Patent Application
20060258411
1. Field of the Invention
The present invention relates to a multifunction audio wireless transmission device and a wireless earphone and, more particularly, to a multifunction audio wireless transmission device capable of connecting an external audio output device and to a wireless earphone capable of receiving broadcasts and being used as a handsfree set by means of circuit control.
2. Description of Related Art
A prior art mobile phone is generally held close to an ear by a hand for use. This will cause much inconvenience in use or may even bring about an accident when a user drives a car or rides a motorcycle. Moreover, a mobile phone in use will emit high-frequency EM waves of high power to cause damage to the human body. Therefore, handsfree mobile phones have been proposed. Handsfree mobile phones can generally be divided into the car-type and the personal-type. A car-type handsfree has a transmission line connected to a mobile phone and a power line plugged into the car lighter. A personal-type handsfree is generally a wired device. Although it can reduce the danger in driving, there is still inconvenience such as entanglement of wire or bad contact due to pull and drag of the wire in use. Moreover, because entanglement of the connection wire blocks some space of the gear shift lever, the user may erroneously touch the handsfree or even damage the mobile phone due to pull and drag of the wire.
Because the prior art handsfree mobile phone has inconvenience and drawbacks in practical use, wireless earphones have become available in the market. A mobile phone base matching the wireless earphone is usually disposed on the mobile phone. The wireless earphone is hung on an ear of a user. Although wireless transmission can solve the problems of entanglement of wire and harm to the human brain due to high-frequency EM waves, there is still no wireless earphone integrating the functions of handsfree mobile phone, music player, and broadcasting device.
One object of the present invention is to provide a multifunction audio wireless transmission device and a wireless earphone, which integrates the functions of a handsfree mobile phone, a music player, and a broadcasting device through a broadcaster, a speaker, and a plurality of push-on switches built in the circuit thereof.
To achieve the above object, the present invention proposes a multifunction audio wireless transmission device and a wireless earphone. The multifunction audio wireless transmission device comprises an audio transmission interface connected to the mobile phone to receive an audio signal output by the mobile phone, a signal processing unit connected to the audio transmission interface to receive and then process the audio signal, and a wireless transmission unit connected to the signal processing unit and the wireless earphone to send the processed audio signal to the remote wireless earphone and receive an answer signal output by the wireless earphone. Bidirectional audio transmission between the wireless earphone and the mobile phone is thus accomplished via the audio transmission interface and the wireless transmission unit.
The wireless earphone comprises a control and processing unit connected to a broadcaster, an output unit, a microphone, a wireless transmission unit and a push-on switch unit. The push-on switch unit outputs a control signal to the control and processing unit. The control and processing unit controls the wireless transmission unit to receive an audio signal output by the multifunction audio wireless transmission device. The control and processing unit processes the audio signal and then sends the processed audio signal to the output unit. A user can utilize the microphone to input voice messages, which are processed by the control and processing unit and then sent to the multifunction audio wireless transmission device via the wireless transmission unit. Bidirectional audio transmission between the wireless earphone and the multifunction audio wireless transmission device is thus accomplished via the wireless transmission unit.
The push-on switch unit outputs the control signal to the control and processing unit to control the broadcaster, which outputs a broadcast signal. The broadcast signal is a stereo sound signal. The broadcast signal is output to the output unit. The output unit receives the broadcast signal and then converts the broadcast signal to an output sound signal. The wireless earphone can thus control the broadcast function of the broadcaster.
The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing, in which:
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The audio transmission interface 20 is connected externally with an audio output device to get a sound signal. The sound signal is processed by the signal processing unit 22 and transmitted by the wireless transmission unit 24 to the wireless earphone 3. A user can listen to music played by the audio output device via the wireless earphone 3. The audio output device is a music playback device, and can be an MP3 player, a music CD player, or a television. The wireless transmission unit 24 is a bluetooth wireless module or a wireless emission module.
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The wireless transmission unit 24 is connected to the signal processing unit 22, and is formed by connecting an antenna 241, a mixer 242, a transmission amplifier 243, a receiving amplifier 244, a multiplex radio-frequency processor 245 and a voltage controlled oscillator (VCO) 246. The wireless transmission unit 24 is controlled by the signal processing unit 22 to perform bidirectional wireless transmission.
The audio signal input to the audio transmission interface 20 is processed and then sent to the wireless earphone 3 via the wireless transmission unit 24, or the answer signal from wireless earphone received by the wireless transmission unit 24 is processed and then sent to the mobile phone 1 via the audio transmission interface 20.
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The wireless transmission unit 31 is connected to the control and processing unit 30, and is formed by connecting an antenna 311, a mixer 312, a transmission amplifier 313, a receiving amplifier 314, a multiplex radio-frequency processor 315 and a voltage controlled oscillator (VCO) 316. The wireless transmission unit 31 is controlled by the control and processing unit 30 to perform wireless transmission.
The output unit 36 has the functions of a speaker and an earphone, and is connected to the control and processing unit 30. The output unit 36 is controlled by the control and processing unit 30 to send out the received signal from the wireless transmission unit 31. A user can communicate by the microphone 32. This audio signal is input to the wireless transmission unit 31 and processed and then wirelessly sent to the multifunction audio wireless transmission device 2. Or the signal from the multifunction audio wireless transmission device 2 is received by the wireless transmission unit 31 and processed and then sent out by the output unit 36 to respond to the user. The wireless earphone 3 can also be used as a handsfree, used for listening to music and broadcasts, or used for channel selection.
A user can output a control signal to the control and processing unit 30 by operating the push-on switch unit 38. The control and processing unit 30 controls actions of the wireless transmission unit 31, the broadcaster 34 and the output unit 36 connected thereto based on the control signal. The microphone 32 is connected to the control and processing unit 30 for sound source input of user. The input sound source is processed by the control and processing unit 30 and then sent to the remote multifunction audio wireless transmission device 2 via the wireless transmission unit 31.
The push-on switch unit 38 controls the control and processing unit 30 to perform a volume/handsfree switching function, a frequency/music switching function, a broadcast/wireless earphone switching function, a broadcast channel selection function and a broadcast type switching function.
When the control and processing unit 30 performs the volume/handsfree switching function, it is used to adjust the volume of the output unit 36. When a volume/handsfree-communication switch 381 is pressed for more than 3 seconds, a handsfree-communication function is switched to, and the wireless earphone is used as a handsfree mobile phone. When the volume/handsfree-communication switch 381 is pressed for more than 3 seconds again, the volume adjustment function is resumed. When the control and processing unit 30 performs the frequency/music switching function, if a frequency/music transfer switch 382 is pressed for less than 3 seconds, different receiving frequencies can be selected. If the frequency/music transfer switch 382 is pressed for more than 3 seconds, a music mode is switched to, and the user can listen to a CD, MP3 or television. When frequency/music transfer switch 382 is pressed for more than 3 seconds again, the frequency selection function is resumed.
When the control and processing unit 30 performs the broadcast/wireless earphone switching function, if a broadcast transfer switch 383 is not pressed yet, the wireless earphone is in an ordinary wireless earphone mode. If the broadcast transfer switch 383 is pressed for more than 3 seconds, a broadcast listening mode is switched to. If the broadcast transfer switch 383 is pressed for more than 3 seconds again, the wireless earphone mode is resumed. When the control and processing unit 30 performs the broadcast channel selection function, a channel selection switch 384 is used to select the broadcast channel. When the control and processing unit 30 performs the broadcast type switching function, a broadcast type transfer switch 385 is used to select the broadcast type such as FM, AM, SW1 and SW2.
A user can input a sound source via the microphone 32. The sound source is processed by the control and processing unit 30 and then sent to the remote multifunction audio wireless transmission device 2 via the wireless transmission unit 31 for bidirectional wireless transmission of voice. Moreover, the wireless earphone 3 can be used as a handsfree mobile phone, for listening to music and broadcasts, or for channel selection.
Reference is made to
Although the present invention has been described with reference to the preferred embodiment thereof, it will be understood that the invention is not limited to the details thereof. Various substitutions and modifications have been suggested in the foregoing description, and other will occur to those of ordinary skill in the art. Therefore, all such substitutions and modifications are intended to be embraced within the scope of the invention as defined in the appended claims.
