CN102263861A - Mobile phone and automatic regulation method for mobile phone radiation - Google Patents
Mobile phone and automatic regulation method for mobile phone radiation Download PDFInfo
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- CN102263861A CN102263861A CN2011102473561A CN201110247356A CN102263861A CN 102263861 A CN102263861 A CN 102263861A CN 2011102473561 A CN2011102473561 A CN 2011102473561A CN 201110247356 A CN201110247356 A CN 201110247356A CN 102263861 A CN102263861 A CN 102263861A
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Abstract
The invention discloses a mobile phone and an automatic regulation method for mobile phone radiation. The mobile phone comprises a radio frequency chip, a baseband chip, a close-range sensor and a power amplifier, wherein the radio frequency chip is used for generating a radio frequency signal; the baseband chip is connected with the radio frequency chip to control the radio frequency chip to generate the radio frequency signal; the close-range sensor is connected with the baseband chip and is started when detecting that a face approaches to the close-range sensor; the power amplifier is connected with the baseband chip and the radio frequency chip; the baseband chip controls the power amplifier to regulate the emission power of the radio frequency signal into a first emission power according to the first radio frequency parameter when the close-range sensor is not started; and when the close-range sensor is started, the baseband chip controls the power amplifier to regulate the emission power of the radio frequency signal into a second emission power according to the second radio frequency parameter. According to the above mode, the emission power regulated by the power amplifier, of the radio frequency signal can be automatically lowered when a user approaches to the mobile phone to converse so as to lower radiation.
Description
Technical field
The present invention relates to field of mobile communication, particularly relate to the automatic adjusting method of a kind of mobile phone and mobile phone radiation.
Background technology
Along with mobile communication technology is more and more flourishing, mobile phone has become the necessity in people's life.People use the frequency of mobile phone more and more higher, use the time of mobile phone also more and more longer.As everyone knows, mobile phone has radiation to human body, and along with the frequency of using mobile phone is high more, the time is long more, and mobile phone is also more and more to the radiation of human body.
SAR (Specific Absorption Rate) is the abbreviation of electro-magnetic wave absorption ratio or specific absorption rate, and the SAR value is that the electromagnetic wave energy of mobile phone or wireless product absorbs ratio.Generally, a kind of quantification that the radiation meeting of SAR value representation mobile phone impacts human body, the SAR value is big more, represent big more to the influence of human body, otherwise, then influence less.Therefore, want to reduce mobile phone radiation, will reduce the SAR value.Generally speaking, the SAR value all is correlated with the layout of size, each internal components of mobile phone and the antenna of mobile phone.But after the structure of a mobile phone was determined, the SAR value was just often directly relevant with antenna maximum radiated power TRP (toral radiated power, total radiant power).TRP is low more, and SAR is just low more.The TRP value of mobile phone often has more directly relation with the maximum transmission power of power amplifier.Maximum transmission power is big more, and TRP is big more, otherwise maximum transmit power value diminishes, and that TRP also can follow step-down.Therefore can draw, the radiation size of mobile phone is subjected to the influence of the maximum transmission power of power amplifier, and the maximum transmission power of power amplifier is big more, and the radiation of mobile phone is just big more.
Current, the government regulation of US and European has clear and definite regulation for the SAR value, and the U.S. is 1.6W/kg (1 gram), and Europe is 2.0W/kg (10 gram).And TRP does not also have international standard, and just each mobile operator has requirement separately.So a lot of mobile phones can cause the SAR value higher in order to meet the requirements of TRP, that is to say, though the SAR value can be up to specification, but still have bigger radiation.
In general, the user is bigger in the radiation that is subjected to when the mobile phone communication, thereby and can not turn down the SAR value reduction radiation of mobile phone in the existing mobile phone the user during near mobile phone.
Summary of the invention
The technical problem that the present invention mainly solves provides the automatic adjusting method of a kind of mobile phone and mobile phone radiation, can reduce the transmitting power of the radiofrequency signal that power amplifier adjusts the user when the mobile phone communication automatically, thereby solve in the existing mobile phone problem that can not turn down the SAR value reduction radiation of mobile phone the user during near mobile phone communication.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of mobile phone is provided, comprises radio frequency chip, baseband chip, closely inductor and power amplifier.Radio frequency chip produces radiofrequency signal.Baseband chip is connected with this radio frequency chip, and controls this radio frequency chip and produce this radiofrequency signal.Closely inductor is connected with this baseband chip, and detect people's face near the time start.Power amplifier is connected with this radio frequency chip and this baseband chip.Wherein, when this when closely inductor does not start, this baseband chip is controlled this power amplifier and according to first radio frequency parameter transmitting power of this radiofrequency signal is adjusted into first transmitting power.When this when closely inductor starts, this baseband chip is controlled this power amplifier and according to second radio frequency parameter transmitting power of this radiofrequency signal is adjusted into second transmitting power.This first transmitting power is greater than this second transmitting power.
Wherein, this mobile phone further comprises antenna, and this antenna connects this power amplifier and launches this radiofrequency signal of adjusting through this power amplifier.
Wherein, comprise the dac value of this power amplifier in this first radio frequency parameter and this second radio frequency parameter respectively, wherein, the dac value in this first radio frequency parameter is greater than the dac value in this second radio frequency parameter.
Wherein, this first radio frequency parameter is stored in first file, and this second radio frequency parameter is stored in second file.
Wherein, this mobile phone further comprises internal memory, and this internal memory is connected with this baseband chip, and this first file and this second file storage and are called from this internal memory by this baseband chip in this internal memory.
For solving the problems of the technologies described above, another technical solution used in the present invention is: a kind of automatic adjusting method of mobile phone radiation is provided, and this automatic adjusting method comprises step: judged whether that people's face is close.If judge that unmanned face is close, then mobile phone is adjusted into first transmitting power according to first radio frequency parameter with the transmitting power of radiofrequency signal.If judging has people's face close, then this mobile phone is adjusted into second transmitting power according to second radio frequency parameter with the transmitting power of this radiofrequency signal, and this first transmitting power is greater than this second transmitting power.
Wherein, in judging whether the close step of people's face, whether start by inductor closely and to have judged whether that people's face is close, this closely inductor detect people's face near the time start.
Wherein, comprise the dac value of power amplifier in this first radio frequency parameter and this second radio frequency parameter respectively, wherein, the dac value in this first radio frequency parameter is greater than the dac value in this second radio frequency parameter.
Wherein, this first radio frequency parameter is stored in first file, and this second radio frequency parameter is stored in second file.
Wherein, this first file and this second file storage are in internal memory.
The invention has the beneficial effects as follows: the situation that is different from prior art, the automatic adjusting method of mobile phone of the present invention and mobile phone radiation, can reduce the transmitting power of the radiofrequency signal that power amplifier adjusts the user when the mobile phone communication automatically, thereby turn down the SAR value reduction radiation of mobile phone during near mobile phone communication automatically the user.
Description of drawings
Fig. 1 is the schematic block diagram of a preferred embodiment of mobile phone of the present invention;
Fig. 2 is the flow chart of a preferred embodiment of the automatic adjusting method of mobile phone radiation of the present invention.
Embodiment
Consult Fig. 1, Fig. 1 is the schematic block diagram of a preferred embodiment of mobile phone of the present invention.In the present embodiment, mobile phone comprises baseband chip 11, radio frequency chip 12, power amplifier 13, antenna 14, closely inductor 15 and internal memory 16.
Closely inductor 15 is connected with baseband chip 11, and detect people's face near the time start.In the present embodiment, inductor (proximity detector) the 15th closely, a kind of infrared inductor can have the object of temperature to respond to people's face and so on.It can not start always, only detected object near the time just can start, and when object leaves, enter resting state.
When closely inductor 15 did not start, baseband chip 11 control power amplifiers 13 were adjusted into first transmitting power according to first radio frequency parameter with the transmitting power of radiofrequency signal.When inductor closely 15 started, baseband chip 11 control power amplifiers 13 were adjusted into second transmitting power according to second radio frequency parameter with the transmitting power of radiofrequency signal.And first transmitting power is greater than second transmitting power.
In the development process of mobile phone, do not consider earlier the SAR index, press what a mobile phone of normal procedure design debug, at this moment mobile phone just has one group of TRP value, one group of radio frequency parameter is (comprising the DAC value of power amplifier, be dac value, the maximum transmission power of the corresponding power amplifier of data that the DAC value is maximum) and one group of SAR value.Giving an example, as following table, is the low-frequency data of a GSM mobile handset.
As seen, its SAR value reaches code requirement, but higher.This group radio frequency parameter is first radio frequency parameter.Each cell phone platform all can have debugging acid, can derive radio frequency parameter and be saved as a file.In the present embodiment, the first above-mentioned radio frequency parameter is derived be saved as first file.
Then, use debugging acid, revise the maximum DAC value of power amplifier, maximum transmission power can change so, the then also corresponding change of mobile phone TRP value and SAR value.For example, make maximum DAC value into 540 by 550, maximum transmission power may become 32dBm so, and TRP may become 28.2dBm, and the SAR value may become 1.2W/kg (1 gram).Can repeat to revise DAC value this moment, up to TRP value and SAR value individual relative all values preferably arranged.Certainly can not pursue low SAR value simply and cause the TRP value low excessively, answer performance because the low excessively meeting of TRP value influence mobile phone.
For example, preferred, maximum transmission power may be 31.2dBm, and TRP may be 27.5dBm, and the SAR value may be 1.0W/kg (1 gram).This group radio frequency parameter is second radio frequency parameter.Similarly, utilize debugging acid, second radio frequency parameter is derived be saved as second file.In order to reach the effect that reduces radiation, the dac value in first radio frequency parameter is greater than the dac value in second radio frequency parameter.
Now a lot of touch-screen mobile phones all have the device of near field induction, are used to respond to people's ear and answer also screen locking, and preventing has misoperation to touch-screen when receiving calls.The present invention has proposed a kind of mobile phone according to the near field sensing device that this mobile phone carries, and can allow mobile phone under the close situation of mobile phone communication of user, can reduce the SAR value automatically, thereby reduce the radiation of mobile phone to the user.
Consult Fig. 2, Fig. 2 is the flow chart of a preferred embodiment of the automatic adjusting method of mobile phone radiation of the present invention.The automatic adjusting method of the mobile phone radiation of present embodiment comprises:
In step S01, judged whether that people's face is close.In this step, whether start by inductor closely and to have judged whether that people's face is close, closely inductor detect people's face near the time start.If nobody's face is close, then enter step S02; If someone face is close, then enter step S03.
In step S02, the transmitting power of radiofrequency signal is adjusted into first transmitting power according to first radio frequency parameter.
In step S03, the transmitting power of radiofrequency signal is adjusted into second transmitting power according to second radio frequency parameter.And first transmitting power is greater than second transmitting power.
Same, first radio frequency parameter and second radio frequency parameter can obtain by above-described mode, and comprise the dac value of power amplifier respectively.Wherein, the dac value in first radio frequency parameter is greater than the dac value in second radio frequency parameter, thereby makes first transmitting power greater than second transmitting power.First radio frequency parameter is stored in first file, and second radio frequency parameter is stored in second file, and first file and second file storage are in the internal memory of mobile phone.
Be different from prior art, the automatic adjusting method of mobile phone of the present invention and mobile phone radiation, can choose ear when conversation reduce the transmitting power of the radiofrequency signal that power amplifier adjusts automatically the user, thereby make mobile phone turn down the SAR value reduction radiation of mobile phone during near mobile phone communication automatically the user.
The above only is embodiments of the invention; be not so limit claim of the present invention; every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to be done; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (10)
1. a mobile phone is characterized in that, comprising:
Radio frequency chip produces radiofrequency signal;
Baseband chip is connected with described radio frequency chip, and controls described radio frequency chip and produce described radiofrequency signal;
Closely inductor is connected with described baseband chip, and detect people's face near the time start;
Power amplifier is connected with described radio frequency chip and described baseband chip;
Wherein, when described closely when inductor does not start, described baseband chip is controlled described power amplifier and according to first radio frequency parameter transmitting power of described radiofrequency signal is adjusted into first transmitting power, when described closely inductor starts, described baseband chip is controlled described power amplifier and according to second radio frequency parameter transmitting power of described radiofrequency signal is adjusted into second transmitting power, and described first transmitting power is greater than described second transmitting power.
2. mobile phone according to claim 1 is characterized in that described mobile phone further comprises antenna, and described antenna connects described power amplifier and launches the described radiofrequency signal of adjusting through described power amplifier.
3. mobile phone according to claim 1, it is characterized in that, the dac value that comprises described power amplifier in described first radio frequency parameter and described second radio frequency parameter respectively, wherein, the dac value in described first radio frequency parameter is greater than the dac value in described second radio frequency parameter.
4. mobile phone according to claim 1 is characterized in that, described first radio frequency parameter is stored in first file, and described second radio frequency parameter is stored in second file.
5. mobile phone according to claim 4, it is characterized in that described mobile phone further comprises internal memory, described internal memory is connected with described baseband chip, described first file and described second file storage and are called from described internal memory by described baseband chip in described internal memory.
6. the automatic adjusting method of a mobile phone radiation is characterized in that, described automatic adjusting method comprises:
Judged whether that people's face is close;
If judge that unmanned face is close, then the transmitting power of radiofrequency signal is adjusted into first transmitting power according to first radio frequency parameter, if judging has people's face close, then according to second radio frequency parameter transmitting power of described radiofrequency signal is adjusted into second transmitting power, described first transmitting power is greater than described second transmitting power.
7. automatic adjusting method according to claim 6 is characterized in that, in judging whether the close step of people's face, whether start by inductor closely and to have judged whether that people's face is close, described closely inductor detect people's face near the time start.
8. automatic adjusting method according to claim 6, it is characterized in that, the dac value that comprises power amplifier in described first radio frequency parameter and described second radio frequency parameter respectively, wherein, the dac value in described first radio frequency parameter is greater than the dac value in described second radio frequency parameter.
9. automatic adjusting method according to claim 6 is characterized in that, described first radio frequency parameter is stored in first file, and described second radio frequency parameter is stored in second file.
10. automatic adjusting method according to claim 9 is characterized in that, described first file and described second file storage are in internal memory.
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Application publication date: 20111130 |