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1. (WO2013155921) METHOD AND ELECTRONIC DEVICE FOR DETERMINING WIRE SEQUENCE OF EARPHONE

Pub. No.:    WO/2013/155921    International Application No.:    PCT/CN2013/073148
Publication Date: Fri Oct 25 01:59:59 CEST 2013 International Filing Date: Tue Mar 26 00:59:59 CET 2013
IPC: H04M 1/725
Applicants: HUAWEI DEVICE CO., LTD.
华为终端有限公司
Inventors: XIAO, Wenchao
肖文超
YANG, Wentao
杨文涛
YANG, Jun
杨峻
Title: METHOD AND ELECTRONIC DEVICE FOR DETERMINING WIRE SEQUENCE OF EARPHONE
Abstract:
Disclosed are a method and an electronic device for determining a wire sequence of an earphone. A third pin and a fourth pin on an earphone plug are connected to a direct current power source to form a power source branch, and the power source branch is connected in series to a bias resistor. According to the present invention, a second voltage between the third pin and the fourth pin is obtained, and is compared with a preset first threshold, and a signal type of a signal transmitted by the third pin and a signal type of a signal transmitted by the fourth pin are determined according to a comparison result. According to the present invention, a voltage can be applied between the third pin and the fourth pin in the earphone according to electrical connection conditions in earphones with different wire sequences, and then, a voltage drop between the third pin and the fourth pin is detected and is compared with the preset threshold, so as to determine a wire sequence of the earphone according to a different comparison result. After the wire sequence of the earphone is determined, a user can conveniently select a terminal matching the wire sequence of the earphone to use the earphone, thereby improving the user experience.