CN102035939B - Mobile terminal and LCD (liquid crystal display) control method thereof - Google Patents
Mobile terminal and LCD (liquid crystal display) control method thereof Download PDFInfo
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- CN102035939B CN102035939B CN201010589957.6A CN201010589957A CN102035939B CN 102035939 B CN102035939 B CN 102035939B CN 201010589957 A CN201010589957 A CN 201010589957A CN 102035939 B CN102035939 B CN 102035939B
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- mobile terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0251—Power saving arrangements in terminal devices using monitoring of local events, e.g. events related to user activity
- H04W52/0254—Power saving arrangements in terminal devices using monitoring of local events, e.g. events related to user activity detecting a user operation or a tactile contact or a motion of the device
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
- H04W52/0267—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by controlling user interface components
- H04W52/027—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by controlling user interface components by controlling a display operation or backlight unit
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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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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Human Computer Interaction (AREA)
- Telephone Function (AREA)
Abstract
The invention provides a mobile terminal and an LCD (liquid crystal display) control method thereof. The method comprises the following steps: when detecting that the human body approaches to the mobile phone, a human body detection module of the mobile terminal transfers the detected information to a reference square wave module of the mobile terminal; the reference square wave module transforms the information to a changed frequency, and inputs the information to a frequency detection module of the mobile terminal; when detecting the frequency change reaches the threshold set by the mobile terminal software, the frequency detection module generates an interrupt signal to the CPU of the mobile terminal; and the CPU controls an LCD backlight control module of the mobile terminal through a bus, thereby controlling the LCD. The technical scheme of the invention can be used for accurately controlling the on-off state of the LCD of the mobile terminal on the premise of not destroying the appearance of the mobile terminal.
Description
Technical field
The present invention relates to technical field of mobile terminals, more specifically, relate to the method for mobile terminal and control LCD thereof a kind of.
Background technology
Along with the development of mobile communication, the decline of mobile phone price and telephone expenses, mobile phone has become ordinary consumption electronic product.Yet mobile telephone power consumption is the emphasis that each producer pays close attention at present always, each producer has taked various mobile phone reducing power consumption methods.For present multimedia handset, LCD of mobile phone reducing power consumption is a most important thing.For example the unnecessary energy content of battery of closing hand phone LCD minimizing backlight in time in communication process how, is exactly a good reducing power consumption consideration aspect.At present, for than the mobile phone of higher-end, an infrared emission receiver can be placed on RECEIVER side by producer, when mobile phone is during near skin, the infrared heat source coming out by skin, detects user and receives calls, backlight thereby software control mobile phone cuts out LCD, but infrared receiving module has increased the cost of mobile phone, and health is had to certain harm.
Summary of the invention
A kind of method that the object of the invention is to propose mobile terminal and control LCD, for mobile terminal reduces power consumption.
For achieving the above object, the present invention proposes a kind of method that mobile terminal is controlled LCD, when the human detection module of mobile terminal detects human body proximity mobile phone, this information is passed to the reference square wave module of mobile terminal, reference square wave module by this information through after transforming, the frequency that produces a change inputs to the frequency detection module of mobile terminal, when frequency detection module detects this frequency change and reaches the threshold value that mobile terminal software arranges, produce an interrupt signal to mobile terminal CPU, described CPU is by the LCD backlight control module of total line traffic control mobile terminal, control LCD screen.
Further, whether described human detection module has human body skin to approach near increasing induction line induction receiver by the receiver place at mobile terminal, then the whether close information of human body is passed to described reference square wave generation module and processes.
Further, described reference square wave generation module produces a standard square wave that frequency is fixing, and the information exchange that described human detection module is passed over is crossed to process and is delivered to described frequency detection module.
Further, described frequency detection module is connected by mobile terminal GPIO with described reference square wave generation module, by the sample frequency number of described reference square wave generation module output of mobile phone GPIO mouth, again by calculating the difference of the frequency number of each sampling and the fixed frequency of reference square wave generation module, and according to the frequency-splitting threshold value of software set, report a frequency detecting result to mobile terminal CPU, mobile terminal CPU carries out different requirements according to result again.
Further, described LCD backlight control module is controlled LCD, and the testing result that mobile terminal CPU reports according to frequency detection module gives the output of LCD backlight control module a command signal, and LCD backlight control module is controlled LCD screen according to command signal; Described LCD backlight control module comprises and closes LCD screen or open LCD screen according to command signal control LCD screen.
In addition, the present invention also proposes the mobile terminal of a kind of LCD of control, and described mobile terminal comprises:
Human detection module, while human body proximity mobile phone being detected, passes to this information the reference square wave module of mobile terminal;
Reference square wave module, by above-mentioned information, after transforming, the frequency that produces a change inputs to the frequency detection module of mobile terminal;
Frequency detection module, detects said frequencies and changes while reaching the threshold value that mobile terminal software arranges, and produces an interrupt signal to mobile terminal CPU;
LCD backlight control module, described CPU, by the LCD backlight control module of total line traffic control mobile terminal, controls LCD screen.
Further, whether described human detection module has human body skin to approach near increasing induction line induction receiver by the receiver place at mobile terminal, then the whether close information of human body is passed to described reference square wave generation module and processes.
Further, described reference square wave generation module produces a standard square wave that frequency is fixing, and the information exchange that described human detection module is passed over is crossed to process and is delivered to described frequency detection module.
Further, described frequency detection module is connected by mobile terminal GPIO with described reference square wave generation module, by the sample frequency number of described reference square wave generation module output of mobile phone GPIO mouth, again by calculating the difference of the frequency number of each sampling and the fixed frequency of reference square wave generation module, and according to the frequency-splitting threshold value of software set, report a frequency detecting result to mobile terminal CPU, mobile terminal CPU carries out different requirements according to result again.
Further, described LCD backlight control module is controlled LCD, and the testing result that mobile terminal CPU reports according to frequency detection module gives the output of LCD backlight control module a command signal, and LCD backlight control module is controlled LCD screen according to command signal; Described LCD backlight control module comprises and closes LCD screen or open LCD screen according to command signal control LCD screen.
Beneficial effect of the present invention: compared with prior art, traditional infrared detection module, when handset structure designs, perforate in the structure of needs consideration position directly over the mainboard of installation infrared module, affect mobile phone attractive in appearance, and the technical program can realize and realize human detection in the situation that keeping cell phone appearance constant; Infrared detection is that the infrared heat source distributing by human body self detects, as long as detecting, mobile phone have infrared heat source to exist around, will produce response, can exist like this mobile phone to connect moment user and also not see that caller identification is backlight with regard to closing immediately LCD, affecting user experiences, the technical program is that by the spacing between human body and hard contact, to control LCD backlight, can realize accurate distance control by software setting, and user experiences better.
Accompanying drawing explanation
Fig. 1 be the invention process mobile terminal mobile phone structural representation;
Fig. 2 is the hardware elementary diagram of embodiment of the present invention LCD of mobile phone power-saving circuit backlight;
Fig. 3 is the data transmission scheme between embodiment of the present invention mobile phone reference square wave generation module and mobile phone GPIO1;
Fig. 4 is the holistic approach realization flow schematic diagram that embodiment of the present invention mobile phone is controlled LCD.
Embodiment
Below in conjunction with the drawings and specific embodiments, technical solution of the present invention is described in detail.In following examples, described mobile terminal be take mobile phone and is described as example.
Please refer to shown in Fig. 1, Fig. 1 is the mobile module schematic diagram that the embodiment of the present invention is controlled LCD, and it comprises: human detection module, reference square wave generation module, frequency detection module, LCD backlight control module, mobile phone CPU.
Whether human detection module has human body skin to approach by increase induction line induction receiver at mobile phone receiver place near, then whether human body is passed to reference square wave generation module near this information and processes.
Reference square wave generation module, it is connected with described human detection module; Its effect is to produce a standard square wave that frequency is fixing, and the information exchange that human detection module can be passed over crosses to process and be delivered to frequency detection module, for its detection.
Frequency detection module, it is connected by mobile phone GPIO with reference square wave generation module.
Frequency detection module, mainly by the frequency number of mobile phone GPIO mouth sampling reference square wave generation module output, again by calculating the difference of the frequency number of each sampling and the fixed frequency of reference square wave generation module, and according to the frequency-splitting threshold value of software set, report a frequency detecting result to mobile phone CPU, mobile phone CPU carries out different requirements according to result again.
LCD backlight control module, is mainly used to control LCD brightness.The testing result that mobile phone CPU reports according to frequency detection module, gives the output of LCD backlight control module a command signal, and LCD backlight control module changes the brightness of LCD screen according to command signal.
When human detection module detects human body proximity mobile phone, this change information is passed to reference square wave module below, reference square wave module by this information through after transforming, the frequency that produces a change inputs to frequency detection module, when frequency detection module detects this variation and reaches the threshold value that cell phone software arranges, produce an interrupt signal to mobile phone CPU, mobile phone CPU removes to control LCD backlight control module by bus again, regulates the brightness of LCD screen.
Fig. 2 is that the hardware of LCD of mobile phone power-saving circuit backlight is realized part, its specific implementation process is when Cell Phone Design, by install a biscuit metal conductor near receiver, this conductor is connected with the LC resonant circuit of the reference square wave generation module of rear end, when having human body near this metallic conductor, at this moment between metallic conductor and human body, can form an equivalent capacity, as the capacitor C 1 in Fig. 2, the capacitance of this equivalent capacity size can change along with the distance distance between human body and metallic conductor.When human body and conductor spacing diminish, it is large that equivalent capacity becomes, otherwise diminish.And in this equivalence capacitor C 1 and Fig. 2 after inverter input LC parallel resonance (formula after parallel resonance is L* (C+C1)), produce one than the larger frequency of fixed L C resonance, this frequency is again after inverter shaping, form a square wave, then input to mobile phone GPIO1 by inverter output.Software is by the detection of handset GPIO1 pin total number of pulse of square wave rising edge and trailing edge within a certain period of time, the more total number of pulse producing with fixed L C resonance compares, and judges whether mobile phone approaches human body.
Please refer to shown in Fig. 3, Fig. 3 is the data transmission scheme between Fig. 2 hardware inverter output and mobile phone GPIO, and total number on the upper and lower edge of square wave of sampling in certain time interval can clearly be found out the size of frequency change when having people and nobody to approach.
Fig. 4 is the holistic approach realization flow figure that embodiment of the present invention mobile phone is controlled LCD, and it comprises the following steps:
S401: mobile phone initialization, in open state;
S402: judge that mobile phone, whether in calling out or talking state, if it is proceeds to step S403, if not proceeding to step S412;
The present invention program's setting be only at mobile phone in calling out or during talking state, just allow this power-saving circuit work backlight.At other state, mobile phone is forbidden this power-saving circuit work backlight.
S403: when mobile phone is in calling out or during talking state, cell phone software is opened the power supply of power-saving circuit backlight, power-saving circuit is started working;
S404: reference square wave generation module starts to work on power, produces the square wave of a fixed frequency, and to mobile phone CPU, inputs square-wave signal by the mobile phone GPIO1 pin being attached thereto;
S405: whether human detection module detection of handset is near human body skin;
Here it may be noted that time, the frequency producing after this reference square wave generation module self work is a fixed value, this is fixing when hardware designs.Only have when human detection module detects mobile phone near human body skin, while then this result of variations being passed to reference square wave generation module, reference square wave generation module just can change the output frequency of self.
S406: embedded in mobile phone software detection module, detects rising edge and the total number of trailing edge pulse at certain intervals square-wave signal of GPIO1 pin input in the time, and with a variable, the total number of pulse is kept in the internal memory of mobile phone temporarily;
S407: the fixed frequency value that reads the reference square wave module of this power-saving circuit backlight from mobile phone EMS memory;
Mobile phone reads the fixed frequency value of the reference square wave module of this power-saving circuit backlight, and this value writes some fixedly places of mobile phone FLASH in advance by software, only has when this power-saving circuit backlight is opened, and software could be read this value by reading FLASH.
S408: the frequency number detecting in the frequency number reading in step S407 and step S406 is done to difference comparison according to predefined algorithm, and export frequency difference value;
The frequency values that 407 steps and 406 steps are read is done a difference comparison according to the predefined algorithm of software, and this value is saved by temporary variable, exports to 409 steps.
S409: according to predefined threshold value, judge whether mobile phone frequency difference value reaches requirement; If reached, proceed to step S410, if do not reached, proceed to step S411;
According to the Output rusults of step S408, the result of 408 outputs and the threshold value having set are contrasted, then select execution step S410 or step S411 according to obtaining different comparative results.
In order to prevent mobile phone false triggering, when cell phone software arranges threshold value, need to select a rational threshold value.For this reason, when this concrete case study on implementation design, change the spacing between human body skin and the induction metallic conductor of headphone, make its spacing meet human body in normal spacing between ear and receiver while using mobile phone, while being 1cm as setting space, the square wave frequency pulse number of GPIO1 pin input in resolution chart 2, be designated as f1, again this value is deducted to the square wave frequency number that while there is no human body near the induction metal at earpiece place, GPIO1 pin records, be designated as f2, f1 and f2 difference are made as to threshold value.Like this, when the induction metal at earpiece place and the spacing of people's ear are greater than 1cm, software thinks mobile phone in talking state but not near ear, LCD is backlight to be opened.
S410: control LCD backlight circuit, close lcd screen;
If when 409 results that compare meet LCD requiring of closing backlight, now carry out 410 steps, mobile phone CPU, by sending control command to LCD backlight chip, closes LCD screen.
S411: control LCD backlight circuit, open lcd screen;
S412: mobile phone cuts out power-saving circuit backlight, forbids this circuit working.
When mobile phone is during in non-call or call state, mobile phone cuts out the power supply of this power-saving circuit backlight and supplies with, thereby has controlled the work of power-saving circuit backlight.In this step, the power supply of this power-saving circuit backlight can be from the additional power source chip power supply outside cell phone platform, the power supply that also can provide from cell phone platform self, but have a common feature, be exactly that this power supply can be closed at any time or be opened by software.Power supply shown in Fig. 2 is to power to this power-saving circuit backlight by the power supply chip of an additional charged enable pin, and cell phone software exports by GPIO2 the opening and closing that a low and high level is controlled this power supply.
Certainly; the present invention also can have numerous embodiments; in the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art are when making according to the present invention various corresponding changes or variation; in every case any modification of doing within the spirit and principles in the present invention, be equal to replacements, improvement, within protection scope of the present invention all should be included in.
Claims (6)
1. a mobile terminal is controlled the method for LCD, it is characterized in that, when the human detection module of mobile terminal detects human body proximity mobile phone, this information is passed to the reference square wave generation module of mobile terminal, reference square wave generation module by this information through after transforming, the frequency that produces a change inputs to the frequency detection module of mobile terminal, when frequency detection module detects this frequency change and reaches the threshold value that mobile terminal software arranges, produce an interrupt signal to mobile terminal CPU, described CPU is by the LCD backlight control module of total line traffic control mobile terminal, control LCD screen,
Whether described human detection module has human body skin to approach near increasing induction line induction receiver by the receiver receiver place at mobile terminal, then the whether close information of human body being passed to described reference square wave generation module processes, described induction line comprises metallic conductor, described metallic conductor is in parallel with the LC resonant circuit of described reference square wave generation module, when having human body near this metallic conductor, between described metallic conductor and human body, can form an equivalent capacity, the capacitance size of described equivalent capacity can change along with the spacing distance between human body and described metallic conductor,
Described frequency detection module is connected by mobile terminal universal input output GPIO with described reference square wave generation module, by the sample frequency number of described reference square wave generation module output of mobile phone GPIO mouth, again by calculating the difference of the frequency number of each sampling and the fixed frequency of reference square wave generation module, and according to the frequency-splitting threshold value of software set, report a frequency detecting result to mobile terminal CPU, mobile terminal CPU carries out different requirements according to result again.
2. the method for claim 1, is characterized in that, described reference square wave generation module produces a standard square wave that frequency is fixing, and the information exchange that described human detection module is passed over is crossed to process and is delivered to described frequency detection module.
3. the method for claim 1, it is characterized in that, described LCD backlight control module is controlled LCD, the testing result that mobile terminal CPU reports according to frequency detection module, give the output of LCD backlight control module a command signal, LCD backlight control module is controlled LCD screen according to command signal; Described LCD backlight control module comprises and closes LCD screen or open LCD screen according to command signal control LCD screen.
4. can control a mobile terminal of LCD, it is characterized in that, described mobile terminal comprises:
Human detection module, while human body proximity mobile phone being detected, passes to this information the reference square wave generation module of mobile terminal;
Reference square wave generation module, by above-mentioned information, after transforming, the frequency that produces a change inputs to the frequency detection module of mobile terminal, and described reference square wave generation module comprises LC resonant circuit;
Frequency detection module, detects said frequencies and changes while reaching the threshold value that mobile terminal software arranges, and produces an interrupt signal to mobile terminal CPU;
LCD backlight control module, described CPU, by the LCD backlight control module of total line traffic control mobile terminal, controls LCD screen;
Whether described human detection module has human body skin to approach near increasing induction line induction receiver by the receiver receiver place at mobile terminal, then the whether close information of human body being passed to described reference square wave generation module processes, described induction line comprises metallic conductor, described metallic conductor is in parallel with the LC resonant circuit of described reference square wave generation module, when having human body near this metallic conductor, between described metallic conductor and human body, can form an equivalent capacity, the capacitance size of described equivalent capacity can change along with the spacing distance between human body and described metallic conductor,
Described frequency detection module is connected by mobile terminal universal input output GPIO with described reference square wave generation module, by the sample frequency number of described reference square wave generation module output of mobile phone GPIO mouth, again by calculating the difference of the frequency number of each sampling and the fixed frequency of reference square wave generation module, and according to the frequency-splitting threshold value of software set, report a frequency detecting result to mobile terminal CPU, mobile terminal CPU carries out different requirements according to result again.
5. mobile terminal as claimed in claim 4, is characterized in that, described reference square wave generation module produces a standard square wave that frequency is fixing, and the information exchange that described human detection module is passed over is crossed to process and is delivered to described frequency detection module.
6. mobile terminal as claimed in claim 4, it is characterized in that, described LCD backlight control module is controlled LCD, the testing result that mobile terminal CPU reports according to frequency detection module, give the output of LCD backlight control module a command signal, LCD backlight control module is controlled LCD screen according to command signal; Described LCD backlight control module comprises and closes LCD screen or open LCD screen according to command signal control LCD screen.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010589957.6A CN102035939B (en) | 2010-12-15 | 2010-12-15 | Mobile terminal and LCD (liquid crystal display) control method thereof |
| PCT/CN2011/080187 WO2012079404A1 (en) | 2010-12-15 | 2011-09-26 | Mobile terminal and lcd control method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201010589957.6A CN102035939B (en) | 2010-12-15 | 2010-12-15 | Mobile terminal and LCD (liquid crystal display) control method thereof |
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| Publication Number | Publication Date |
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| CN102035939A CN102035939A (en) | 2011-04-27 |
| CN102035939B true CN102035939B (en) | 2014-08-13 |
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| WO (1) | WO2012079404A1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035939B (en) * | 2010-12-15 | 2014-08-13 | 中兴通讯股份有限公司 | Mobile terminal and LCD (liquid crystal display) control method thereof |
| EP2696605A1 (en) * | 2012-08-09 | 2014-02-12 | Ntt Docomo, Inc. | Apparatus and method for energy efficient location sensing |
| CN104122974B (en) * | 2013-04-24 | 2017-07-18 | 华硕电脑股份有限公司 | Mobile communications device with identification bodily fuctions |
| CN103605504A (en) * | 2013-09-29 | 2014-02-26 | 深圳酷派技术有限公司 | Terminal and operating method thereof |
| CN103984028A (en) * | 2014-05-26 | 2014-08-13 | 中国联合网络通信集团有限公司 | Detection device and mobile terminal |
| CN106200989B (en) * | 2016-09-08 | 2019-11-12 | 广东小天才科技有限公司 | Method and device for lightening screen of mobile terminal |
| CN108076210A (en) * | 2016-11-11 | 2018-05-25 | 中兴通讯股份有限公司 | The screen backlight control system and method for smart machine |
| CN106848611B (en) * | 2017-02-21 | 2020-03-06 | 青岛海信移动通信技术股份有限公司 | Metal triggering device for mobile terminal and mobile terminal |
| CN112688739B (en) * | 2020-12-16 | 2022-08-09 | 武汉永鼎光通科技有限公司 | APC control circuit that self-adaptation is shaded |
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| JP5045565B2 (en) * | 2008-06-12 | 2012-10-10 | 富士通株式会社 | Mobile device |
| CN102035939B (en) * | 2010-12-15 | 2014-08-13 | 中兴通讯股份有限公司 | Mobile terminal and LCD (liquid crystal display) control method thereof |
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- 2010-12-15 CN CN201010589957.6A patent/CN102035939B/en active Active
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| CN102035939A (en) | 2011-04-27 |
| WO2012079404A1 (en) | 2012-06-21 |
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