WO2014194533A1 - Mobile phone protective case capable of wireless audio transmission and system thereof - Google Patents

Abstract

A mobile phone protective case capable of wireless audio transmission and a system thereof solve the problems as to the connection mode between a mobile phone and a vehicular audio system. The mobile phone protective case comprises a protective case body (1), and a plug connector (2) in cooperative plug-connection with a mobile phone data cable interface is arranged on the protective case body (1); the mobile phone protective case is characterized in that: the protective case body (1) is encapsulated with a micro processor control unit and a frequency-modulated signal transmitting unit; the micro processor control unit is used for audio-decoding a digital signal output from the mobile phone data cable interface, providing the frequency-modulated signal transmitting unit with audio signal input, and regulating and controlling the frequency-modulated signal transmitting unit according to a control signal output from the mobile phone data cable interface. A corresponding regulation and control program is installed in the mobile phone, and the transmitting frequency of the frequency-modulated signal is controlled by the regulation and control program in the mobile phone in a free way, with the controllability being strong.

Description

 Mobile phone case with wireless audio transmission and system thereof

Technical field

The invention relates to a mobile phone protective cover technology and a mobile phone third party application field, in particular to a mobile phone protective cover for the iPhone 5 series mobile phone and a control aspect thereof.

Background technique

At present, the role of the mobile phone case is generally limited to provide a protection function for the mobile phone, to avoid wear and tear of the mobile phone case, and to play a buffering role in the process of dropping the mobile phone, thereby reducing the probability of the mobile phone falling.

With the development of the mobile phone industry, the existing mobile phones basically have music playing functions. Because the size of the mobile phone is limited, the power of the speakers in the mobile phone is limited, and the sound quality is relatively poor. If you want to listen to the high quality of the mobile phone. Music, either connected to the headset on the phone, listening through the headset; or through the audio cable to connect the audio output signal of the phone to the home audio or car audio, it is inconvenient to use. Although the Chinese invention patent CN201042021Y is a mobile phone case with FM transmission function, the wireless connection between the mobile phone and the car radio is realized, but the FM transmitter of the protective cover is plugged into the earphone jack of the mobile phone through the earphone plug, and the connection line The existence of the invention leads to inconvenient use and poor operability, especially in the regulation control of the frequency at the time of transmission, and the need to provide a separate battery in the protective sleeve to supply power to the FM transmitter. The patent for subsequent improvement of the patent CN201054622Y is a mobile phone case with wireless receiving and frequency modulation function. The patent uses Bluetooth technology to realize wireless connection between the mobile phone and the FM transmitter in the protective cover, although the use of the above existing connecting line is inconvenient to use. Technical issues, but operability and operating power supply problems for FM transmitters still exist.

Summary of the invention

In summary, the main purpose of the present invention is to solve the problem of the connection between the mobile phone and the car audio, and to provide a mobile phone case with wireless audio transmission and a system thereof.

In order to solve the technical problem proposed by the present invention, the technical solution adopted is:

A mobile phone protective cover with wireless audio transmission, comprising a protective cover body, wherein the protective cover body is provided with a plug connector that is inserted into the interface of the mobile phone data line, and the feature is that the protective cover body is packaged with a microprocessor control unit connected to the plug connector, and a frequency modulation signal transmitting unit connected to the microprocessor control unit;

The microprocessor control unit is configured to perform audio decoding on the digital signal outputted by the data line interface of the mobile phone, provide audio signal input for the FM signal transmitting unit, and adjust and control the FM signal transmitting unit according to the control signal output by the mobile phone data line interface;

The FM signal transmitting unit is configured to convert the audio signal output by the microprocessor control unit into a frequency modulated signal and wirelessly transmit the signal to the FM signal receiving device.

The protective cover body is provided with a Micro USB interface connected to the plug connector.

The microprocessor control unit includes an MCU chip of the type D4110A and a watchdog circuit connected to the MCU chip.

The FM signal transmitting unit adopts an FM transceiver chip of the model QN8007.

The plug connector is a Lightning plug connector.

The bottom edge of the protective cover body is provided with an openable aperture cover at a position corresponding to the earphone interface of the mobile phone.

The FM transmission system including the mobile phone case includes the mobile phone protection cover and a mobile phone disposed in the mobile phone protection cover; the bottom end of the mobile phone is provided with a data line interface, and the music player is installed in the mobile phone The plug connector of the mobile phone protective cover is inserted into the data line interface of the mobile phone, and the feature is that: the mobile phone is further equipped with a control program for controlling the working state of the FM signal transmitting module in the mobile phone protective cover; The described control procedures include:

An FM adjusting unit is configured to generate an adjustment operation code according to a user's adjustment operation, and send the frequency modulation signal transmission module to the mobile phone protection sleeve through the data line interface to provide a frequency adjustment control signal, thereby implementing the FM signal transmission module. Adjustment operation of the transmission frequency;

a music playing control unit is used for starting the music player in the mobile phone, and transmitting the audio signal played by the music player to the FM signal transmitting module of the mobile phone protective cover through the data line interface, and the tuning signal transmitting module is used to tune the wave The mode is transmitted to the FM signal receiving device;

A switch control unit is configured to control whether the audio signal of the mobile phone needs to be transmitted to the FM signal transmitting module through the data line interface.

The control program includes:

A storage unit for recording and storing the commonly used frequency values of the FM adjustment unit for quick recall by the user.

The control program includes:

A state detecting unit is configured to detect whether the data line interface of the FM signal transmitting module and the mobile phone is in a connected state; when detecting the non-connected state, prompting the user to insert it.

The invention has the beneficial effects that the invention is mainly for the iPhone 5 series mobile phone, and is used in combination, and the corresponding control program is installed in the mobile phone, and the FM signal transmitting module is plugged into the data line interface of the bottom end of the mobile phone through the plug connector, and the audio signal of the mobile phone is connected. Converted into a frequency modulation signal and sent to the car radio, the working power of the FM signal transmitting module is obtained from the data interface of the bottom of the mobile phone, and there is no need to separately set the power supply to reduce the volume; the transmitting frequency of the FM signal is freely controlled by the control program in the mobile phone, The controllability is strong; the mobile phone protective cover of the invention can be arranged without any button, the structure is simple, and the cost is low; the frequency modulation signal transmitting module is arranged in the lower frame, no connection line is needed, the structure is simplified, and the use is convenient.

In addition, the invention has the FM signal transmitting module disposed in the mobile phone protective cover than the integrated in the mobile phone, and the signal effect is better, and the FM signal transmitting module has more design space, and the user can install it according to his own needs, and is convenient to use. Reduce the production cost of mobile phones.

DRAWINGS

1 is a front view showing the structure of a protective cover for a mobile phone of the present invention;

2 is a schematic perspective structural view of a portion of a protective cover for a mobile phone according to the present invention;

3 is a circuit block diagram of a portion of a mobile phone case of the present invention;

4 is a schematic diagram of a circuit principle in a portion of a protective cover for a mobile phone according to the present invention;

5 is a flow chart of the operation of the control program in the mobile phone of the present invention;

FIG. 6 is a partial flow chart of the operation of the FM signal transmitting module in the mobile phone case of the present invention.

detailed description

The structure of the present invention is further described below in conjunction with the drawings and a preferred embodiment:

Referring to FIG. 1 to FIG. 4, the mobile phone case of the present invention comprises a protective cover body 1 , and the protective cover body 1 is provided with a plug connector 2 which is inserted into the interface of the mobile phone data line; the plug connector 2 is preferably Lightning plug connector, Lightning plug connector can be used with the Lightning interface of iPhone5 brand mobile phones.

The protective cover body 1 is packaged with a microprocessor control unit connected to the plug connector 2, and a frequency modulation signal transmitting unit connected to the microprocessor control unit; the microprocessor control unit and the FM signal transmitting unit are preferably packaged. In the bottom frame of the protective cover body 1. In order to enable the protective cover of the present invention to conveniently charge the mobile phone, the protective cover body 1 is provided with a Micro connected to the plug connector 2 USB interface 3.

The microprocessor control unit includes an MCU chip U2 of the type D4110A and a watchdog circuit U3 and an I2C bus chip U1 connected to the MCU chip U2. The microprocessor control unit is configured to audio the digital signal outputted by the data line interface of the mobile phone. Decoding, providing audio signal input for the FM signal transmitting unit, and adjusting and controlling the FM signal transmitting unit according to the control signal outputted by the mobile phone data line interface; the microprocessor control unit is also opposite to a USB audio device, and the mobile phone will play the audio generated The sound signal and the control signal to the FM signal transmitting unit are transmitted to the microprocessor control unit by the data line interface of the mobile phone according to the transmission protocol, and then the digital signal conversion of the sound signal is performed by the microprocessor control unit to form an audio signal. And transmitting to the FM signal transmitting unit, the FM signal transmitting unit, for converting the audio signal outputted by the microprocessor control unit into a frequency modulated signal and wirelessly transmitting to the FM signal receiving device, such as: a car radio, a home audio system with a radio function Wait. The FM signal transmitting unit adopts an FM transceiver chip U4 of the type QN8007. The control signal for controlling the FM signal transmitting unit includes an adjustment of the transmission frequency and a switch control signal.

In order to prevent the use of the earphone interface of the mobile phone after the cover of the present invention is attached to the mobile phone, it is convenient for the earphone to be plugged in, and the dustproof effect is achieved before the earphone is used. The bottom edge of the protective cover body corresponds to the earphone interface of the mobile phone. The position is provided with an openable aperture cover 11.

The FM transmission system including the above mobile phone protection cover includes the mobile phone protection cover and a mobile phone disposed in the mobile phone protection cover; the bottom end of the mobile phone has a data line interface, and the music player is installed in the mobile phone. The plug connector of the mobile phone case is inserted into the data line interface of the mobile phone, and the mobile phone is further equipped with a control program for controlling the working state of the FM signal transmitting module in the mobile phone case; the control program includes An FM adjustment unit, a music playback control unit, a switch control unit, a storage unit, a status detection unit, and a regional setting unit.

The FM adjusting unit is configured to generate an adjustment operation code according to the adjustment operation of the user, and send the data to the microprocessor control unit in the protection sleeve of the mobile phone through the data line interface, and the operation control code is decoded by the microprocessor control unit, and then The microprocessor control unit controls the transmission frequency of the FM transmitting unit, so that the FM signal transmitting unit realizes wireless transmission of the decoded audio signal into a frequency modulated signal to a car radio, a home audio system with a radio function, and the like.

The music playing control unit is configured to start the music player in the mobile phone, and transmit the audio signal played by the music player to the FM signal transmitting module of the mobile phone protective cover through the data line interface, and the tuning signal transmitting module is used to tune the wave The mode is transmitted to the FM signal receiving device.

The switch control unit is configured to control whether the audio signal of the mobile phone needs to be transmitted to the FM signal transmitting module through the data line interface, so as to realize the control of the transmitting state of the FM signal transmitting module. For example, when the mobile phone audio needs to be played by the car or the home audio system, the FM adjustment unit is first adjusted to the corresponding frequency, and then the transmission control state is turned on by the switch control unit, and the transmission signal is transmitted to the FM signal transmission module while the transmission state is being turned on. Operation code.

The storage unit is used for recording and storing the frequently used frequency value when the FM adjustment unit is adjusted, so that the user can quickly call it.

The state detecting unit is configured to detect whether the data line interface of the FM signal transmitting module and the mobile phone is in a connected state; when detecting the non-connected state, prompting the user to insert.

Regional setting unit, For the region in which the invention is located, the corresponding adjustable FM frequency range is selected for the FM adjustment unit. Because the FM frequency range is different in different regions, the range of equipment for receiving FM signals is different. For example, the FM frequency range in China is 87.5-108MHz, while the FM frequency range in Japan is 76-90MHz. In order to adapt the present invention to normal use in a plurality of regions, it is preferable to add a regional setting unit; of course, in order to solve the technical problem, it is also possible to expand the adjustable range of the FM adjusting unit, for example, to: 64- 125MHZ ultra wide frequency range.

Referring to FIG. 1 and FIG. 2, the frame of the protective cover of the present invention has certain elasticity. Before use, the bottom end of the mobile phone is first placed in the frame, and the data line interface of the bottom end is matched with the plug connector. Then, the top of the mobile phone can be buckled into the present invention. When the car audio system is required to play the mobile phone music, the FM signal transmitting module of the present invention is activated by the mobile phone to establish a wireless connection with the radio of the car audio system, the radio is adjusted to the frequency corresponding to the FM signal transmitting module, or the radio is adjusted to any idle state. Channel, through the software control in the mobile phone to adjust the transmission frequency of the FM signal transmission module, so that it is the same as the radio frequency, easy to use, get rid of the connection line.

Referring to FIG. 5, the workflow of the control program in the mobile phone is as follows:

1) The software starts, and the control program is called through the built-in menu of the mobile phone to start the software;

2) Detect the accessory and establish a connection, check the status of the data line interface at the bottom of the mobile phone, and determine whether the plug connector of the mobile phone case is connected. If the connection is successful, go to the next step, otherwise cycle detection;

3) establishing a connection with the accessory and synchronizing the data with the accessory, that is, establishing a connection with the FM signal transmitting module in the mobile phone case, and performing data synchronization with the control unit of the FM signal transmitting module;

4) Enter the main interface of the control program;

5) After entering the main interface of the control program, the user can perform the following operations:

a, call the FM adjustment unit to adjust the FM frequency operation; in the main interface, the operation mode may be to adjust the transmission frequency through the adjustment disk, or to increase or decrease the transmission frequency by the forward and reverse arrows;

b, call the storage unit to store the frequency, extract the pre-stored data when single-pressing, enter the modified pre-stored state when long press, short press again, the current transmitting frequency is saved in the pressed button position;

c. When the music icon is clicked, the music player is automatically retrieved by the music playback control unit to perform music playback control;

d, call the regional setting unit to set the area, set the corresponding frequency adjustable range;

e. The switch control unit changes the launch state. The button in the upper right corner is used as the launch switch. Each time the click is made, the launch state changes once. The center disc is used to indicate the launch status. When the launch is turned on, it displays green. When it is turned off, it displays. red;

6) After the user completes the operation, the interface status is updated;

7) After entering the main interface of the control program, the state detecting unit terminates the state of detecting the accessory, and reads data from the accessory, that is, whether the data line interface of the FM signal transmitting module and the mobile phone is connected; when detecting the non-connected state , prompt the user to insert and return to wait for the connection to be established.

Referring to FIG. 6, the working process of the FM signal transmitting module in the mobile phone case of the present invention is as follows:

a, power on initialization microprocessor control unit;

b. Initializing a frequency modulation signal transmitting unit;

c. detecting whether the IPhone5 mobile phone is inserted, that is, the control unit of the FM signal transmitting module detects whether the plug connector and the data line interface of the mobile phone are connected;

d. The microprocessor control unit performs the IPhone5 mobile phone accessory product certification according to the coded signal sent by the mobile phone, and then determines whether the session is open, and determines whether the switch control unit in the control program is turned on, and if the session is opened and the launch switch is turned on, Go to the next step; otherwise loop detection waits;

e. The control unit of the FM signal transmitting module adjusts the transmitting frequency of the FM signal transmitting unit according to the code sent by the mobile phone, and tunes and transmits the audio signal of the mobile phone.

Claims (8)

A mobile phone protective cover with wireless audio transmission, comprising a protective cover body, wherein the protective cover body is provided with a plug connector that is inserted into the interface of the mobile phone data line, and the feature is that the protective cover body is packaged with a microprocessor control unit connected to the plug connector, and a frequency modulation signal transmitting unit connected to the microprocessor control unit; The microprocessor control unit is configured to perform audio decoding on the digital signal outputted by the data line interface of the mobile phone, provide audio signal input for the FM signal transmitting unit, and adjust and control the FM signal transmitting unit according to the control signal output by the mobile phone data line interface; The FM signal transmitting unit is configured to convert the audio signal output by the microprocessor control unit into a frequency modulated signal and wirelessly transmit the signal to the FM signal receiving device. A mobile phone case with wireless audio transmission according to claim 1, wherein the plug connector is a Lightning plug connector. The mobile phone case with wireless audio transmission according to claim 1, wherein the protective cover body is provided with a charging device for charging the mobile phone. USB interface. The mobile phone case with wireless audio transmission according to claim 1, wherein the microprocessor control unit comprises an MCU chip of the type D4110A and a watchdog circuit connected to the MCU chip. The mobile phone case with wireless audio transmission according to claim 1, wherein the FM signal transmitting unit adopts an FM transceiver chip of the type QN8007. The FM transmission system of the mobile phone case according to any one of claims 1 to 5, comprising the mobile phone protection cover and a mobile phone disposed in the mobile phone protection cover; the bottom end of the mobile phone is provided with a data line interface The plug connector of the mobile phone protective cover is inserted into the data line interface of the mobile phone, and the feature is that: the mobile phone is further equipped with a control program for controlling the working state of the FM signal transmitting module in the mobile phone protective cover; The described control procedures include: An FM adjusting unit is configured to generate an adjustment operation code according to a user's adjustment operation, and send the frequency modulation signal transmission module to the mobile phone protection sleeve through the data line interface to provide a frequency adjustment control signal, thereby implementing the FM signal transmission module. Adjustment operation of the transmission frequency; a music playing control unit is used for starting the music player in the mobile phone, and transmitting the audio signal played by the music player to the FM signal transmitting module of the mobile phone protective cover through the data line interface, and the tuning signal transmitting module is used to tune the wave The mode is transmitted to the FM signal receiving device; A switch control unit is configured to control whether the audio signal of the mobile phone needs to be transmitted to the FM signal transmitting module through the data line interface. The FM transmitting system of claim 6 wherein said control program comprises: The storage unit is used for recording and storing the commonly used frequency values of the FM adjustment unit for quick recall by the user. The FM transmitting system of claim 6 wherein said control program comprises: A state detecting unit is configured to detect whether the data line interface of the FM signal transmitting module and the mobile phone is in a connected state; when detecting the non-connected state, prompting the user to insert it.

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