Earphone jack handfree

• US 20070042811A1
• Filed: 08/17/2005
• Published: 02/22/2007
• Est. Priority Date: 08/17/2005
• Status: Abandoned Application

• Current Assignee: E-Lead Electronic Co., Ltd.
• Original Assignee: E-Lead Electronic Co., Ltd.
• Inventors: Chen, Tonny
• Application Number:
  US11/205,104
• Publication Number:
  US 20070042811A1
• Time in Patent Office: Days
• US Class Current: 455/569.100
• CPC Class Codes: H04M 1/6041 Portable telephones adapted for handsfree use
• CPC Class Codes: H04M 1/6075 adapted for handsfree use in a vehicle H04M1/6058 takes precedence; arrangements for holding telephones in a vehicle B60R11/0241

Abstract

An earphone jack handsfree includes an earphone jack signal line and a handsfree host. The earphone jack signal line has one end connecting to an earphone jack of a mobile phone and other end connecting to the handsfree host. The handsfree host includes at least a microphone, a speaker, a connection port, a control unit and a call detection unit. The handsfree thus formed can improve compatibility and reduce production and inventory costs.

Claims

1. An earphone jack handsfree, comprising:

an earphone jack signal line having a conductive wire which has a first connector on one end and a second connector on other end, and at least one earphone circuit and one mike circuit, the first connector being inserted into an earphone jack of a mobile phone, the second connector being connected to a handsfree host, output or input of sound signals in the earphone jack of the mobile phone being transmitted through the earphone circuit and the mike circuit;

the handsfree host including at least;

a microphone to receive sound signals of users;

a speaker to output sound signals of a caller or the mobile phone;

a control unit to control operations of elements in the handsfree host;

a connection port connecting to the second connector of the earphone jack signal line; and

a call detection unit including a wave detection circuit to detect electromagnetic signals while the mobile phone is in use for conversation to activate operation of the control unit.

2. The earphone jack handsfree of claim 1, wherein the call detection unit further includes an integration circuit.

3. The earphone jack handsfree of claim 1, wherein the handsfree host further includes an echo cancellation unit.

4. The earphone jack handsfree of claim 3, wherein the echo cancellation unit includes a first digital signal processing circuit located on the mike circuit and connected to the earphone circuit to eliminate input echo.

5. The earphone jack handsfree of claim 3, wherein the echo cancellation unit includes a second digital signal processing circuit located on the earphone circuit and connected to the mike circuit to eliminate line echo.