the CPU according to the worked out backlight brightness value. A computational formula for the backlight brightness value is shown as follows: the mean brightness value of the image is divided by the maximum brightness value of the image to obtain a quotient, and then, the quotient is multiplied by the maximum brightness value of backlight to obtain the backlight brightness value. According to the method disclosed by the invention, the power consumption of the mobile phone can be greatly reduced, and moreover, the contrast ratio of a display frame of the mobile phone is improved.
Description
Technical field
The present invention relates to the mobile phone application, particularly a kind of by the energy-conservation method of automatic adjusting cellphone screen backlight brightness realization.
Background technology
At present, smart mobile phone is more and more universal, the function of mobile phone also from strength to strength, the user more and more relies on mobile phone and participates in various application, mobile phone has become in the life must obligato media of communication, and for example people utilize mobile phone in time to communicate by letter (IM), play the interactive network game, receive various Push information, participate in interacting Question-Answer etc.
Yet, a significant problem is, the flying power of battery of mobile phone is not caught up with and is used diversification and complicated step, raising along with socioeconomic development and people's living standard, energy-conserving and environment-protective have become the theme that society is appealed, therefore, what the consumption control of adversary's function and energy-conservation research also became social development must be through process, how to allow limited battery flying power not waste as far as possible, thereby can support more, more complicated, as to need longer time power supply application, become a focus.
Existing technical scheme is mostly according to the input of mobile phone, the for example activity of keyboard, touch-screen, judge whether to adopt energy-saving scheme, for example in the time of frequency key pressing, allow operating handset at " optimum performance " state, and in a period of time without any when input, allow operating handset in energy-saving mode, for example screen backlight is closed, the processor frequency reducing, this according to the people behavior pattern and the mode of input condition can be to a certain degree the unnecessary energy content of battery of reduction, but can't reduce to greatest extent the unnecessary energy content of battery.
Also have a kind of energy-conservation be by checking surround lighting, backlight according to the brightness region adjusting cellphone of surround lighting again, generally, the backlight illumination of mobile phone is in maximum always, the bright dark what state of the picture material of its screen display no matter, have a strong impact on the quality of image, also increased the power consumption of mobile phone simultaneously.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, come adjusting backlight luminance to realize energy-conservation a kind ofly realizing energy-conservation method by automatic adjusting screen luminance of mobile phone thereby provide a kind of by the average brightness value that checks every two field picture.
The objective of the invention is to be achieved through the following technical solutions: a kind of by the energy-conservation method of automatic adjusting cellphone screen backlight brightness realization, it may further comprise the steps:
S11:CPU extracts the histogram information of the brightness of every two field picture by certain frequency;
S12:CPU calculates the average brightness value of this image;
S13:CPU calculates backlight brightness values according to the average brightness value of the image that calculates;
S14:CPU regulates actual backlight brightness values according to the backlight brightness values that calculates.
The histogram information of the brightness of image of the present invention comprises brightness minimum value and brightness maximum.
The method of the average brightness value of this image of calculating of the present invention is:
S21:CPU reads total number of pixels A;
S22: every two field picture brightness is divided into 32 rank, and CPU reads respectively the number of pixels Bn on adjacent two rank, n=0～15;
S23:CPU calculate whole all pixels of image brightness and: D=∑ Bn*Cn, Cn are the virtual value of brightness, and scope is 0～15;
S24:CPU calculates the average brightness value of each pixel: E=D/A.
The method of calculating backlight brightness values of the present invention is: the maximum brightness value that the maximum brightness value * of the average brightness value/image of current backlight brightness value=present image is backlight.
The invention has the beneficial effects as follows: come adjusting backlight luminance by the average brightness value that detects every two field picture, when the mean picture brightness that shows is large, improve mobile phone backlight brightness, the mean picture brightness that shows hour, reduce mobile phone backlight brightness, the present invention can greatly reduce mobile telephone power consumption, and can improve the contrast of mobile phone display surface face.
Description of drawings
Fig. 1 is realization flow figure of the present invention;
Fig. 2 is the flow chart of calculating average brightness value of the present invention.
Embodiment
Below in conjunction with accompanying drawing technical scheme of the present invention is described in further detail, but protection scope of the present invention is not limited to the following stated.
As shown in Figure 1, a kind of by the energy-conservation method of automatic adjusting cellphone screen backlight brightness realization, it may further comprise the steps:
S11:CPU extracts the histogram information of the brightness of every two field picture by certain frequency;
S12:CPU calculates the average brightness value of this image;
S13:CPU calculates backlight brightness values according to the average brightness value of the image that calculates;
S14:CPU regulates actual backlight brightness values according to the backlight brightness values that calculates.
The histogram information of the brightness of image of the present invention comprises brightness minimum value and brightness maximum.
As shown in Figure 2, the method for the average brightness value of this image of calculating of the present invention is:
S21:CPU reads total number of pixels A;
S22: every two field picture brightness is divided into 32 rank, and CPU reads respectively the number of pixels Bn on adjacent two rank, n=0～15;
S23:CPU calculate whole all pixels of image brightness and: D=∑ Bn*Cn, Cn are the virtual value of brightness, and scope is 0～15;
S24:CPU calculates the average brightness value of each pixel: E=D/A.
The method of calculating backlight brightness values of the present invention is: the maximum brightness value that the maximum brightness value * of the average brightness value/image of current backlight brightness value=present image is backlight.
The CPU of mobile phone take the regular hour (ms rank) as the cycle, the histogram information of the every two field picture of automatic acquisition, the brightness minimum value, maximum, thereby the mean flow rate of computed image, being calculated as follows of mean flow rate: suppose every two field picture is divided into 32 rank, histogram can represent the number of pixels that the brightness of every rank comprises clearly, CPU at first reads 32 rank number of pixels altogether, be designated as A, and then read respectively the number of pixels on adjacent two rank, be designated as Bn, the scope of n is 0～15, again Bn be multiply by corresponding brightness virtual value Cn, owing to calculate take 2 rank as unit, so 32 rank have become 16 rank, the scope of brightness virtual value is exactly 0～15 so, so the brightness of whole all pixels of picture and D=∑ Bn*Cn, n is 0～15, average brightness value E=D/A of each pixel so, the adjustable range of supposing the mobile phone backlight brightness value is 0～100, the backlight brightness values that calculates according to the mean flow rate of image is E*100/15, because the average brightness value of image is always less than or equal to brightness maximum 15, be E＜=15, all backlight brightness values only have when screen-picture is white less than or equal to 100, backlight brightness values is 15, generally, picture is not whole white, so the average brightness value of image is always less than 15, the screen backlight brightness value that obtains so is always less than 100, be that mobile phone backlight will can not be in high-high brightness always, thereby reduced power consumption, realized energy-conservation.
Claims (4)
1. realize energy-conservation method by automatic adjusting cellphone screen backlight brightness for one kind, it is characterized in that: it may further comprise the steps:
S11:CPU extracts the histogram information of the brightness of every two field picture by certain frequency;
S12:CPU calculates the average brightness value of this image;
S13:CPU calculates backlight brightness values according to the average brightness value of the image that calculates;
S14:CPU regulates actual backlight brightness values according to the backlight brightness values that calculates.
2. according to claim 1 a kind of by the energy-conservation method of automatic adjusting cellphone screen backlight brightness realization, it is characterized in that: the histogram information of the brightness of described image comprises brightness minimum value and brightness maximum.
3. according to claim 1 a kind of by the energy-conservation method of automatic adjusting cellphone screen backlight brightness realization, it is characterized in that: the method for the average brightness value of described this image of calculating is:
S21:CPU reads total number of pixels A;
S22: every two field picture brightness is divided into 32 rank, and CPU reads respectively the number of pixels Bn on adjacent two rank, n=0～15;
S23:CPU calculate whole all pixels of image brightness and: D=∑ Bn*Cn, Cn are the virtual value of brightness, and scope is 0～15;
S24:CPU calculates the average brightness value of each pixel: E=D/A.
4. according to claim 1 a kind of by the energy-conservation method of automatic adjusting cellphone screen backlight brightness realization, it is characterized in that: the method for described calculating backlight brightness values is: the maximum brightness value that the maximum brightness value * of the average brightness value/image of current backlight brightness value=present image is backlight.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103489430A (en) * | 2013-09-25 | 2014-01-01 | 深圳Tcl新技术有限公司 | Backlight luminance acquiring method and display |
| CN103531155A (en) * | 2013-10-09 | 2014-01-22 | 广东欧珀移动通信有限公司 | Method and unit for reducing power consumption of mobile device with video recording function in video recording |
| CN111522816A (en) * | 2020-04-16 | 2020-08-11 | 云和恩墨(北京)信息技术有限公司 | Data processing method, device, terminal and medium based on database engine |
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| CN101383139A (en) * | 2008-06-27 | 2009-03-11 | 青岛海信电器股份有限公司 | Luminance control method for display screen |
| CN101751874A (en) * | 2008-11-28 | 2010-06-23 | 康佳集团股份有限公司 | LCD TV intelligent dynamic backlight control method |
| CN101777311A (en) * | 2010-03-05 | 2010-07-14 | 青岛海信电器股份有限公司 | Dynamic backlight brightness control method |
| CN101877208A (en) * | 2010-06-29 | 2010-11-03 | 彩虹集团公司 | Control method of LED backlight |
| US20120162532A1 (en) * | 2009-08-31 | 2012-06-28 | Motoyuki Oniki | Liquid crystal display apparatus and television receiver |
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- 2013-01-14 CN CN201310012523.3A patent/CN103051812B/en not_active Expired - Fee Related
Patent Citations (6)
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| CN1750043A (en) * | 2005-08-22 | 2006-03-22 | 上海广电（集团）有限公司中央研究院 | Histogram equalizing method for controlling average brightness |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103489430A (en) * | 2013-09-25 | 2014-01-01 | 深圳Tcl新技术有限公司 | Backlight luminance acquiring method and display |
| CN103531155A (en) * | 2013-10-09 | 2014-01-22 | 广东欧珀移动通信有限公司 | Method and unit for reducing power consumption of mobile device with video recording function in video recording |
| CN111522816A (en) * | 2020-04-16 | 2020-08-11 | 云和恩墨(北京)信息技术有限公司 | Data processing method, device, terminal and medium based on database engine |
| CN111522816B (en) * | 2020-04-16 | 2021-04-30 | 云和恩墨(北京)信息技术有限公司 | Data processing method, device, terminal and medium based on database engine |
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| CN103051812B (en) | 2015-02-25 |
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Address after: Two Lu Tian Hua high tech Zone of Chengdu City, Sichuan province 610041 No. 219 Tianfu Software Park C District 12 building 6 layer Patentee after: Chengdu Xike Technology Co.,Ltd. Address before: The middle Tianfu Avenue in Chengdu city Sichuan province 610041 No. 765 talent Software Park A District No. 1 Building 2 room 214 Patentee before: Chengdu Xike Technology Co.,Ltd. |
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