DE10149941A1 - Mobile radio device with a correction element that reduces the SAR value - Google Patents

Mobile radio device with a correction element that reduces the SAR value

Info

Publication number
DE10149941A1
DE10149941A1 DE10149941A DE10149941A DE10149941A1 DE 10149941 A1 DE10149941 A1 DE 10149941A1 DE 10149941 A DE10149941 A DE 10149941A DE 10149941 A DE10149941 A DE 10149941A DE 10149941 A1 DE10149941 A1 DE 10149941A1
Authority
DE
Germany
Prior art keywords
mobile radio
radio device
keyboard
housing
reduces
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
DE10149941A
Other languages
German (de)
Inventor
Stefan Huber
Thorsten Kowalski
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to DE10149941A priority Critical patent/DE10149941A1/en
Priority to EP02774449A priority patent/EP1435124A1/en
Priority to PCT/DE2002/003813 priority patent/WO2003034537A1/en
Publication of DE10149941A1 publication Critical patent/DE10149941A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/3827—Portable transceivers
    • H04B1/3833—Hand-held transceivers
    • H04B1/3838—Arrangements for reducing RF exposure to the user, e.g. by changing the shape of the transceiver while in use
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/245—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with means for shaping the antenna pattern, e.g. in order to protect user against rf exposure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/526—Electromagnetic shields
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2209/00—Layers
    • H01H2209/002—Materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2209/00—Layers
    • H01H2209/024—Properties of the substrate
    • H01H2209/026—Properties of the substrate metallic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2231/00—Applications
    • H01H2231/022—Telephone handset
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/004—High frequency adaptation or shielding

Abstract

The invention concerns a mobile radiotelephone apparatus comprising a housing and a keypad in the upper part of the housing, said keypad substantially extending in the central zone of the apparatus. To reduce harmful electromagnetic radiation, said keypad comprises among others a support shielding made of an electrically conductive and/or magnetic and/or dielectric material.

Description

Die vorliegende Erfindung betrifft ein Mobilfunkgerät, insbesondere Mobilfunktelefon, mit einem Gehäuse und einer in der Oberseite des Gehäuses vorgesehenen Tastatur, die sich im Wesentlichen im Bereich der Gerätemitte erstreckt. The present invention relates to a mobile radio device, in particular mobile phone, with a housing and one in the The top of the case provided keyboard, which is in the Extends essentially in the area of the center of the device.

Bei Mobilfunkgeräten ist es wünschenswert, die Belastungsdosis an elektromagnetischer Strahlung für den jeweiligen Benutzer möglichst klein zu halten, um potentielle Gesundheitsrisiken möglichst zu vermeiden. For mobile devices, it is desirable that Exposure dose of electromagnetic radiation for the respective Keep users as small as possible to avoid potential Avoid health risks if possible.

Als ein spezifisches Meßkriterium dafür, welchen Strahlungsbelastungen der jeweilige Benutzer tatsächlich ausgesetzt ist, wird der sogenannte SAR-Wert (Specific Absorption Rate) verwendet. Dieser Wert gibt die spezifische Absorbtionsrate in Watt pro Kilogramm an, mit der ein vorgegebener Gewebevolumenbereich, z. B. im Kopf des jeweiligen Benutzers des Mobilfunkgeräts, thermisch belastet wird. As a specific measurement criterion for which Radiation exposure of the respective user is actually exposed the so-called SAR value (Specific Absorption Rate) used. This value gives the specific absorption rate in watts per kilogram with which a given Tissue volume range, e.g. B. in the head of each user Mobile device, is thermally stressed.

Um nun einen Benutzer beim Gebrauch des Mobilfunkgerätes vor potentiellen Gesundheitsgefährdungen durch die von Mobilfunkgerät abgegebene elektromagnetische Strahlungsenergie weitgehend zu schützen, sind in der Praxis eine Vielzahl von Vorsichtsmaßnahmen getroffen. To now present a user when using the mobile device potential health hazards from those of Cellular radio emitted electromagnetic radiation energy To protect to a large extent are in practice a multitude of Precautions taken.

Eine Art für eine Schutzmaßnahme ist z. B. aus der EP 0 603 081 A1 bekannt, bei der eine elektromagnatisch absorbierende Abschirmplatte zwischen der am stärksten strahlenden Zone des Mobilfunktelefons und dem Kopf des jeweiligen Benutzers als eine Art strahlungsblockierende Zwischenwand im Gehäuse des Mobilfunktelefons untergebracht ist. One type of protective measure is e.g. B. from EP 0 603 081 A1 known in which an electro-magnetically absorbing Shield plate between the most bright zone of the Cellular phones and the head of each user as a kind of radiation-blocking partition in the housing of the Mobile phone is housed.

Eine derartige Schutzmaßnahme erfordert allerdings ein zusätzliches Element bzw. mehrere zusätzliche Elemente, wodurch die Herstellung des Mobilfunkgerätes komplizierter und teurer wird. However, such a protective measure requires one additional element or several additional elements, whereby the manufacture of the mobile device is more complicated and expensive becomes.

Aufgabe der vorliegenden Erfindung ist es, ein Mobilfunkgerät der eingangs genannten Art anzugeben, bei welchen ohne zusätzliche Bauelemente ein ausreichender Schutz gegen elektromagnetische Strahlung für den jeweiligen Benutzer gegeben ist. The object of the present invention is a mobile radio device of the type mentioned at the beginning, in which without additional components provide adequate protection against given electromagnetic radiation for the respective user is.

Diese Aufgabe wird erfindungsgemäß für das eingangs angegebene Mobilfunkgerät dadurch gelöst, dass die Tastatur unter anderem eine Tastaturmatte aufweist, welche aus einem elektrisch leitfähigen und/oder magnetisch und/oder dielektrisch wirksamen Material besteht. This object is inventively for the beginning specified mobile device solved by the keyboard under another has a keyboard mat, which consists of a electrically conductive and / or magnetic and / or dielectric effective material.

Diese Art der Schutzmaßnahme ist deshalb zur Herabsetzung der Belastungsdosis an elektromagnetischer Strahlung sehr wirksam, da der Ort der stärksten Abstrahlung des elektromagnetischen Feldes und somit die Ursache für einen hohen SAR-Wert bei der aktuellen Länge der Mobilfunkgeräte, welche wahrscheinlich in Zukunft auch beibehalten wird, im Bereich der Gerätemitte auf der Geräteplatine liegt, welche als Gegenpol zur eigentlichen Antenne wirkt. This type of protective measure is therefore used to reduce the Exposure dose to electromagnetic radiation very much effective because the place of the strongest radiation of the electromagnetic field and thus the cause of a high SAR value at the current length of the mobile devices, which likely to be maintained in the future in the area of Device center is on the device board, which is the opposite pole acts on the actual antenna.

Durch den Einsatz von elektrisch leitfähigen und/oder magnetischen und/oder dielektrisch wirksamen Materialien für die in der Mitte liegende Tastaturmatte kann einerseits die in das menschliche Gewebe eingestrahlte Energie vermindert werden und andererseits kann durch Reflektion die Performance der Antenne verbessert bzw. konstant gehalten werden. Bei der Wahl eines entsprechenden Materials zur Herstellung der Tastaturmatte gelingt es problemlos den SAR-Wert zu senken. Through the use of electrically conductive and / or magnetic and / or dielectric materials for the keyboard mat in the middle can on the one hand the the energy injected into human tissues is reduced and on the other hand, performance can be achieved through reflection the antenna can be improved or kept constant. In the Selection of an appropriate material for the production of the Keyboard mat manages to lower the SAR value without any problems.

Weitere zweckmäßige Ausgestaltungen der vorliegenden Erfindung ergeben sich aus den Unteransprüchen sowie aus der nachfolgenden Beschreibung eines Ausführungsbeispiels eines Mobilfunktelefons gemäß der vorliegenden Erfindung anhand der Figur. Further expedient refinements of the present Invention result from the dependent claims and from the following description of an embodiment of a Mobile phones according to the present invention based on the Figure.

Die Figur zeigt in einer perspektifischen Explosionsdarstellung ein Mobilfunkgerät, bei dem die Erfindung Anwendung findet. The figure shows in a perspective Exploded view of a mobile device in which the invention application place.

In der Figur sind alle wesentlichen Teile des Mobilfunktelefons dargestellt, wobei bei der nachfolgenden Beschreibung aber lediglich auf die wichtigsten Teile eingegangen werden soll. In the figure, all essential parts of the Mobile phones shown, with the description below but only the most important parts are discussed should.

Das Mobiltelefon besteht im wesentlichen aus der Oberschale 1 und der Unterschale 2, wobei sich in der Unterschale 2 ein Akkufach für den Akku 3 befindet und wobei das Akkufach mittels des Deckels 4 abgeschlossen wird. In der Oberschale befindet sich unter anderem das Display mit der Displayabdeckung 5 und die Tastatur 6. Ein Bestandteil der Tastatur 6 ist die Tastaturmatte 7. The mobile telephone consists essentially of the upper shell 1 and the lower shell 2, wherein a battery compartment for the battery 3 is in the lower shell 2, and wherein the battery compartment is closed off by means of the lid. 4 In the upper shell there is, among other things, the display with the display cover 5 and the keyboard 6 . The keyboard mat 7 is a component of the keyboard 6 .

Diese Tastaturmatte 7 erstreckt sich zumindest teilweise im Bereich der Gerätemitte und dient zusätzlich zur Senkung der Belastungsdosis an elektromagnetischer Strahlung für den jeweiligen Benutzer, dessen Kopf sich beim Gebrauch des Mobilfunktelefons auf der Tastatur- und Display-Seite des Mobilfunktelefons befindet. This keyboard mat 7 extends at least partially in the area of the center of the device and additionally serves to reduce the exposure dose to electromagnetic radiation for the respective user, whose head is on the keyboard and display side of the mobile radio telephone when using the mobile radio telephone.

Die Stelle mit der größten elektromagnetischen Abstrahlung befindet sich auf der Platine unterhalb der Tastaturmatte 7, so daß sich zwischen dem Kopf des Benutzers und der Stelle mit der größten elektromagnetischen Abstrahlung des Mobilfunktelefons die Tastaturmatte 7 befindet. The point with the maximum electromagnetic radiation is located on the circuit board below the key mat 7, so that the key mat 7 located between the head of the user and the location with the largest electromagnetic radiation of the mobile phone.

Diese Tastaturmatte ist nun erfindungsgemäß entweder aus einem elektrisch leitfähigen Material und/oder einem magnetisch wirksamen und/oder einem dielektrisch wirksamen Material hergestellt. Durch den Einsatz dieser Materialien wird die abgestrahlte Energie d. h. die in das Gewebe des Kopfs des Benutzers eingestrahlte Energie erheblich vermindert. This keyboard mat is now either according to the invention an electrically conductive material and / or a magnetic effective and / or a dielectric material manufactured. By using these materials the radiated energy d. H. which in the tissue of the head of the User radiated energy is significantly reduced.

Dabei ist es zweckmäßig, dass die magnetischen Materialien eine relative Permeabilität µr aufweisen, welche größer 1 ist und die dielektrisch wirksamen Materialien eine relative Dielektrizitätskonstante εr aufweisen, welche größer als 1 ist. It is expedient for the magnetic materials to have a relative permeability μ r which is greater than 1 and for the dielectrically active materials to have a relative dielectric constant ε r which is greater than 1.

Claims (4)

1. Mobilfunkgerät, insbesondere Mobilfunktelefon, mit einem Gehäuse und einer in der Oberseite des Gehäuses vorgesehenen Tastatur, die sich im Wesentlichen im Bereich der Gerätemitte erstreckt, dadurch gekennzeichnet, dass die Tastatur unter anderem eine Tastaturmatte aufweist, welche aus einem elektrisch leitfähigen und/oder magnetisch und/oder dielektrisch wirksamen Material besteht. 1. Mobile radio device, in particular mobile radio telephone, with a housing and a keyboard provided in the top of the housing, which extends essentially in the area of the center of the device, characterized in that the keyboard has, inter alia, a keyboard mat which consists of an electrically conductive and / or magnetically and / or dielectric material. 2. Mobilfunkgerät nach Anspruch 1, dadurch gekennzeichnet, dass die die Tastaturmatte teilweise aus einem elektrisch leitfähigen und/oder magnetisch und/oder dielektrisch wirksamen Material besteht. 2. Mobile radio device according to claim 1, characterized, that the keyboard mat is partially electric conductive and / or magnetic and / or dielectric effective material. 3. Mobilfunkgerät nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass für die relative Permeabilität des magnetisch wirksamen Materials µr > 1 gilt. 3. Mobile radio device according to claim 1 or 2, characterized in that for the relative permeability of the magnetically active material µ r > 1 applies. 4. Mobilfunkgerät nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass für die relative Dielektizitätskonstante des dielektrisch wirksamen Materials εr > 1 gilt. 4. Mobile radio device according to claim 1 or 2, characterized in that ε r > 1 applies to the relative dielectric constant of the dielectric material.
DE10149941A 2001-10-10 2001-10-10 Mobile radio device with a correction element that reduces the SAR value Withdrawn DE10149941A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE10149941A DE10149941A1 (en) 2001-10-10 2001-10-10 Mobile radio device with a correction element that reduces the SAR value
EP02774449A EP1435124A1 (en) 2001-10-10 2002-10-09 Mobile radiotelephone apparatus comprising a correction element reducing specific absorption rate
PCT/DE2002/003813 WO2003034537A1 (en) 2001-10-10 2002-10-09 Mobile radiotelephone apparatus comprising a correction element reducing specific absorption rate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE10149941A DE10149941A1 (en) 2001-10-10 2001-10-10 Mobile radio device with a correction element that reduces the SAR value

Publications (1)

Publication Number Publication Date
DE10149941A1 true DE10149941A1 (en) 2003-04-30

Family

ID=7702020

Family Applications (1)

Application Number Title Priority Date Filing Date
DE10149941A Withdrawn DE10149941A1 (en) 2001-10-10 2001-10-10 Mobile radio device with a correction element that reduces the SAR value

Country Status (3)

Country Link
EP (1) EP1435124A1 (en)
DE (1) DE10149941A1 (en)
WO (1) WO2003034537A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102591463A (en) * 2012-01-04 2012-07-18 安方高科电磁安全技术(北京)有限公司 Low-radiation keyboard

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3105973C2 (en) * 1980-02-19 1994-05-19 Pitney Bowes Inc Electronically controlled franking machine with shielded keyboard
EP0603081A1 (en) * 1992-12-17 1994-06-22 Alcatel N.V. Portable radio telephone with means for protecting its user from electromagnetic radiation
EP0633585A1 (en) * 1993-07-08 1995-01-11 Philips Patentverwaltung GmbH Housing for electric communication apparatus
DE19600770C2 (en) * 1996-01-11 1997-11-13 Ibm Security film with EMC protection

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5588041A (en) * 1995-01-05 1996-12-24 Motorola, Inc. Cellular speakerphone and method of operation thereof
WO1997036380A1 (en) * 1996-03-26 1997-10-02 Euroconcept 2000 Limited Shielding radio equipment
US6044152A (en) * 1998-01-15 2000-03-28 Ericsson Inc. Shielded keyboard for a portable communication device
WO2002071534A1 (en) * 2001-03-07 2002-09-12 Siemens Aktiengesellschaft Radio communications device comprising an sar value-reducing correction element

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3105973C2 (en) * 1980-02-19 1994-05-19 Pitney Bowes Inc Electronically controlled franking machine with shielded keyboard
EP0603081A1 (en) * 1992-12-17 1994-06-22 Alcatel N.V. Portable radio telephone with means for protecting its user from electromagnetic radiation
EP0633585A1 (en) * 1993-07-08 1995-01-11 Philips Patentverwaltung GmbH Housing for electric communication apparatus
DE19600770C2 (en) * 1996-01-11 1997-11-13 Ibm Security film with EMC protection

Also Published As

Publication number Publication date
WO2003034537A1 (en) 2003-04-24
EP1435124A1 (en) 2004-07-07

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