Audio device with mute function

Patent metadata

Field	Value
Publication number	US-9112468-B2
Application number	US-201313750726-A
Country	US
Kind code	B2
Filing date	Jan 25, 2013
Priority date	Jul 24, 2012
Publication date	Aug 18, 2015
Grant date	Aug 18, 2015

Abstract

An audio device prevents an excessive volume output in a case such as when a set of headphones is replaced or a power supply is turned ON from OFF. A mute control circuit includes a switch that detects insertion of a headphone plug and a switch that detects a volume position. When no insertion of a headphone plug is detected, a mute mode is activated to output no audio signals. When insertion of a headphone plug is detected and it is not detected that the volume position is set at a mute position or near to the mute position, the mute mode is maintained, while when it is detected that the volume position is set at the mute position or near to the mute position, the mute mode is canceled.

First claim

What is claimed is:

1. An audio device with a mute function, comprising: a first detection unit that detects insertion of a headphone plug; a second detection unit that detects a volume position;
and a control unit that controls a mute mode when a power supply is ON such that when the first detection unit detects no insertion of the headphone plug, the mute mode is activated so as not to output an audio signal, when the first detection unit detects the insertion of the headphone p…

Assignees

• Teac Corp

Inventors

• Watanabe Kazuo

Classifications

• H03G3/20 Primary

  Electricity · mapped topic

• H04R2430/01

  Electricity · mapped topic

• H04R2420/03

  Electricity · mapped topic

• H04R3/007 Primary

  Electricity · mapped topic

• H04R29/001

  Electricity · mapped topic