Mobile phone protective cover with frequency-modulated (FM) signal emission module and system thereof

Abstract

The invention relates to a mobile phone protective cover with a frequency-modulated (FM) signal emission module and a system thereof, which relate to the field of mobile phone protective cover technologies and third-party applications and solve the problem of technical deficiencies for connections between mobile phones and vehicle-mounted audios. The mobile phone protective cover mainly comprises a left side frame, a right side frame, an upper side frame and a lower side frame. The mobile phone protective cover is characterized in that: the mobile phone protective cover further comprises the FM signal emission module which is connected with a plug connector and is used for converting voice frequency signals of a mobile phone into FM signals; and the FM signal emission module comprises an FM emission unit and a control unit, wherein the FM emission unit is used for being connected with the audio output end of the mobile phone, converting the voice frequency signals of the mobile phone into the FM signals and transmitting the FM signals to an FM signal receiving device, and the control unit is used for being connected with the control signal output end of the mobile phone and for regulating the frequency of the FM signals of the FM emission unit according to control signals outputted by the mobile phone. A power source is not needed to be individually arranged, thus the volume of the mobile phone protective cover with the FM signal emission module is reduced; the emission frequency of the FM signals is freely controlled by a regulation and control program in the mobile phone, thus the mobile phone protective cover with the FM signal emission module has strong controllability; and connecting wires are not needed, so that the mobile phone protective cover with the FM signal emission module has a simplified structure and is convenient to use.

Description

technical field [0001] The invention relates to the field of mobile phone protective cover technology and third-party mobile phone application programs, in particular to the mobile phone protective cover of iPhone4 series mobile phones and the control thereof. Background technique [0002] At present, the function of the mobile phone protective cover is generally limited to providing a protective function for the mobile phone, preventing the mobile phone shell from being worn, anti-skid, and playing a buffer role in the process of the mobile phone falling, reducing the probability of the mobile phone being broken. [0003] With the development of the mobile phone industry, the existing mobile phones basically have the function of playing music. Because the size of the mobile phone is limited, the power of the speakers in the mobile phone is also limited, and the sound quality is relatively poor. If you want to listen to high-quality music played by the mobile phone For music...

AI Technical Summary

Problems solved by technology

[0003] With the development of the mobile phone industry, the existing mobile phones basically have the function of playing music. Because the size of the mobile phone is limited, the power of the speakers in the mobile phone is also limited, and the sound quality is relatively poor. If you want to listen to high-quality music played by the mobile phone For music, either connect the earphones to the mobile phone and listen through the earphones; or connect the audio output signal of the mobile phone to the home audio or car audio through the audio cable, which is inconvenient to use

Although the Chinese invention patent CN201042021Y is a mobile phone case with FM transmitting function, which realizes the problem of wireless connection between the mobile phone and the car radio, the FM transmitter of the protective case is plugged into the earphone jack of the mobile phone through the earphone plug, and the connecting line The existence of these causes inconvenient use and poor operability, especially in terms of frequency adjustment and control during transmission, and there is also the need to set an independent battery in the protective case to provide power for the FM transmitter

The follow-up improvement of this patent is CN201054622Y mobile phone case with wireless reception and FM function. This patent uses Bluetooth technology to realize the wireless connection between the mobile phone and the FM transmitter in the protective case, although it solves the inconvenience caused by the existence of the above-mentioned connecting wires. Technical problems, but problems with operability and working power supply for FM transmitters still exist

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