WO2002089550A1 - Apparatus for absorbing electromagnetic wave - Google Patents
Apparatus for absorbing electromagnetic wave Download PDFInfo
- Publication number
- WO2002089550A1 WO2002089550A1 PCT/KR2001/001066 KR0101066W WO02089550A1 WO 2002089550 A1 WO2002089550 A1 WO 2002089550A1 KR 0101066 W KR0101066 W KR 0101066W WO 02089550 A1 WO02089550 A1 WO 02089550A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- electromagnetic wave
- offsetting
- weight
- absorbing
- unit
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0094—Shielding materials being light-transmitting, e.g. transparent, translucent
- H05K9/0096—Shielding materials being light-transmitting, e.g. transparent, translucent for television displays, e.g. plasma display panel
Definitions
- the present invention relates to an apparatus for absorbing an
- an electromagnetic wave is generated when an electric
- the electromagnetic wave is tightly restricted in most countries.
- the electromagnetic wave is tightly restricted in most countries.
- the conventional apparatus for preventing an electromagnetic wave which
- a monitor which includes a horizontal driving circuit and high voltage generation
- unit 30 for applying a high voltage to an anode and grid of a Brown tube of a
- the above-described application includes a detection unit 10 for
- the electromagnetic wave leakage prevention circuit includes
- a zenor diode Zvi and a transistor Q1 which are turned on when the set voltage
- electromagnetic wave prevention apparatus is not installed in the inside and
- offsetting unit formed of Mn-Zn group ferrite and installed in a portion
- a power unit for supplying a direct current to the first and second
- Figure 1 is a circuit diagram illustrating the construction of a conventional
- Figure 2 is a block diagram illustrating an apparatus for absorbing an
- Figure 3 is a block diagram illustrating the construction of an apparatus for
- Figure 2 is a block diagram illustrating an apparatus for absorbing an
- the electronic display apparatus is gathered in the second electromagnetic
- offsetting unit 12b based on a current flow formed in the electromagnetic wave
- the first and second electromagnetic wave offsetting units are formed of
- ferrite including Mn and Zn for thereby absorbing the electromagnetic wave.
- Mn-Zn group ferrite which includes 1.8-2.0 weight % of Y 2 0 3 ,
- Figure 3 is a perspective view illustrating an installation state of the
- displaying a certain information includes a portion A in which a certain information
- the electromagnetic wave absorbing apparatus according to the present
- angled first electromagnetic offsetting unit 12a corresponds to the 90° angled
- a positive voltage is applied to the first electromagnetic wave offsetting
- the applied voltage is a direct current voltage having a range of
- the electromagnetic wave absorbing apparatus detachable electromagnetic wave absorbing apparatus.
- the electronic display apparatus at a fabrication stage.
- the power provided in the electronic apparatus is used.
- the electromagnetic wave absorbing apparatus according to the present
- invention is adapted to all kinds of display units such as television monitor,
- second electromagnetic wave offsetting units are installed in a diagonal direction.
- the direction of the installation is not limited thereto.
- the first and second electromagnetic wave offsetting units may be
- electronic display apparatus and may be installed to correspond with the left and
- electromagnetic wave offsetting units may be installed in a semi-circle shape for
- the electromagnetic wave absorbing apparatus As described above, the electromagnetic wave absorbing apparatus
- present invention is detachably installed in a front portion of the electronic display
- a certain material having an electromagnetic wave absorbing characteristic is adapted for thereby absorbing an electromagnetic wave using a
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Plasma & Fusion (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Aerials With Secondary Devices (AREA)
Abstract
An apparatus for absorbing an electromagnetic wave which is capable of offsetting an electromagnetic wave of an electronic display apparatus is disclosed. The apparatus for absorbing an electromagnetic wave according to the present invention includes a first electromagnetic wave offsetting unit formed of Mn-Zn group ferrite and installed in a portion corresponding to a screen in which a certain information is displayed, a second electromagnetic wave offsetting unit formed of Mn-Zn group ferrite and installed in a potion corresponding to the first electromagnetic wave offsetting unit, and a power unit for supplying a direct current to the first and second electromagnetic wave offsetting units, whereby an electromagnetic wave from the electronic apparatus is absorbed by an electromagnetic offsetting unit among the first and second electromagnetic wave offsetting units to which a negative voltage is supplied.
Description
APPARATUS FOR ABSORBING ELECTROMAGNETIC WAVE
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an apparatus for absorbing an
electromagnetic wave, and in particular to an apparatus for absorbing an
electromagnetic wave which is capable of effectively preventing an
electromagnetic wave by offsetting the electromagnetic wave generated in an
electronic display apparatus.
2. Description of the Background Art
Generally, an electromagnetic wave is generated when an electric
apparatus or electronic apparatus is operated. The thusly generated
electromagnetic wave is known to cause a cancer or sterility. Therefore, the
electromagnetic wave is tightly restricted in most countries. The electromagnetic
wave is restricted on the standards of EMC and EMI which regulate a generation
in other apparatuses, EMS which regulates effects due to an electromagnetic
wave introduced from other apparatuses, and TCO of Sweden.
The conventional apparatus for preventing an electromagnetic wave which
causes a harmful effect to a human life will be explained.
As disclosed in Korean Patent Application No. 96-13510, an
electromagnetic wave detection and prevention apparatus of a monitor is installed
in a monitor which includes a horizontal driving circuit and high voltage generation
unit 30 for applying a high voltage to an anode and grid of a Brown tube of a
monitor.
Namely, the above-described application includes a detection unit 10 for
detecting an electromagnetic field strength of a harmful electromagnetic wave
generated in a monitor, and an electromagnetic wave leakage prevention circuit 20
operated when an electromagnetic field strength detected by the detection unit 10
exceeds a certain set value.
Here, when the electromagnetic wave leakage prevention circuit includes
a zenor diode Zvi and a transistor Q1 which are turned on when the set voltage
exceeds a reference voltage.
In the conventional electromagnetic wave leakage prevention circuit, it is
impossible to prevent an electromagnetic wave generated below an
electromagnetic field strength detected by the detection unit. In addition, it is
impossible to offset the generation of an electromagnetic wave of an electronic
apparatus in which an electromagnetic wave prevention apparatus is not installed.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide an apparatus
for absorbing an electromagnetic wave which is capable of offsetting an
electromagnetic wave of an electronic display apparatus.
It is another object of the present invention to provide an apparatus for
absorbing an electromagnetic wave of an electronic apparatus in the case that an
electromagnetic wave prevention apparatus is not installed in the inside and
outside of the apparatus.
In order to achieve the above object, there is provided an apparatus for
absorbing an electromagnetic wave which includes a first electromagnetic wave
offsetting unit formed of Mn-Zn group ferrite and installed in a portion
corresponding to a screen in which a certain information is displayed;
a second electromagnetic wave offsetting unit formed of Mn-Zn group
ferrite and installed in a potion corresponding to the first electromagnetic wave
offsetting unit; and
a power unit for supplying a direct current to the first and second
electromagnetic wave offsetting units,
whereby an electromagnetic wave from the electronic apparatus is
absorbed by an electromagnetic offsetting unit among the first and second
electromagnetic wave offsetting units to which a negative voltage is supplied.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will become better understood with reference to the
accompanying drawings which are given only by way of illustration and thus are
not limitative of the present invention, wherein;
Figure 1 is a circuit diagram illustrating the construction of a conventional
electromagnetic wave prevention apparatus;
Figure 2 is a block diagram illustrating an apparatus for absorbing an
electromagnetic wave according to the present invention; and
Figure 3 is a block diagram illustrating the construction of an apparatus for
absorbing an electromagnetic wave according to the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The embodiments of the present invention will be explained with reference
to the accompanying drawings.
Figure 2 is a block diagram illustrating an apparatus for absorbing an
electromagnetic wave according to the present invention which includes an
electronic display apparatus 10 for displaying a certain information on a screen,
and a first electromagnetic wave offsetting unit 12a and a second electromagnetic
wave offsetting unit 12b installed in the electronic display apparatus 10 for
offsetting the electromagnetic wave generated therein.
The operation of the apparatus for absorbing an electromagnetic wave
according to the present invention will be explained with reference to the
accompanying drawings.
A positive voltage is applied to the first electromagnetic wave offsetting
unit 12a, and a negative voltage is applied to the second electromagnetic wave
offsetting unit 12b. In addition, a certain amount of current is generated
therebetween.
Therefore, the electromagnetic wave generated from the front portion of
the electronic display apparatus is gathered in the second electromagnetic
offsetting unit 12b based on a current flow formed in the electromagnetic wave
absorbing apparatus. The electromagnetic wave of the electronic display
apparatus has a curved shape because the electromagnetic field is weak and is
easily absorbed by the current flow due to the voltage applied to the first and
second electromagnetic wave offsetting units.
The first and second electromagnetic wave offsetting units are formed of
ferrite including Mn and Zn for thereby absorbing the electromagnetic wave.
The component of the first and second electromagnetic wave offsetting
units are formed of a Mn-Zn group ferrite which includes 1.8-2.0 weight % of Y203,
0.04-0.09 weight % of K2O, 0.02-0.09 weight % of TIO2, 0.29-0.38 weight % of
NaO2, 14.0-15.0 weight % of MnO2, 15.0-16.5 weight % of ZnO, 65.0-75.0
weight % of Fe2O3, 0.05-0.09 weight % of CaO, 0.60-0.85 weight % of SiO2,
0.01 -0.03 weight % of NiO, and 0.01 -0.05 weight % of CrO3.
The detailed operation of the apparatus for absorbing an electromagnetic
wave which is adapted to an electronic display apparatus will be explained.
Figure 3 is a perspective view illustrating an installation state of the
electromagnetic wave absorbing apparatus according to the present invention. As
shown therein, the front surface of the electronic display apparatus 10 for
displaying a certain information includes a portion A in which a certain information
is actually displayed, and a portion B in which an information is not displayed. The
electromagnetic wave absorbing apparatus according to the present invention is
installed in the portion B using a certain attaching member such as a double-side
tape.
The electromagnetic wave absorbing apparatus according to the present
invention in a corner of the portion B is installed in such a manner that the 90°
angled first electromagnetic offsetting unit 12a corresponds to the 90° angled
second electromagnetic offsetting unit 12b for thereby maximizing an
electromagnetic wave offsetting effect.
A positive voltage is applied to the first electromagnetic wave offsetting
unit 12a, and a negative voltage is applied to the second electromagnetic wave
offsetting unit 12b. The applied voltage is a direct current voltage having a range of
9V-12V.
The above-described embodiment of the present invention is directed to a
detachable electromagnetic wave absorbing apparatus. The electromagnetic wave
absorbing apparatus according to the present invention is integrally installed to the
electronic display apparatus at a fabrication stage. In this case, the power
provided in the electronic apparatus is used.
The electromagnetic wave absorbing apparatus according to the present
invention is adapted to all kinds of display units such as television monitor,
computer monitor, and various monitors which use a Brown tube.
In the above-described embodiment of the present invention, the first and
second electromagnetic wave offsetting units are installed in a diagonal direction.
The direction of the installation is not limited thereto.
The first and second electromagnetic wave offsetting units may be
installed to correspond with the upper and lower portions of the front portion of the
electronic display apparatus and may be installed to correspond with the left and
right portions of the front portion of the same. In addition, the first and second
electromagnetic wave offsetting units may be installed in a semi-circle shape for
thereby forming two separated semi-circle shapes surrounding the screen, namely,
the Brown tube.
As described above, the electromagnetic wave absorbing apparatus
according to the present invention has the following advantages.
First, the electromagnetic wave absorbing apparatus according to the
present invention is detachably installed in a front portion of the electronic display
apparatus which does not include an electromagnetic wave absorbing apparatus is
not installed for thereby implementing an easier use of the apparatus.
Second, a certain material having an electromagnetic wave absorbing
characteristic is adapted for thereby absorbing an electromagnetic wave using a
certain current for thereby increasing a capability for preventing an
electromagnetic wave.
Third, when adapting the electromagnetic wave absorbing apparatus
according to the present invention, an additional electromagnetic prevention circuit
is not used, so that it is possible to decrease a fabrication cost of the apparatus.
As the present invention may be embodied in several forms without
departing from the spirit or essential characteristics thereof, it should also be
understood that the above-described embodiments are not limited by any of the
details of the foregoing description, unless otherwise specified, but rather should
be construed broadly within its spirit and scope as defined in the appended
claims, and therefore all changes and modifications that fall within the meets
and bounds of the claims, or equivalences of such meets and bounds are
therefore intended to be embraced by the appended claims.
Claims
What is claimed is:
1. In an electromagnetic wave absorbing apparatus installed in a front portion
of an electronic display unit, an apparatus for absorbing an electromagnetic wave,
comprising:
a first electromagnetic wave offsetting unit formed of Mn-Zn group ferrite
and installed in a portion corresponding to a screen in which a certain information
is displayed;
a second electromagnetic wave offsetting unit formed of Mn-Zn group
ferrite and installed in a potion corresponding to the first electromagnetic wave
offsetting unit; and
a power unit for supplying a direct current to the first and second
electromagnetic wave offsetting units,
whereby an electromagnetic wave from the electronic apparatus is
absorbed by an electromagnetic offsetting unit among the first and second
electromagnetic wave offsetting units to which a negative voltage is supplied.
2. The apparatus of claim 1 , wherein said first and second electromagnetic
wave offsetting units are formed of:
1.8-2.0 weight % of Y2O3, 0.04-0.09 weight % of K2O, 0.02-0.09
weight % of TI02, 0.29-0.38 weight % of NaO2, 14.0-15.0 weight % of MnO2,
15.0-16.5 weight % of ZnO, 65.0-75.0 weight % of Fe2O3, 0.05-0.09 weight % of
CaO, 0.60-0.85 weight % of SiO2, 0.01-0.03 weight % of NiO, and 0.01-0.05
weight % of CrO3.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020010023216A KR20020053692A (en) | 2001-04-28 | 2001-04-28 | Electromagnetic wave absorption device |
| KR2001/23216 | 2001-04-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2002089550A1 true WO2002089550A1 (en) | 2002-11-07 |
Family
ID=19708859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2001/001066 WO2002089550A1 (en) | 2001-04-28 | 2001-06-22 | Apparatus for absorbing electromagnetic wave |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR20020053692A (en) |
| WO (1) | WO2002089550A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0342971A2 (en) * | 1988-05-18 | 1989-11-23 | Mitsubishi Materials Corporation | Electric device |
| JPH07107420A (en) * | 1993-09-30 | 1995-04-21 | Hitachi Ltd | Display device |
| US5990417A (en) * | 1993-06-07 | 1999-11-23 | Nippon Telegraph And Telephone Corporation | Electromagnetic noise absorbing material and electromagnetic noise filter |
| US6037046A (en) * | 1997-01-13 | 2000-03-14 | Symetrix Corporation | Multi-component electromagnetic wave absorption panels |
| KR200207558Y1 (en) * | 2000-02-08 | 2000-12-15 | 반석제로파주식회사 | The electromagnetic wave absorptive devices for computer monitor |
-
2001
- 2001-04-28 KR KR1020010023216A patent/KR20020053692A/en not_active Application Discontinuation
- 2001-06-22 WO PCT/KR2001/001066 patent/WO2002089550A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0342971A2 (en) * | 1988-05-18 | 1989-11-23 | Mitsubishi Materials Corporation | Electric device |
| US5990417A (en) * | 1993-06-07 | 1999-11-23 | Nippon Telegraph And Telephone Corporation | Electromagnetic noise absorbing material and electromagnetic noise filter |
| JPH07107420A (en) * | 1993-09-30 | 1995-04-21 | Hitachi Ltd | Display device |
| US6037046A (en) * | 1997-01-13 | 2000-03-14 | Symetrix Corporation | Multi-component electromagnetic wave absorption panels |
| KR200207558Y1 (en) * | 2000-02-08 | 2000-12-15 | 반석제로파주식회사 | The electromagnetic wave absorptive devices for computer monitor |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20020053692A (en) | 2002-07-05 |
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