CN103916935A - Backlight control system and control method of mobile terminal - Google Patents
Backlight control system and control method of mobile terminal Download PDFInfo
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- CN103916935A CN103916935A CN201210591680.XA CN201210591680A CN103916935A CN 103916935 A CN103916935 A CN 103916935A CN 201210591680 A CN201210591680 A CN 201210591680A CN 103916935 A CN103916935 A CN 103916935A
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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
Disclosed is a backlight control system for a mobile terminal and the system is used for controlling the display screen backlight of the mobile terminal. The system includes a baseband controller, and a front camera and a display screen luminance control module, which are electrically connected with the baseband controller respectively. The display screen luminance control module is electrically connected with a display screen. The front camera acquires image data of the mobile terminal under different modes. The baseband controller is electrically connected with the front camera and used for receiving image data sent by the front camera, comparing the luminance value of a shot picture with a preset luminance value or the minimum/maximum value of a preset luminance grade through analysis and measurement of the luminance value of a current shot image and sending a specific control instruction to the display screen luminance control module according to the comparison result and the communication state of a current mobile terminal so as to drive the display screen which is connected with the display screen luminance control module to adjust the screen backlight, wherein the communication state is a dialing state or a call-answering state. The invention also provides a backlight control method which adopts the control system.
Description
Technical field
The present invention relates to mechanics of communication equipment, refer to especially backlight control system and the control method of mobile terminal.
Background technology
Through development for many years, mobile terminal is quite universal in daily life, and people have been tending towards outward appearance and the diversified function mobile terminal of large display screen to the requirement of mobile terminal, and intelligent mobile terminal has become following development trend.
But the power consumption of Mobile phone with big size display screen is larger, if especially in call display backlight lamp stay open state always and can consume very large battery electric quantity, to such an extent as to affect the service time of mobile terminal.If mobile phone, in the time of normal running, can be adjusted according to extraneous light power the backlight illumination of display screen, in the situation that not affecting user's experience, reach the object of power saving; And equally in when call, especially when extended telephone conversation, close the power consumption that just can greatly reduce mobile phone backlight of display screen, meanwhile, can prevent the misoperation for touch-screen in communication process.
A kind of current method is on mobile terminal, to use optical sensor and the two-in-one module of infrared light proximity transducer, although this mode can solve the problem that display backlight is closed, but because infrared light transducer[sensor is very high to the designing requirement of structure, need to do in the position on the positive and close top of mobile terminal the loophole of two diameter 2mm left and right, the rubber sleeve of an isolation infrared light emission and reception also need to be set in inside.Optical sensor and the two-in-one module of infrared light proximity transducer not only take the space of PCB (printed circuit board (PCB)), and the loophole of opening affects the attractive in appearance of outward appearance, also can bring the increase of mobile terminal cost.
In sum, on mobile terminal, do not solve well the problem of display backlight switch and brilliance control at present.
Summary of the invention
Based on the deficiencies in the prior art, it is a kind of with lower cost that main purpose of the present invention is to provide, and realizes proximity transducer and optical sensor function, to realize backlight of mobile terminal control system and the control method of power saving object.
The invention provides a kind of backlight of mobile terminal control system, for regulating the display backlight of mobile terminal, it comprises baseband controller and the front-facing camera being electrically connected with it respectively and brightness of display screen control module, described brightness of display screen control module is electrically connected with display screen, wherein, described front-facing camera gathers the view data of mobile terminal under different mode; Described baseband controller, be electrically connected with front-facing camera, for receiving the view data that front-facing camera sends, record the brightness value of current taken the photograph image by analysis, the brightness value of taken the photograph image is compared with the minimum/maximum of default brightness value or default brightness degree, according to the communication state of comparative result and current mobile terminal, send specific control command to described brightness of display screen control module, to drive coupled described display screen to adjust screen backlight.Described communication state is dialing status or answers state.
At mobile terminal, under each state, the brightness value of the image of taking the photograph according to camera is compared with the minimum/maximum of default brightness value or default brightness degree, and the backlight of display screen controlled, and concrete control procedure is as follows:
When mobile terminal is in communication state, and the brightness value of described image is while being less than or equal to described default brightness value, and described baseband controller sends closes instruction backlight to described brightness of display screen control module, backlight to drive described display screen to close.
When mobile terminal is in communication state, and the brightness value of described image is while being greater than described default brightness value, and described baseband controller sends opens instruction backlight to described brightness of display screen control module, backlight to drive described display screen to open.
When mobile terminal is in communication state, and when the brightness value of described image is less than the minimum value of default brightness degree, described baseband controller sends and weakens instruction backlight to described brightness of display screen control module, to drive described display screen to weaken backlight illumination to low brightness levels.
When mobile terminal is in communication state, and when the brightness value of described image is greater than the maximum of default brightness degree, described baseband controller sends and strengthens instruction backlight to described brightness of display screen control module, to drive described display screen to strengthen backlight illumination to high brightness level.
Wherein, described communication state is dialing status or answers state.In the time of communication state, the brightness value of described image is 10-30lux.
The present invention also provides a kind of backlight of mobile terminal control method, and it comprises the following steps:
Step 1) judges the current state of mobile terminal by the state of call module:
If when call module is in running order, go to step 3);
If call module, in the time of non operating state, goes to step 4);
Step 2) automatically gather current image date by described front-facing camera, record the brightness value of current taken the photograph image by analysis, the brightness value of taken the photograph image is compared with default brightness value, obtain brightness comparative result;
Step 3) is in brightness comparative result, if the brightness value of described image is less than or equal to described default brightness value, described baseband controller sends and closes instruction backlight to described brightness of display screen control module, backlight to drive described display screen to close;
If the brightness value of described image is greater than described default brightness value, described baseband controller sends and opens instruction backlight to described brightness of display screen control module, backlight to drive described display screen to open;
Step 4) is in brightness comparative result, if when the brightness value of described image is less than the minimum value of default brightness degree, described baseband controller sends and weakens instruction backlight to described brightness of display screen control module, to drive described display screen to weaken backlight illumination to low brightness levels;
If when the brightness value of described image is greater than the maximum of default brightness degree, described baseband controller sends and strengthens instruction backlight to described brightness of display screen control module, to drive described display screen to strengthen backlight illumination to high brightness level.
Described control method further comprises that step 5) is when call module is during in non operating state, or brightness of display screen control module As-received tape controller sends while cutting out instruction backlight, send the instruction of closing camera to webcam driver by baseband controller, to close camera, stop calling backlight control code.
Compared with prior art, the present invention sends a telegram here backlight control system by adopting front-facing camera to gather current image date, and described view data is compared with preset value, in conjunction with the current state of mobile terminal, the backlight of display screen is controlled.Control procedure is more intelligent, hommization, has replaced the module such as existing optical sensor, infrared light proximity transducer, has simplified the structure of mobile terminal, has saved the arrangement space of PCB, has saved manufacturing cost.
Accompanying drawing explanation
Fig. 1 is the Organization Chart of mobile terminal of the present invention;
Fig. 2 is the flow chart that mobile terminal of the present invention is realized the proximity transducer course of work;
Fig. 3 is the flow chart that mobile terminal of the present invention is realized the optical sensor course of work.
Embodiment
Shown in Fig. 1, the invention provides a kind of backlight of mobile terminal control system 100, for regulating the display backlight of mobile terminal, it comprises baseband controller 1 and the front-facing camera 2 being electrically connected with it respectively and brightness of display screen control module 3, described brightness of display screen control module 3 is electrically connected with display screen 4, and described front-facing camera 2 gathers the view data of mobile terminal under different mode; Described baseband controller 1, be electrically connected with front-facing camera 2, for receiving the view data that front-facing camera 2 sends, record the brightness value of current taken the photograph image by analysis, the brightness value of taken the photograph image is compared with the minimum/maximum of default brightness value or default brightness degree, according to the communication state of comparative result and current mobile terminal, send specific control command to described brightness of display screen control module, to drive coupled described display screen to adjust screen backlight.
Wherein, described baseband controller 1 is connected with front-facing camera 2 and brightness of display screen control module 3 by data/address bus and the control line of parallel or serial, realizes the transmission of view data.Described front-facing camera 2 is for acquisition of image data, and sends it to described baseband controller 1 and carry out analyzing and processing; In described baseband controller 1, by test analysis software, gathered image is analyzed, obtain the brightness value of the current environment light reflecting in image, the brightness value of described image is compared with the minimum/maximum of default brightness value or default brightness degree, according to the communication state of comparative result and current mobile terminal, send specific control command to brightness of display screen control module 3, to drive coupled display screen 4 to adjust screen backlight.Described communication state is dialing status or answers state.In a preferred embodiment of the invention, in the time of communication state, the brightness value of described image is generally 10-30lux.Default brightness degree also can need to be adjusted setting according to user's habituation.
Below illustrate mobile terminal under various states, analyze relatively by the view data that front-facing camera 2 is gathered, according to the comparative result obtaining, send specific control command and drive display screen 4 to adjust screen backlight state.Described communication state is dialing status or answers state.
(1) when mobile terminal is in communication state, in the time that mobile terminal is pressed close to ear by user, the hair that front-facing camera 2 take the photographs are user or ear position, the brightness of image reduces, and when the brightness value of described image is less than or equal to described default brightness value, 1 transmission of baseband controller is closed instruction backlight to described brightness of display screen control module 3, backlight to drive described display screen 4 to close, to reduce power consumption;
(2) when mobile terminal is in communication state, and when the brightness value of described image is greater than described default brightness value, 1 transmission of described baseband controller is opened instruction backlight to described brightness of display screen control module 3, backlight to drive described display screen 4 to open, person easy to use can more clearly see the information such as communication;
(3) when mobile terminal is in communication state, and when the brightness value of described image is less than the minimum value of default brightness degree, 1 transmission of described baseband controller weakens instruction backlight to described brightness of display screen control module 3, to drive described display screen 4 to weaken backlight illumination to low brightness levels, to reduce power consumption;
(4) when mobile terminal is in communication state, and when the brightness value of described image is greater than the maximum of default brightness degree, 1 of described baseband controller sends and strengthens instruction backlight to described brightness of display screen control module 3, to drive described display screen to strengthen backlight illumination to high brightness level, person easy to use can more clearly see the information such as communication.
The view data of taking the photograph by front-facing camera, analyzes the current light value of the judgement image of taking the photograph, and in conjunction with the current state of mobile terminal, display screen backlight is regulated to control.As user's communication while answering position, is closed the backlight of display screen in hand-held automatically; In the time of operating position, automatically open the backlight of display screen; If user is in the operating process of communication, a little less than the light intensity of external environment condition, regulate in real time the brightness of display backlight.By the comparison of the brightness value of current taken the photograph image and the minimum/maximum of described default brightness value or default brightness degree, so that the backlight of display screen controlled.
Shown in Fig. 2 and Fig. 3, the present invention further provides the method that adopts above-mentioned incoming call backlight control system to control, it comprises the following steps:
Step 1) judges the current state of mobile terminal by the state of call module:
If when call module is in running order, go to step 3);
If call module, in the time of non operating state, goes to step 4);
Step 2) automatically gather current image date by described front-facing camera, record the brightness value of current taken the photograph image by analysis, the brightness value of taken the photograph image is compared with default brightness value, obtain brightness comparative result;
Step 3) is in the time of talking state, in brightness comparative result, if the brightness value of described image is less than or equal to described default brightness value, described baseband controller sends and closes instruction backlight to described brightness of display screen control module, backlight to drive described display screen to close;
If the brightness value of described image is greater than described default brightness value, described baseband controller sends and opens instruction backlight to described brightness of display screen control module, backlight to drive described display screen to open;
Step 4) is in the time of non-talking state, in brightness comparative result, if when the brightness value of described image is less than the minimum value of default brightness degree, described baseband controller sends and weakens instruction backlight to described brightness of display screen control module, to drive described display screen to weaken backlight illumination to low brightness levels;
If when the brightness value of described image is greater than the maximum of default brightness degree, described baseband controller sends and strengthens instruction backlight to described brightness of display screen control module, to drive described display screen to strengthen backlight illumination to high brightness level.
Described control method further comprises that step 5) is when call module is during in non operating state, or brightness of display screen control module As-received tape controller sends while cutting out instruction backlight, send the instruction of closing camera to webcam driver by baseband controller, to close camera, stop calling backlight control code.
In a preferred embodiment of the invention, realize in the proximity transducer course of work:
In step 3), when in talking state,
S301) baseband controller calls the backlight control code under call mode;
S302) baseband controller judges whether current mobile terminal has connected earphone or in outer mode playback;
S303) if judge, mobile terminal is in headset mode or outer mode playback, reaches (after as 30 seconds) after the fixed time in call, and baseband controller is closed display backlight lamp;
S304), if baseband controller judges mobile terminal not to be had frames connecting with headphone and use outer putting, judge that mobile terminal, in handset mode, opens front-facing camera by control line;
S305) front-facing camera is beamed back view data to baseband controller by data/address bus;
S306) baseband controller carries out real-time analysis and judgement to the view data obtaining, baseband controller moves the software that contains image real-time analysis and judgement, and this software judges that by the variable quantity of analysis image, surround lighting etc. current phone is in answering position or operating position.Further, when user is during in operating position, people's head or people's ear can not shelter from front-facing camera; When user is in the time answering position, people's head shelters from front-facing camera to a certain extent or fully; When user changes between above-mentioned two kinds of positions, must cause the variation of image and surround lighting etc., thereby judge that current phone is in answering position or operating position;
S307) software judgement thinks that current mobile terminal is in operating position, does not also reach or has left and listened to position, and baseband controller is opened display backlight;
S308) software judgement thinks that current mobile terminal is in listening to position, and baseband controller is now closed display backlight;
S309) baseband controller judges whether current talking finishes, if call is still underway, continues by camera collection image, analyzes contrast, judges position, realizes display backlight control;
S310) if judgement call finishes, baseband controller is closed camera, stops calling correlative code.
In step 4), when in non-talking state, realize the optical sensor course of work:
S401) display backlight is opened, and mobile terminal starts display backlight control program;
S402) backlight control program detects user and whether chooses automatic regulating lightness option;
S403) if do not select automatically to adjust brightness option, display backlight brightness preservation is in user's set point;
S404) if user has chosen automatic adjustment brightness option, mobile terminal enters automatic adjustment luminance patterns, and first baseband controller sends starting command by control line and start front-facing camera;
S405) front-facing camera gathers image and transfers back to baseband controller by data/address bus;
S406) baseband controller carries out real-time analysis and judgement to the view data obtaining, and records the brightness value of current environment light by analysis;
S407) software of brightness of display screen is adjusted in baseband controller operation containing with good grounds current environmental light brightness value, when software judges that current environmental light brightness value is too bright, while needing the suitable brightness that improves display screen, baseband controller control display screen improves backlight illumination to reasonable value; When software judges that current environmental light brightness value is too dark, while needing the suitable brightness that reduces display screen, baseband controller control display screen reduces backlight illumination to reasonable value;
S408) rational backlight brightness values is sent to display screen by baseband controller, adjusts display backlight brightness;
S409) baseband controller judges whether to close the order of display backlight, if do not had, baseband controller continues to compare by camera collection data analysis, controls display backlight brightness;
S410), if system has the instruction of the display backlight of closing, baseband controller is carried out and is closed instruction backlight; Meanwhile, close camera, stop calling relevant backlight control routine.
While realizing proximity transducer function, the present invention sends to baseband controller analysis by the image information that front-facing camera is collected, and baseband controller is judged current state, to control the opening and closing of display backlight lamp.When mobile phone is in receiver call and near in one's ear time, baseband controller judges that current state is for answering position, and the backlight of controlling display screen is closed automatically; When mobile phone is from removing in one's ear, baseband controller judges that current state is operating position, and the backlight of display screen is opened automatically.While realizing optical sensor function, the present invention by by camera collection to image information send to baseband controller analysis, baseband controller is judged current environment brightness power, and then to strengthen or to weaken the brightness of display backlight lamp.
Claims (10)
1. a backlight of mobile terminal control system, for regulating the display backlight of mobile terminal, it comprises baseband controller and the front-facing camera being electrically connected with it respectively and brightness of display screen control module, described brightness of display screen control module is electrically connected with display screen, it is characterized in that: described front-facing camera gathers the view data of mobile terminal under different mode; Described baseband controller, be electrically connected with front-facing camera, for receiving the view data that front-facing camera sends, record the brightness value of current taken the photograph image by analysis, the brightness value of taken the photograph image is compared with the minimum/maximum of default brightness value or default brightness degree, according to the communication state of comparative result and current mobile terminal, send specific control command to described brightness of display screen control module, to drive coupled described display screen to adjust screen backlight.
2. backlight of mobile terminal control system according to claim 1, it is characterized in that: when mobile terminal is in communication state, and when the brightness value of described image is less than or equal to described default brightness value, described baseband controller sends closes instruction backlight to described brightness of display screen control module, backlight to drive described display screen to close.
3. backlight of mobile terminal control system according to claim 1, it is characterized in that: when mobile terminal is in communication state, and when the brightness value of described image is greater than described default brightness value, described baseband controller sends opens instruction backlight to described brightness of display screen control module, backlight to drive described display screen to open.
4. backlight of mobile terminal control system according to claim 1, it is characterized in that: when mobile terminal is in communication state, and when the brightness value of described image is less than the minimum value of default brightness degree, described baseband controller sends and weakens instruction backlight to described brightness of display screen control module, to drive described display screen to weaken backlight illumination to low brightness levels.
5. backlight of mobile terminal control system according to claim 1, it is characterized in that: when mobile terminal is in communication state, and when the brightness value of described image is greater than the maximum of default brightness degree, described baseband controller sends and strengthens instruction backlight to described brightness of display screen control module, to drive described display screen to strengthen backlight illumination to high brightness level.
6. according to the backlight of mobile terminal control system described in any one in claim 2-5, it is characterized in that: described communication state is dialing status or answers state.
7. backlight of mobile terminal control system according to claim 6, is characterized in that: in the time of communication state, the brightness value of described image is 10-30lux.
8. the method that adopts backlight of mobile terminal control system as claimed in claim 1 to control, is characterized in that comprising the following steps:
Step 1) judges the current state of mobile terminal by the state of call module:
If when call module is in running order, go to step 3);
If call module, in the time of non operating state, goes to step 4);
Step 2) automatically gather current image date by described front-facing camera, record the brightness value of current taken the photograph image by analysis, the brightness value of taken the photograph image is compared with default brightness value, obtain brightness comparative result;
Step 3) is in brightness comparative result, if the brightness value of described image is less than or equal to described default brightness value, described baseband controller sends and closes instruction backlight to described brightness of display screen control module, backlight to drive described display screen to close;
If the brightness value of described image is greater than described default brightness value, described baseband controller sends and opens instruction backlight to described brightness of display screen control module, backlight to drive described display screen to open;
Step 4) is in brightness comparative result, if when the brightness value of described image is less than the minimum value of default brightness degree, described baseband controller sends and weakens instruction backlight to described brightness of display screen control module, to drive described display screen to weaken backlight illumination to low brightness levels;
If when the brightness value of described image is greater than the maximum of default brightness degree, described baseband controller sends and strengthens instruction backlight to described brightness of display screen control module, to drive described display screen to strengthen backlight illumination to high brightness level.
9. backlight of mobile terminal control method according to claim 8, it is characterized in that: described control method further comprises that step 5) is when call module is during in non operating state, or brightness of display screen control module As-received tape controller sends while cutting out instruction backlight, send the instruction of closing camera to webcam driver by baseband controller, to close camera, stop calling backlight control code.
10. backlight of mobile terminal control method according to claim 8, is characterized in that: described communication state is dialing status or answers state.
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| CN201210591680.XA CN103916935A (en) | 2012-12-31 | 2012-12-31 | Backlight control system and control method of mobile terminal |
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| CN113837990A (en) * | 2021-06-11 | 2021-12-24 | 荣耀终端有限公司 | Noise monitoring method, electronic equipment, chip system and storage medium |
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