WO2000056051A1 - Telephone cellulaire a mode d'exposition reduite au rayonnement - Google Patents

Telephone cellulaire a mode d'exposition reduite au rayonnement Download PDF

Info

Publication number
WO2000056051A1
WO2000056051A1 PCT/US1999/005531 US9905531W WO0056051A1 WO 2000056051 A1 WO2000056051 A1 WO 2000056051A1 US 9905531 W US9905531 W US 9905531W WO 0056051 A1 WO0056051 A1 WO 0056051A1
Authority
WO
WIPO (PCT)
Prior art keywords
base unit
signals
interface unit
telephone
user interface
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.)
Ceased
Application number
PCT/US1999/005531
Other languages
English (en)
Inventor
Hubert F. Flamant
Ivan H. Darius
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.)
MTI Inc
Original Assignee
MTI Inc
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 MTI Inc filed Critical MTI Inc
Priority to AU30037/99A priority Critical patent/AU3003799A/en
Priority to PCT/US1999/005531 priority patent/WO2000056051A1/fr
Publication of WO2000056051A1 publication Critical patent/WO2000056051A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/725—Cordless telephones
    • H04M1/737—Characterised by transmission of electromagnetic waves other than radio waves, e.g. infrared waves
    • 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
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/0254—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets comprising one or a plurality of mechanically detachable modules
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/0206—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings
    • H04M1/0208—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings characterized by the relative motions of the body parts
    • H04M1/0214—Foldable telephones, i.e. with body parts pivoting to an open position around an axis parallel to the plane they define in closed position

Definitions

  • the present invention relates generally to cellular phones and, more particularly, to cellular phones designed to reduce a user's exposure to electromagnetic radio frequency ("RF") radiation emissions from cellular phone antennas.
  • RF radio frequency
  • Personal communication devices such as cellular telephones and hand-held radios have proliferated in recent years, and the next generation of these devices is expected to be even more prevalent. While the devices provide users with a convenient means of communication, they raise serious safety concerns, particularly with the users' constant exposure to electromagnetic RF emissions from cellular phone antennas. RF antenna emissions have been reported to be linked to increased risk for head anomalies such as brain cancer.
  • One object of the present invention is to provide a cellular telephone that significantly reduces harmful radiation exposure to all portions of the user's body.
  • Another object of the invention is to provide a cellular phone that reduces radiation exposure and is portable and wireless.
  • a further object of the invention is to provide a cellular phone that reduces radiation exposure and that is easy to use and provides good sound quality.
  • the phone includes a base unit and a detachably connected handset.
  • the base unit includes an antenna for establishing an RF communications link to a wireless communications network. It also includes circuitry for converting RF signals to electrical signals, and electrical signals to RF signals.
  • the handset includes an earpiece and a mouthpiece for receiving and transmitting audio signals to and from a user. It also includes circuitry for converting the input audio signals into electrical signals and electrical signals into output audio signals.
  • the base unit and the handset are attached and used as a single unit.
  • Contacts on the base unit engage corresponding contacts on the handset to enable direct electrical transfer of signals between the base unit and the handset.
  • the handset is detached from the base unit.
  • the base unit is placed a distance of about three feet from the user, and communication between the base unit and the handset is established through an infrared ("IR") optical communications link.
  • IR infrared
  • the phone is portable and wireless. It is also easy to use and provides good sound quality.
  • FIGURE 1 is front view of a cellular phone in accordance with the invention in a folded, non-use position;
  • FIGURE 2 is side view of the cellular phone also in the non-use position;
  • FIGURE 3 is a front view of the cellular phone in a standard use mode
  • FIGURE 4 is a side view of the phone also in a standard use mode
  • FIGURE 5 is a view of a user using the phone in a reduced exposure mode
  • FIGURE 6 is a schematic block diagram illustrating the digital portion of a cellular phone in accordance with the prior art.
  • FIGURE 7 is a schematic block diagram illustrating the IR communication link of the phone in accordance with the invention operating in a reduced exposure mode.
  • FIGURES 1 and 2 illustrate a cellular phone 10 in accordance with the present invention in a folded, non-use position.
  • the phone 10 comprises two detachably connected parts: a base unit 12 and a user interface unit in the form of a handset 14. (The handset 14 is shown folded in FIGURES 1 and 2.)
  • the base unit 12 includes a standard LCD display 16 and a control keypad 18.
  • a telescopic antenna 20 extends from the base unit 12 for cellular RF transmission to a wireless communication network (not shown).
  • the antenna 20 is the source of the radiation for which reduced exposure is desired.
  • the term RF transmission as used in this specification is intended to encompass all transmission frequencies used presently and hereinafter in wireless cellular communication.
  • the handset 14 comprises two members 22, 24 connected by a hinge 26 such that they can be compactly folded.
  • the member 22 contains an earpiece 28, and the member 24 contains an mouthpiece 30.
  • a microphone 32 is positioned at the mouthpiece 30, and a speaker 34 at the earpiece 28.
  • the phone 10 includes a first IR send/receive unit or element 36 located on the base unit 12 and a corresponding second IR send/receive unit or element 38 located on the handset 14 for establishing an IR optical communications link, which will be described in further detail below.
  • the cellular phone 10 can be operated in one of two modes: a standard mode as illustrated in FIGURE 3 and 4, and a reduced emission mode as shown in FIGURE 5.
  • the phone 10 is used in the standard mode if the user has no time or sufficient space to use the phone in the reduced exposure mode.
  • the user simply pivots the mouthpiece member 24 of the handset 14 about the hinge 26 into the unfolded position shown in FIGURES 3 and 4.
  • Contacts 40 on the handset 14 and corresponding contacts 42 on the base unit 12 form switches.
  • the contacts 40, 42 are engaged- (as they would be in standard mode use)
  • communication between the base unit 12 and the handset 14 occurs through direct transmission of electric signals via the contacts 40, 42 (as will be described in detail further below with respect to FIGURES 6 and 7).
  • the user holds the ohone 10 and uses it in substantially the same manner as any conventional cellular phone.
  • the user detaches the handset 14 from the base unit 12.
  • the base unit 12 is placed a distance away from the user to reduce his or her exposure to RF radiation emitted by the antenna 20.
  • the user communicates through the handset 14 as he would with any standard telephone handset.
  • a digital IR communications link is established to transmit signals between the handset 14 and the base unit 12 in the reduced exposure mode.
  • the contacts 40, 42 are disengaged, and communications between handset 14 and base unit 12 is switched to the digital IR communications link.
  • the link is established between the IR send/receive unit 38 on the handset 14 and the corresponding IR send/receive unit 36 on the base unit 12.
  • the handset infrared unit 38 comprises a pseudo-omnidirectional send and receive unit 44 positioned at the end of a telescopic device 46.
  • This telescopic device 46 is preferably located on the mouthpiece member 24 of the handset 14. Its location in the mouthpiece member 24 offers a greater chance of an unhindered line-of-sight communication link between the handset 14 and the base unit 12.
  • the infrared unit 38 can also instead be positioned on the earpiece member 22 of the handset 14 as indicated in phantom at 48 in FIGURE 5. In the reduced exposure mode, the base unit 12 of the phone 10 is separated from the user a distance sufficient to significantly reduce harmful exposure to RF radiation.
  • Radiation strength is inversely proportional to the square of the distance to the source (at least in first order approximation). Therefore, to reduce the radiation level by a factor of 1 000 (meaning the exposure would be 0.1 % of the original or that radiation would be reduced by 99.9%), the source would have to be moved a distance by a factor of about 32. Since most cellular phones are designed to have their antennas close (about 1 inch) to the user's head, reduction by 99.9% would require a separation distance of about 3 feet.
  • the infrared radiation emitted by the IR send/receive units 36, 38 on the handset 14 and the base unit 12 is not known to pose any health hazard.
  • the phone 10 is battery powered. As shown in FIGURES 2 and 4, the base unit 12 includes a rechargeable battery 49, and the handset 14 includes a rechargeable battery 51 .
  • the base unit 12 and the handset 14 also include contacts 53, 55 connected to their respective batteries 49, 51 . When the handset 14 and the base unit 12 are attached, the contacts 53, 55 are engaged, permitting both batteries 49, 51 to be simultaneously charged.
  • FIGURE 6 illustrates in general the functional blocks of a prior art digital cellular phone 100 as specified by the CTIA IS-54 standard.
  • the schematic diagram (from Digital Cellular Phone: A functional analysis by Raj Pawate and Mansoor Chishtie) provides background information for further understanding of the present invention.
  • a human voice input to a mouthpiece is converted to an analog electric signal by a microphone 102.
  • the signal is fed through an amplifier 104, after which it is converted to a digital bit stream in an analog to digital converter 106.
  • This bit stream is then fed through a speech encoder 108 and a channel encoder 1 10. It is then modulated at 1 12 and filtered for RF transmission from an antenna 1 14.
  • RF signals received from the antenna 1 14 are filtered, demodulated at 1 16, decoded by a channel decoder 1 18 and by a speech decoder 120, converted to an analog signal in a digital to analog converter 122, amplified at 124 and output as an audio signal from a speaker 126.
  • FIGURE 7 schematically illustrates the infrared communications link of the present invention.
  • the phone 10 of the present invention generally includes the functional components of the digital cellular phone 100 of FIGURE 6.
  • the phone 10 includes the components for establishing the IR communications link and switches for switching between the IR communications link (when the phone 10 is used in the reduced exposure mode) and the direct electric contact link (when the phone 10 is used in the standard mode).
  • additional switches 50 and IR send and IR receive units 52, 54 are located between a speech coder 56 and a channel coder 58 in the input path from the mouthpiece 30.
  • additional switches 60 and IR send and IR receive units 62, 64 are located between the speech decoder 66 and channel decoder 68 in the output path to the earpiece 28.
  • the IR send unit 52 and the IR receive unit 64 form the send/receive unit 38 on the handset 14.
  • the IR send unit 62 and the IR receive unit 54 form the send/receive unit 36 on the base unit 12.
  • the switches 50, 60 are connected to the electric contacts 40, 42 on the base unit 12 and the handset 14, and are designed to switch to the IR communications link when the contacts 40, 42 are disengaged.
  • the contacts 40, 42 are engaged, and communication between the handset 14 and the base unit 12 is switched to direct electrical contact through wires 70.
  • the switches 50, 60 are linked as indicated symbolically by dash line 72 to operate in concert, i.e., they switch between communication links simultaneously.
  • a human voice input to the mouthpiece 30 of the handset 14 is converted to an analog electric signal by the microphone 32.
  • the signal is fed through an amplifier 74, after which it is converted to a digital bit stream in an analog to digital converter 76.
  • This bit stream is then fed through the speech encoder 56 and thereafter converted to and transmitted as an IR signal by the IR send unit 52.
  • the signal is then remotely received by the IR receive unit 54 of the base unit 12. It is converted to an electric signal and fed to the channel encoder 58. It is then modulated and filtered for RF transmission through the antenna 20 (not shown in FIGURE 7) .
  • RF signals received from the antenna 20 of the base unit 12 are filtered, demodulated, and then decoded by the channel decoder 68.
  • the signal is then transmitted optically by the IR send unit 62. It is received remotely by the IR receive unit 64 on the handset 14 and fed through the speech decoder 66, converted to an analog signal in the digital to analog converter 78, amplified at 80 and output as an audio signal from the speaker 34. In this manner, the user is isolated from harmful radiation exposure to all portions of his or her body.
  • the phone 10 enables reduced radiation exposure, yet is fully portable and wireless. It is also easy to use and provides good sound quality

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Telephone Set Structure (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Téléphone cellulaire (10) conçu de manière à réduire l'exposition de l'utilisateur au rayonnement radioélectrique émis par l'antenne (20) d'un téléphone cellulaire. Ledit téléphone (10) comporte une base (12) et un combiné (14) connecté de manière amovible. La base (12) comporte une antenne (20) permettant d'établir une liaison de communication radioélectrique avec un réseau de communication sans fil. Elle comprend également un circuit destiné à convertir les signaux radioélectriques en signaux électriques et les signaux électriques en signaux radioélectriques. Le combiné (14) comporte un écouteur (28) et un micro (30) permettant à l'utilisateur de recevoir et de transmettre des signaux audio. Il comporte également un circuit destiné à convertir les signaux audio entrés en signaux électriques et les signaux électriques en signaux audio de sortie. Ledit téléphone peut être utilisé selon deux modes: un mode d'utilisation standard et un mode d'exposition réduite au rayonnement radioélectrique. Dans le mode d'utilisation standard, la base (12) et le combiné (14) sont attachés et utilisés en tant qu'une seule unité. Des contacts situés sur la base (12) s'emboîtent dans des contacts correspondants situés sur le combiné (14) pour permettre le transfert électrique direct de signaux entre la base et le combiné. Pour utiliser ledit téléphone en mode d'exposition réduite, il suffit de détacher le combiné de la base. La base est alors placée à une distance d'environ trois pieds de l'utilisateur et la communication entre la base et le combiné est établie par l'intermédiaire d'une liaison de communication optique par infrarouges.
PCT/US1999/005531 1999-03-12 1999-03-12 Telephone cellulaire a mode d'exposition reduite au rayonnement Ceased WO2000056051A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU30037/99A AU3003799A (en) 1999-03-12 1999-03-12 Cellular telephone with reduced radiation exposure
PCT/US1999/005531 WO2000056051A1 (fr) 1999-03-12 1999-03-12 Telephone cellulaire a mode d'exposition reduite au rayonnement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1999/005531 WO2000056051A1 (fr) 1999-03-12 1999-03-12 Telephone cellulaire a mode d'exposition reduite au rayonnement

Publications (1)

Publication Number Publication Date
WO2000056051A1 true WO2000056051A1 (fr) 2000-09-21

Family

ID=22272348

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1999/005531 Ceased WO2000056051A1 (fr) 1999-03-12 1999-03-12 Telephone cellulaire a mode d'exposition reduite au rayonnement

Country Status (2)

Country Link
AU (1) AU3003799A (fr)
WO (1) WO2000056051A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002056572A1 (fr) * 2001-01-09 2002-07-18 Sital Technology And Hardwear Development (1997) Ltd. Unite de combinaison telephone cellulaire combine telephonique
WO2002067553A1 (fr) * 2001-02-20 2002-08-29 Donato Trivigno Telephone mobile a combine separable
WO2004025939A1 (fr) * 2002-09-09 2004-03-25 Vertu Ltd Radiotelephone cellulaire
WO2004025938A1 (fr) * 2002-09-09 2004-03-25 Vertu Ltd Radiotelephone cellulaire
FR2865093A1 (fr) * 2004-01-13 2005-07-15 Sagem Telephone mobile du type a deux modules distincts
DE102006044827B4 (de) * 2005-10-11 2010-05-12 Mediatek Inc. Telekommunikationssystem
WO2011148360A3 (fr) * 2011-07-28 2012-09-13 Naim Sungur Nouveau téléphone mobile cellulaire qui minimise les effets négatifs sur la santé humaine par éloignement des parties émettant des ondes électromagnétiques haute fréquence et haute puissance potentiellement dangereuses de l'utilisateur
WO2020015833A1 (fr) 2018-07-19 2020-01-23 Abderhamane Ahmad Terminal mobile et réseau cellulaire a antennes et pseudo-satellites photoniques pour augmenter les vitesses de transferts et réduire les risques de maladies du cerveau et la pollution electromagnetique de rf

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4456793A (en) * 1982-06-09 1984-06-26 Bell Telephone Laboratories, Incorporated Cordless telephone system
US4775996A (en) * 1987-09-30 1988-10-04 Northern Telecom Limited Hybrid telephony communication system
US4776000A (en) * 1986-01-28 1988-10-04 Raoul Parienti Telephone communications system with portable handsets
US4882745A (en) * 1987-05-08 1989-11-21 Silver Alan H Cordless headset telephone

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4456793A (en) * 1982-06-09 1984-06-26 Bell Telephone Laboratories, Incorporated Cordless telephone system
US4776000A (en) * 1986-01-28 1988-10-04 Raoul Parienti Telephone communications system with portable handsets
US4882745A (en) * 1987-05-08 1989-11-21 Silver Alan H Cordless headset telephone
US4775996A (en) * 1987-09-30 1988-10-04 Northern Telecom Limited Hybrid telephony communication system

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002056572A1 (fr) * 2001-01-09 2002-07-18 Sital Technology And Hardwear Development (1997) Ltd. Unite de combinaison telephone cellulaire combine telephonique
WO2002067553A1 (fr) * 2001-02-20 2002-08-29 Donato Trivigno Telephone mobile a combine separable
WO2004025939A1 (fr) * 2002-09-09 2004-03-25 Vertu Ltd Radiotelephone cellulaire
WO2004025938A1 (fr) * 2002-09-09 2004-03-25 Vertu Ltd Radiotelephone cellulaire
US7031761B2 (en) 2002-09-09 2006-04-18 Vertu Limited Cellular radio telephone
FR2865093A1 (fr) * 2004-01-13 2005-07-15 Sagem Telephone mobile du type a deux modules distincts
EP1555794A1 (fr) * 2004-01-13 2005-07-20 Sagem S.A. Téléphone mobile du type à deux modules distincts
DE102006044827B4 (de) * 2005-10-11 2010-05-12 Mediatek Inc. Telekommunikationssystem
WO2011148360A3 (fr) * 2011-07-28 2012-09-13 Naim Sungur Nouveau téléphone mobile cellulaire qui minimise les effets négatifs sur la santé humaine par éloignement des parties émettant des ondes électromagnétiques haute fréquence et haute puissance potentiellement dangereuses de l'utilisateur
WO2020015833A1 (fr) 2018-07-19 2020-01-23 Abderhamane Ahmad Terminal mobile et réseau cellulaire a antennes et pseudo-satellites photoniques pour augmenter les vitesses de transferts et réduire les risques de maladies du cerveau et la pollution electromagnetique de rf

Also Published As

Publication number Publication date
AU3003799A (en) 2000-10-04

Similar Documents

Publication Publication Date Title
US5113428A (en) Cordless telephone headset
FI108766B (fi) Käsimatkaviestin
RU2120192C1 (ru) Сотовый громкоговорящий телефонный аппарат и способ его функционирования
US11405757B2 (en) Integrated telecommunications handset
US20050164636A1 (en) Inductive communication system and method
JPH07226807A (ja) 赤外線ポート付電池パックを備えた無線式送受話器
US20100151911A1 (en) Integrated telecommunications handset
JPH08140129A (ja) 携帯電話機
US20020090919A1 (en) Adapter to convert cell phone to desktop telephone
US11963069B2 (en) Integrated telecommunications handset
WO2000056051A1 (fr) Telephone cellulaire a mode d'exposition reduite au rayonnement
US20030186727A1 (en) Cellular communication handset device
CN1579082B (zh) 大大减少用户大脑所受微波辐射的蜂窝电话系统
JPH1174951A (ja) 無線式携帯電話機に接続する子機
JPH03198436A (ja) 無線電話装置
CN202445285U (zh) 伞装置
KR20000018393U (ko) 안테나가 내장된 목걸이줄을 구비한 휴대폰
JP2003152844A (ja) 携帯通信端末装置
CN1231570A (zh) 便携的移动通信终端装置
JP2520607Y2 (ja) 携帯用無線電話機
JPH0440046A (ja) ペンシル型携帯用無線電話機
JP3008497B2 (ja) 無線電話装置
JPH10308701A (ja) 無線通信装置
KR200258285Y1 (ko) 음성스위치를 구비한 영상휴대폰과 한 조가 된 운전대부착 장치
JP2004328251A (ja) 携帯電話装置

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GD GE GH GM HR HU ID IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG UZ VN YU ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase