Integrated mobile-phone handsfree kit combining with vehicular stereo loudspeakers
US6134456A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 15, 1998 |
| Grant date | Oct 17, 2000 |
| Priority date | — |
| Expiry date | Jun 15, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/13
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An integrated mobile-phone handsfree kit combined with an existing vehicular stereo system utilizes the high power and high performance audio output characteristics to provide drivers with a safe, comfortable and high quality conversation environment in vehicle. The invention comprises an existing stereo equipment with loudspeakers, and an electric power module connected to the stereo equipment to share the same power supply. The stereo equipment has a sound output wire and an electric power supply input wire. The electric power module has a handsfree kit electric circuit assembly. The handsfree kit electric circuit assembly has a sound source selecting switch unit, a power amplifier, an earphone circuit, an audio fidelity processing unit, an electric power supply unit, a sound source control unit, and an electric power supply switch. The invention makes it possible to integrate the mobile-phone handsfree kit together with a vehicular stereo system to automatically detect the sound source(from stereo or mobile-phone) and then direct the audio signal to the loudspeaker output, and therefore simplifies wiring and eliminates the needs for extra power source and loudspeakers. The integ…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.