SE9902341L - Apparatus and method for detecting proximity using an antenna - Google Patents

Apparatus and method for detecting proximity using an antenna

Info

Publication number
SE9902341L
SE9902341L SE9902341A SE9902341A SE9902341L SE 9902341 L SE9902341 L SE 9902341L SE 9902341 A SE9902341 A SE 9902341A SE 9902341 A SE9902341 A SE 9902341A SE 9902341 L SE9902341 L SE 9902341L
Authority
SE
Sweden
Prior art keywords
antenna
proximity
impedance
vctpr
loudspeaker
Prior art date
Application number
SE9902341A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE9902341D0 (en
Inventor
Ulf Lindgren
Christian Bjoerk
Original Assignee
Ericsson Telefon Ab L M
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Priority to SE9902341A priority Critical patent/SE9902341L/en
Publication of SE9902341D0 publication Critical patent/SE9902341D0/en
Priority to AU58639/00A priority patent/AU5863900A/en
Priority to PCT/SE2000/001324 priority patent/WO2000079769A1/en
Publication of SE9902341L publication Critical patent/SE9902341L/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
    • H04M1/6041—Portable telephones adapted for handsfree use
    • H04M1/605—Portable telephones adapted for handsfree use involving control of the receiver volume to provide a dual operational mode at close or far distance from the user
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2250/00—Details of telephonic subscriber devices
    • H04M2250/12—Details of telephonic subscriber devices including a sensor for measuring a physical value, e.g. temperature or motion

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Transceivers (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephone Function (AREA)

Abstract

An electronic device (e.g. a mobile telephone) providing wireless communication, comprising: an antenna (7; 304; 404), with an impedance, to radiate an electromagnetic field at radio frequencies; a communication circuit (301; 401) connected to the antenna (7; 303; 404) to transmit and receive the communications signals; a loudspeaker (11; 603) and a proximity sensor (302, 305, 306, 307; 402, 405, 406, 407) to provide a control signal (Vctpr) indicative of whether an object (408) is in the proximity of the device. The device is characterized in that the proximity sensor is connected to the antenna (7; 303; 404) to monitor the impedance of the antenna, to modify the control signal (Vctpr) in response to changes of the impedance, and to control the volume of sound emitted by the loudspeaker (11; 603). Thereby a single antenna is used both for providing wireless communication of e.g. speech and/or data signals, while the antenna is used to sense whether an object is present in the proximity of the antenna, thereby avoiding damage to a user's hearing due to a high sound pressure. The invention also relates to a method of detecting whether an object is in the proximity of a communication device.
SE9902341A 1999-06-21 1999-06-21 Apparatus and method for detecting proximity using an antenna SE9902341L (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE9902341A SE9902341L (en) 1999-06-21 1999-06-21 Apparatus and method for detecting proximity using an antenna
AU58639/00A AU5863900A (en) 1999-06-21 2000-06-20 Apparatus and method of detecting proximity by means of an antenna, and controlling a loudspeaker
PCT/SE2000/001324 WO2000079769A1 (en) 1999-06-21 2000-06-20 Apparatus and method of detecting proximity by means of an antenna, and controlling a loudspeaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9902341A SE9902341L (en) 1999-06-21 1999-06-21 Apparatus and method for detecting proximity using an antenna

Publications (2)

Publication Number Publication Date
SE9902341D0 SE9902341D0 (en) 1999-06-21
SE9902341L true SE9902341L (en) 2001-02-21

Family

ID=20416167

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9902341A SE9902341L (en) 1999-06-21 1999-06-21 Apparatus and method for detecting proximity using an antenna

Country Status (3)

Country Link
AU (1) AU5863900A (en)
SE (1) SE9902341L (en)
WO (1) WO2000079769A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002102036A1 (en) * 2001-06-13 2002-12-19 Siemens Aktiengesellschaft Mobile telephone
GB2382241B (en) * 2001-11-07 2006-08-09 Sendo Int Ltd Speaker volume control means and method of operation
JP4198552B2 (en) * 2003-07-25 2008-12-17 株式会社エヌ・ティ・ティ・ドコモ Wireless receiver, wireless transmitter, and impedance control method
US20050026568A1 (en) * 2003-08-01 2005-02-03 Hawker Larry E. System and method of acoustically safe automatic handsfree volume adjustment
DE102004019353B3 (en) 2004-04-21 2005-09-15 Siemens Audiologische Technik Gmbh Control system using proximity sensor and evaluation unit for hearing aid enables control functions when user's hand is moved near ear with installed hearing aid
US7196316B2 (en) 2004-09-22 2007-03-27 Avago Technologies Ecbu Ip (Singapore) Pte. Ltd. Portable electronic device with activation sensor
GB2464868B (en) * 2004-09-22 2010-06-16 Avago Tech Ecbu Ip Folding telephone
GB2515830A (en) * 2013-07-05 2015-01-07 Broadcom Corp Method and apparatus for use in a radio communication device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5224151A (en) * 1992-04-01 1993-06-29 At&T Bell Laboratories Automatic handset-speakephone switching arrangement for portable communication device
FI963389A (en) * 1996-08-30 1998-03-01 Nokia Mobile Phones Ltd Instructional system for hand portable phone

Also Published As

Publication number Publication date
SE9902341D0 (en) 1999-06-21
AU5863900A (en) 2001-01-09
WO2000079769A1 (en) 2000-12-28

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Legal Events

Date Code Title Description
NAV Patent application has lapsed