WO2002032204A1 - Emi/rfi shielding device for electronic products - Google Patents

Emi/rfi shielding device for electronic products Download PDF

Info

Publication number
WO2002032204A1
WO2002032204A1 PCT/US2000/032015 US0032015W WO0232204A1 WO 2002032204 A1 WO2002032204 A1 WO 2002032204A1 US 0032015 W US0032015 W US 0032015W WO 0232204 A1 WO0232204 A1 WO 0232204A1
Authority
WO
WIPO (PCT)
Prior art keywords
emi
shielding cover
electronic device
rfi shielding
rfi
Prior art date
Application number
PCT/US2000/032015
Other languages
French (fr)
Inventor
Terry Imagawa
Kevin Chung
Sandra Chung
Original Assignee
Terry Imagawa
Kevin Chung
Sandra Chung
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 Terry Imagawa, Kevin Chung, Sandra Chung filed Critical Terry Imagawa
Priority to AU2001217873A priority Critical patent/AU2001217873A1/en
Publication of WO2002032204A1 publication Critical patent/WO2002032204A1/en

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

Definitions

  • the invention relates in general to a shielding device with electromagnetic interference / radio frequency interference (EMI/RFI) properties. More particularly, this invention relates to a shielding device that prevents a direct exposure of a human body to an electromagnetic field emanating from a wireless product.
  • EMI/RFI electromagnetic interference / radio frequency interference
  • the radio frequency is transmitted / received (transceived) via the antenna only.
  • the current techniques cannot provide or fabricate a wireless product that transceives a signal without leaking the radiation from the body. That is, when the antenna of a wireless product is transmitting or receiving a radio frequency, the body of the wireless product is inevitably to leak radiation.
  • the invention provides an EMI/RFI shielding device that prevents the radiation emanating from both the antenna and the body of an electronic device. Being deflected or absorbed by the shielding device, the radiation leaking from the body of the electronic device is transferred into heat or other form to be dissipated. In addition, the radiation emanating from the antenna of the electronic device is interfered or blocked by the shielding device to prevent a direct exposure of the radiation to the human body.
  • the EMI/RFI shielding device comprises a first portion that wraps a body of the electronic device to prevent from establishing a direct contact, or a direct exposure of the radiation leaking from the body of the electronic device to a human body.
  • the EMI/RFI shielding device comprises a foldable second portion extending from the first portion.
  • the second portion can be folded to cover the keyboard and the display of the electronic device, so that the radiation leakage from the keyboard or the display is blocked from propagating to the human body.
  • the EMI/RFI shielding device further comprises a third portion that extends from the first and second portions to block the radiation emanating from the antenna.
  • Figure 1 shows a front view of an EMI/RFI shielding device for electronic device according to the invention.
  • Figures 2 shows a rear view of the EMI/RFI shielding cover as shown in Figure 1.
  • the electronic devices especially those wireless products such as cellular phones, personal digital assistants, pagers, hand held devices and laptop computers have a great demand in signal transmitting and receiving quality. Therefore, to provide a good communication between the electronic devices, the signal transmission tower, or the gateway infrastructure arrangement, the electromagnetic field and microwave radiation generated by the transmission signal is harmful to human body.
  • the radiation is typically transmitted or received from an antenna of the electronic device. Therefore, by disposing the antenna to a proximity of a human body can cause serious harm to the human body or the user. In addition to radiation emanating from the antenna, it is inevitably that the body of the electronic device also has leakage of radiation.
  • the invention provides an EMI/RFI shielding cover that can protect the user from being hurt from the radiation with a frequency from about 700 MHz to about 100 GHz emanating from everywhere of the electronic device.
  • an EMI/RFI shielding cover for a cellular phone is illustrated in Figure 1 and Figure 2 as an example. It is appreciated that the shape of the EMI/RFI shielding depends on the exact shape of the electronic device that includes a wireless product such as a cellular phone, a Personal digital assistant, a pager, a hand held device and a laptop computer.
  • an EMI/RFI shielding device for a cellular phone.
  • the EMI/RFI shielding device comprises a body shielding cover 101 to wrap the body of the cellular phone, so that a direct contact between the body of the cellular phone is avoided.
  • the material of the body shielding cover 101 comprises conductive polymer that deflects and absorbed the radiation emanating from the body of the cellular phone. Being deflected, the radiation is thus diverted into another direction without propagating towards to the human body. Being absorbed by the body shielding cover 101, the radiation is converted into heat to be dissipated away.
  • the shielding cover 101 comprises a transparent portion 101a on the display and the keyboard to enable the user to dial the number or to read the message from the display easily.
  • the material of the transparent portion 101a also has the properties to deflect or absorb the radiation emanating from the body of the cellular phone.
  • a key board and display shield 102 extends from a rear side of
  • the key board and display shield 102 is foldable or removable to completely cover the key board and the display.
  • the key board and display shield 102 can be folded to cover the key board and
  • the radiation emanating from the key board and the display can also be effected blocked
  • the shielding device further comprises an antenna shield 103 extending from the
  • the body shielding cover 101 from a side of the earpiece.
  • the antenna shield 103 is
  • the materials of the key board and display shield 102 and the antenna shield 103 are the same.
  • antenna of an electronic device can be blocked, deflected from a human body, but also the radiation
  • leaking from a body of the electronic device can be deflected or absorbed without causing any health

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

A body shielding cover (101) includes a transparent portion (101A), a display shield (102) and an antenna shield (103).

Description

EMI/RFI SHIELDING DEVICE FOR ELECTRONIC PRODUCTS BACKGROUND OF THE INVENTION Field of the Invention The invention relates in general to a shielding device with electromagnetic interference / radio frequency interference (EMI/RFI) properties. More particularly, this invention relates to a shielding device that prevents a direct exposure of a human body to an electromagnetic field emanating from a wireless product. Description of the Related Art As the wireless products such as cellular phones, personal digital assistants, pagers, hand held devices and laptop computers become more and more commonly used, there is a great demand in quality of signal transmitting and receiving. To establish a well communication for these kinds of wireless products, a clear and continuous signal in a form of strong radiation is required. Ideally, taking the cellular phones as an example, when a signal is received or transmitted, the radio frequency is transmitted / received (transceived) via the antenna only. However, the current techniques cannot provide or fabricate a wireless product that transceives a signal without leaking the radiation from the body. That is, when the antenna of a wireless product is transmitting or receiving a radio frequency, the body of the wireless product is inevitably to leak radiation.
This kind of radiation is harmful to human body especially when the wireless product is close to the human body. Among these wireless products, the cellular phone is often held next to the human brain while being used. The leakage of radiation from the body of the cellular phone thus seriously endangers the healthy of the users. In addition to the body of the cellular phone, products such as the laptop computer or other device may also leak the radiation through the keyboard, monitor, windows, buttons, connectors and wire attachments such as hands free kits.
A great concern in eliminating the radiation damage to human body has been evoked in recent years. Accessories for cellular telephones or higher frequency band transceivers that provide some protection to the users have been developed recently. However, for a closed-form design, only the radiation emanating from a portion of the electronic equipment can be shielded. Furthermore, it is difficult to shield the radiation without degrading the signal transmission or receiving quality.
SUMMARY OF THE INVENTION The invention provides an EMI/RFI shielding device that prevents the radiation emanating from both the antenna and the body of an electronic device. Being deflected or absorbed by the shielding device, the radiation leaking from the body of the electronic device is transferred into heat or other form to be dissipated. In addition, the radiation emanating from the antenna of the electronic device is interfered or blocked by the shielding device to prevent a direct exposure of the radiation to the human body. The EMI/RFI shielding device comprises a first portion that wraps a body of the electronic device to prevent from establishing a direct contact, or a direct exposure of the radiation leaking from the body of the electronic device to a human body. The EMI/RFI shielding device comprises a foldable second portion extending from the first portion. The second portion can be folded to cover the keyboard and the display of the electronic device, so that the radiation leakage from the keyboard or the display is blocked from propagating to the human body. The EMI/RFI shielding device further comprises a third portion that extends from the first and second portions to block the radiation emanating from the antenna. Thus constructed, the radiation emanating from the antenna and the radiation leaking from the body of electronic device can be blocked, and a direct exposure of this kind of harmful radiation to the human body is prevented.
Both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 shows a front view of an EMI/RFI shielding device for electronic device according to the invention; and
Figures 2 shows a rear view of the EMI/RFI shielding cover as shown in Figure 1.
DESCRIPTION OF THE PREFERRED EMBODIMENTS As mention above, the electronic devices, especially those wireless products such as cellular phones, personal digital assistants, pagers, hand held devices and laptop computers have a great demand in signal transmitting and receiving quality. Therefore, to provide a good communication between the electronic devices, the signal transmission tower, or the gateway infrastructure arrangement, the electromagnetic field and microwave radiation generated by the transmission signal is harmful to human body. The radiation is typically transmitted or received from an antenna of the electronic device. Therefore, by disposing the antenna to a proximity of a human body can cause serious harm to the human body or the user. In addition to radiation emanating from the antenna, it is inevitably that the body of the electronic device also has leakage of radiation. For example, when a user is holding a hand set on his/her hand and disposing the ear piece near his/her ear, there is always some radiation emanating from the ear piece or the hand set to harm the user. Therefore, the invention provides an EMI/RFI shielding cover that can protect the user from being hurt from the radiation with a frequency from about 700 MHz to about 100 GHz emanating from everywhere of the electronic device.
In this embodiment, an EMI/RFI shielding cover for a cellular phone is illustrated in Figure 1 and Figure 2 as an example. It is appreciated that the shape of the EMI/RFI shielding depends on the exact shape of the electronic device that includes a wireless product such as a cellular phone, a Personal digital assistant, a pager, a hand held device and a laptop computer.
As shown in Figure 1, an EMI/RFI shielding device is provided for a cellular phone. The EMI/RFI shielding device comprises a body shielding cover 101 to wrap the body of the cellular phone, so that a direct contact between the body of the cellular phone is avoided. The material of the body shielding cover 101 comprises conductive polymer that deflects and absorbed the radiation emanating from the body of the cellular phone. Being deflected, the radiation is thus diverted into another direction without propagating towards to the human body. Being absorbed by the body shielding cover 101, the radiation is converted into heat to be dissipated away. The shielding cover 101 comprises a transparent portion 101a on the display and the keyboard to enable the user to dial the number or to read the message from the display easily. Ideally, the material of the transparent portion 101a also has the properties to deflect or absorb the radiation emanating from the body of the cellular phone. In addition to the shielding cover 101 that wraps the body of the cellular phone, a key board and display shield 102 extends from a rear side of
the body shielding cover 101. The key board and display shield 102 is foldable or removable to completely cover the key board and the display. When the protection provided by the transparent part 101a of the body shielding cover 101 is not sufficient to protect the user, after reading the message or dialing, the key board and display shield 102 can be folded to cover the key board and
the display. As a result, even the transparent part does not have enough protection from the
radiation, the radiation emanating from the key board and the display can also be effected blocked
by the key board display shield 102.
In Figure 1 , the shielding device further comprises an antenna shield 103 extending from the
body shielding cover 101 from a side of the earpiece. Referring to Figure 2, the antenna shield 103
covers a range that the radiation emanating from the antenna 104 may directly propagate towards the
human body. Being blocked by the antenna shield 103, all the radiation emanating from the antenna
104 is deflected away.
The materials of the key board and display shield 102 and the antenna shield 103 are the same
as that of the body shielding cover 101. Thus constructed, not only the radiation emanating from the
antenna of an electronic device can be blocked, deflected from a human body, but also the radiation
leaking from a body of the electronic device can be deflected or absorbed without causing any health
concern for the human body.
Other embodiments of the invention will appear to those skilled in the art from consideration
of the specification and practice of the invention disclosed herein. It is intended that the
specification and examples to be considered as exemplary only, with a true scope and spirit of the
invention being indicated by the following claims.

Claims

WHAT IS CLAIMED IS:
1. An EMI/RFI shielding device, comprising: a body shielding cover, to wrap a body of an electronic device that comprises an antenna; a foldable key board and display shield, extending from the body shielding cover at a side of the electronic device; and an antenna shield, extending from the body shielding cover to have a coverage larger than the antenna.
2. The EMI/RFI shielding cover according to claim 1 , wherein the EMI/RFI shielding device is formed by a conductive polymer material.
3. The EMI/RFI shielding cover according to claim 1 , wherein the EMI/RFI shielding device is formed by a conductive material.
4. The EMI/RFI shielding cover according to claim 1 , wherein the EMI/RFI shielding device is formed by a metalized material.
5. The EMI/RFI shielding cover according to claim 1, wherein the body shielding cover wraps the electronic device in a way that a direct exposure of a radiation emanating from the body of the electronic device to a user is prevented.
6. The EMI/RFI shielding cover according to claim 1, wherein the body shielding cover further comprises a transparent part covering a display and a key board of the electronic device.
7. The EMI/RFI shielding cover according to claim 1, wherein the foldable key board and display shield is folded to cover a key board and a display of the electronic device.
8. The EMI/RFI shielding cover according to claim 1, wherein the antenna shield is large enough to prevent a direct exposure of the radiation emanating from the antenna to a user.
9. The EMI/RFI shielding cover according to claim 1, wherein the electronic device comprises a wireless product that receive and transmit a radio signal from a signal transmission tower.
10 The EMI/RFI shielding cover according to claim 1, wherein the electronic device comprises at least one of the following wireless products including a cellular phone, a personal digital assistant, a pager, a hand held device and a laptop computer.
11 The EMI/RFI shielding cover according to claim 1, wherein the electronic device transmits and receives a signal with a frequency from about 700 MHz to about 100 GHz.
12. An EMI/RFI shielding device, comprising: a body shielding cover, to prevent a direct contact and exposure of a radiation emanating from a body of an electronic device to a human body; a key board and a display shield, to prevent a direct exposure of a radiation emanating from a key board and a display of the electronic device to the human body; and an antenna shield, to prevent a direct exposure of a radiation emanating from an antenna of the electronic device to the human body.
5
13. The EMI/RFI shielding device according to claim 12, wherein the body shielding further comprises a transparent part on the key board and the display.
14. The EMI/RFI shielding device according to claim 13, wherein the key board and display L 0 shield extends from a side of the body shielding cover and is foldable to cover the transparent part.
15. The EMI/RFI shielding device according to claim 12, wherein body shielding cover, the key board and display shield, and the antenna shield are formed of a conductive polymer material.
5 16. The EMI/RFI shielding device according to claim 12, wherein body shielding cover, the key board and display shield, and the antenna shield are formed of a conductive material.
17. The EMI/RFI shielding device according to claim 12, wherein body shielding cover, the key board and display shield, and the antenna shield are formed of a metalized material. 0
18. The EMI/RFI shielding device according to claim 12, wherein the radiation emanating from the body of the electronic device is transferred into heat after being deflected or absorbed by the body shielding cover.
19. The EMI/RFI shielding device according to claim 12, wherein the antenna shield extends from a side of the body shielding cover to block the radiation emanating from the antenna.
5
20. The EMI/RFI shielding cover according to claim 12, wherein the electronic device comprises a wireless product that receive and transmit a radio signal from a signal transmission tower.
0 21. The EMI/RFI shielding cover according to claim 12, wherein the electronic device comprises a wireless product that receive and transmit a radio signal from a gateway infrastructure arrangement.
22. The EMI/RFI shielding cover according to claim 12, wherein the electronic device [5 comprises at least one of the following wireless products including a cellular phone, a Personal digital assistant, a pager, a hand held device and a laptop computer.
23. The EMI/RFI shielding cover according to claim 12, wherein the electronic device transmits and receives a signal with a frequency from about 700 MHz to about 100 GHz. 0
PCT/US2000/032015 2000-10-10 2000-11-21 Emi/rfi shielding device for electronic products WO2002032204A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001217873A AU2001217873A1 (en) 2000-10-10 2000-11-21 Emi/rfi shielding device for electronic products

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US68519400A 2000-10-10 2000-10-10
US09/685,194 2000-10-10

Publications (1)

Publication Number Publication Date
WO2002032204A1 true WO2002032204A1 (en) 2002-04-18

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ID=24751127

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/032015 WO2002032204A1 (en) 2000-10-10 2000-11-21 Emi/rfi shielding device for electronic products

Country Status (2)

Country Link
AU (1) AU2001217873A1 (en)
WO (1) WO2002032204A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005025080A1 (en) * 2003-08-29 2005-03-17 Siemens Aktiengesellschaft Mobile communication appliance
EP1555762A1 (en) * 2004-01-19 2005-07-20 Boulnois, Edith Maria Box, especially in plastic for containing a base station for a mobile phone
GB2464459A (en) * 2008-10-14 2010-04-21 Max Fairclough Radiation-absorbing shield for a mobile telephone

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5726383A (en) * 1996-04-29 1998-03-10 Geller; Uri Telephone radiation shield

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5726383A (en) * 1996-04-29 1998-03-10 Geller; Uri Telephone radiation shield

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005025080A1 (en) * 2003-08-29 2005-03-17 Siemens Aktiengesellschaft Mobile communication appliance
EP1555762A1 (en) * 2004-01-19 2005-07-20 Boulnois, Edith Maria Box, especially in plastic for containing a base station for a mobile phone
GB2464459A (en) * 2008-10-14 2010-04-21 Max Fairclough Radiation-absorbing shield for a mobile telephone
GB2464459B (en) * 2008-10-14 2010-08-25 Max Fairclough A lead radiation absorbing directional shield for mobile phone users

Also Published As

Publication number Publication date
AU2001217873A1 (en) 2002-04-22

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