Method and terminal device for implementing audio connector interface conversion

A terminal device, comprising:

• a 4-pin jack of an audio connector, installed inside the terminal device and configured to input or output signals;
• a serial communication unit, configured to process, receive, or send serial signals;
• a logical circuit unit, configured to:
• connect a serial signal transmitting end, signal receiving end, power end, and grounding end on a serial port of the serial communication unit to a connecting end on the 4-pin jack of the audio connector, judge working mode of an interface of the audio connector, and send a judgment result to a controlling unit;
• the controlling unit, configured to control input or output of the serial signals on the serial communication unit according to the judgment result by the logical circuit unit;
• and
• an audio interface unit, configured to output audio signals, wherein a signal end of the audio interface unit is connected to a connecting end of the 4-pin audio connector through the logical circuit unit;
• wherein, the controlling unit instructs the audio interface unit to output signals when the logical circuit unit judges that the interface of the audio connector works in audio output mode.

A terminal device, comprising:

• a 4-pin jack of an audio connector, installed inside the terminal device and configured to input or output serial signals;
• and
• an interface processing unit, configured to provide serial ports, and process, receive, or send the serial signals;
• wherein, a serial signal transmitting end, signal receiving end, power end, and grounding end on the serial port of the interface processing unit are connected to four connecting ends on the jack of the audio connector.

A terminal device, comprising:

• 4-pin jack of an audio connector, installed inside the terminal device and configured to input or output signals;
• an interface processing unit, configured to provide an infrared interface, and receive or send infrared signals;
• an audio interface unit, configured to output audio signals, wherein a signal end of the audio interface unit is connected to a connecting end of the 4-pin jack of the audio connector through a logical circuit unit;
• and a controlling unit, configured to control input or output of the infrared signals on the interface processing unit or output of the audio signals on an audio signal interface unit.

A method for implementing conversion of an interface on an audio connector, comprising:

• installing a 4-pin jack of an audio connector inside a terminal device, and connecting a power end, signal end, and grounding end of an infrared interface on a terminal service control module and a serial signal transmitting end, serial signal receiving end, power end, and grounding end on the terminal service control module directly or through a logical circuit unit to four connecting ends on the jack of the audio connector;
• transmitting an infrared signal, power signal, and grounding signal through the jack of the audio connector when the audio connector works in infrared mode;
• and
• transmitting a serial power signal, serial receiving signal, sending signal, and grounding signal through the jack of the audio connector when the audio connector works in serial mode.

A method for providing a serial port based on an interface of an audio connector, comprising:

• installing a 4-pin jack of an audio connector inside a terminal device, and connecting a signal output end on an audio interface unit and a serial signal transmitting end, serial signal receiving end, power end, and grounding end on a terminal service control module through a logical circuit unit to four connecting ends on the jack of the audio connector;
• transmitting audio output signals through the jack of the audio connector when the 4-pin audio connector works in audio output mode;
• and
• transmitting a serial power signal, serial receiving signal, sending signal, and grounding signal through the jack of the 4-pin audio connector when the audio connector works in the serial mode.

A method for providing an infrared interface based on an interface of an audio connector, comprising:

• installing a 4-pin jack of an audio connector inside a terminal device, and connecting a signal output end on an audio interface unit and a power end, signal end, and grounding end on an interface processing unit of the terminal device through a logical circuit unit to four connecting ends on the jack of the audio connector;
• transmitting audio output signals through the jack of the audio connector when the audio connector works in the audio output mode;
• and
• transmitting an infrared signal, power signal, and grounding signal through the jack of the audio connector when the audio connector works in the infrared mode.