Headset having remote control for multimedia playback device
View Patent ↗A headset having remote controls for a multimedia playback device is provided. The headset is electrically connected to an audio playback device and includes a jack plug for coupling the headset to the audio playback device; a body having a left and a right speaker unit and a microphone that is connected to the jack plug through a cable, and a remote control circuit that is interposed between the jack plug and the body, generating control signals for controlling the audio playback device. The headset is implemented with a remote control circuit on a signal link connecting the headset and a mobile phone, thereby improving portability of the mobile phone and user convenience in controlling the audio playback related function of the mobile phone.
1. A headset electrically connected to a mobile phone, comprising:
a jack plug for coupling the headset to the mobile phone;
a body having a left speaker unit and a right speaker unit and a microphone, connected to the jack plug through a cable; and
a remote control circuit connected between the jack and the body, comprising a plurality of voltage dividers interconnected between the microphone and a ground in parallel, the remote control circuit being configured to output a voltage value corresponding to a selected voltage divider among the plurality of voltage dividers to a Mobile Station Modem (MSM) for controlling a call and audioplayback through the jack plug,
wherein the call comprises a call request/connection release signal of the mobile phone.
2. The headset of claim 1 , wherein the jack plug comprises:
a first electrode connected to the microphone through a first signal link;
a second electrode connected to the left speaker unit through a second signal link;
a third electrode connected to the right speaker unit through a third signal link; and
a fourth electrode grounded through a fourth signal link.
3. The headset of claim 2 , wherein the plurality of voltage dividers are interconnected between the first signal link and the fourth signal link in parallel, for generating the control signals.
4. The headset of claim 2 , wherein the remote control circuit comprises:
a first voltage divider interconnected between the first signal link and the fourth signal link for generating a first control signal;
a second voltage divider interconnected between the first signal link and the fourth signal link for generating a second control signal;
a third voltage divider interconnected between the first signal link and the fourth signal link for generating a third control signal; and
a fourth voltage divider interconnected between the first signal link and the fourth signal link for generating a fourth control signal.
5. The headset of claim 4 , wherein the first voltage divider comprises a first switch.
6. The headset of claim 4 , wherein the second voltage divider comprises a second switch and a first resistor that are connected in series.
7. The headset of claim 4 , wherein the third voltage divider comprises a third switch and a second resistor that are connected in series.
8. The headset of claim 4 , wherein the fourth voltage divider comprises a fourth switch and third resistor that are connected in series.
9. The headset of claim 4 , wherein the first voltage divider comprises a first switch, the second voltage divider comprises a second switch and a first resistor that are connected in series, the third voltage divider comprises a third switch and a second resistor that are connected in series, and the fourth voltage divider comprises a fourth switch and a third resistor that are connected in series.
10. The headset of claim 4 , wherein the first control signal is the call request/connection release signal, the second control signal is a play/stop signal, the third control signal is a rewind signal, and the fourth control signal is a fast forward signal.
11. The headset of claim 2 , wherein the remote control circuit comprises a volume controller interconnected between the fourth signal link and the second and third signal links.
12. The headset of claim 11 , wherein the volume controller comprises an adjustable resistor.
13. The headset of claim 1 , wherein the remote control circuit comprises the plurality of voltage dividers interconnected between an electrode connected to the microphone and a ground electrode in parallel.