KR940009050B1 - Electromagnetic wave non-radiation display device - Google Patents
Electromagnetic wave non-radiation display device Download PDFInfo
- Publication number
- KR940009050B1 KR940009050B1 KR1019910017231A KR910017231A KR940009050B1 KR 940009050 B1 KR940009050 B1 KR 940009050B1 KR 1019910017231 A KR1019910017231 A KR 1019910017231A KR 910017231 A KR910017231 A KR 910017231A KR 940009050 B1 KR940009050 B1 KR 940009050B1
- Authority
- KR
- South Korea
- Prior art keywords
- electromagnetic wave
- display device
- image display
- leakage
- electromagnetic waves
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/86—Vessels; Containers; Vacuum locks
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/86—Vessels; Containers; Vacuum locks
- H01J29/87—Arrangements for preventing or limiting effects of implosion of vessels or containers
Abstract
Description
제1도는 본 발명이 적용된 음극선관의 평면도.1 is a plan view of a cathode ray tube to which the present invention is applied.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 벌브 2 : 페이스글라스1: Bulb 2: Face glass
3 : 펀넬 4 : 페라이트층3: funnel 4: ferrite layer
5 : 애노오드5: anode
본 발명은 주로 화면 전방을 통해 전자파가 방사되지 않게 한 전자파 비방사형 영상표시장치에 관한 것이다.The present invention mainly relates to an electromagnetic non-emissive image display device in which electromagnetic waves are not emitted through the front of the screen.
컴퓨터가 보편적인 필수품으로 범용화됨에 따라 작업자는 컴퓨터의 모니터를 통해 장시간 전자파를 받게 되어 건강을 해치게 되는 문제가 대두되기에 이르렀다.As computers have become a universal necessity, workers have been exposed to electromagnetic waves for a long time through the monitors of computers, causing problems of health.
영상표시장치에서 화면 전방을 통해 방사되는 전자파로 인하여 나타나는 신체상의 질병은 아직 뚜렷하게 확인된 종류는 없지만 대체로 편두통, 피로감, 시각상의 명멸감, 어지럼증 등을 호소하고 있다.Physical illness caused by electromagnetic waves radiated through the front of the screen in the image display apparatus has not been clearly identified, but generally complains of migraine, fatigue, visual flicker, and dizziness.
상기의 전자파 영향을 없애는 근본적인 방법으로는 영상표시장치의 화면전방을 통해 전자파가 누설되지 않게 하는 것이며, 이를 위해서 종래부터 편광필터나 개선된 접지방법 등으로 해결하려 했지만 아직 뚜렷한 성과는 거두지 못하고 있는 실정이다.The fundamental method of eliminating the effects of electromagnetic waves is to prevent the leakage of electromagnetic waves through the front of the screen of the image display device. To this end, conventionally, the polarizing filter and the improved grounding method have been tried to solve the problem, but the results are not clear yet. to be.
영상표시장치에서 화면 전방을 통해 측정되는 전자파의 누설량은 페이스 글라스와 판넬의 이음새부분과, 고압이 인가되는 애노오드단자 주위에서 누설되는 양이 60% 이상을 차지하고 있다.The amount of leakage of electromagnetic waves measured through the front of the screen in the image display device is more than 60% of the leakage around the joint portion of the face glass and panel, and the anode terminal to which high pressure is applied.
그러므로 상기의 이음새부분과 애노오드로부터 누설되는 전자파를 억제할 수 있다면, 어렵지 않게 화면의 전방으로 방사되는 전자파의 양을 인체에 무해한 수준으로 저하시킬 수 있다.Therefore, if the electromagnetic wave leaking from the seam and the anode can be suppressed, it is not difficult to reduce the amount of electromagnetic radiation emitted to the front of the screen to a level harmless to the human body.
본 발명은 상기와 같은 화면 전방을 통해 방사되는 전자파를 인체에 무해한 수준으로 억제할 수 있는 전자파 비방사형 영상표시장치를 제공함에 있다.The present invention provides a non-radioactive image display device capable of suppressing the electromagnetic waves emitted through the front of the screen to a level harmless to the human body.
상기 목적에 따라 본 발명은 음극선관을 구성하는 페이스 글라스와 펜넬의 이음새부분과 또 애노오드단자를 주회하여 페라이트층을 형성시켜 이 부분을 통한 전자파의 누설이 방지되게 함을 특징으로 한다.In accordance with the above object, the present invention is characterized by preventing the leakage of electromagnetic waves through this part by forming a ferrite layer by circumferring the seam and the anode terminal of the face glass and the fennel constituting the cathode ray tube.
페라이트층은 유리에 접합될 수 있는 수지, 예를 들면 에폭시나 아크릴수지에 페라이트 분말과 철분을 적절한 비율로 혼합하여 스프레이도포함으로써 영상표시장치의 임의개소에 소망하는 패턴으로 형성될 수 있다.The ferrite layer may be formed in a desired pattern on any part of the image display apparatus by spray coating a ferrite powder and iron powder in an appropriate proportion to a resin that can be bonded to glass, for example, epoxy or acrylic resin.
이하 본 발명을 첨부도면에 따라 실시예로서 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
도면은 본 발명은 관련된 음극선관의 평면도를 나타내고 있다.The figure shows a plan view of a cathode ray tube associated with the present invention.
벌브(1)를 구성하는 페이스 글라스(2)와 펀넬(3) 사이의 이음새로 페라이트층(4)이 도포되고, 이 페라이트층(4)의 일부는 펀넬(3)에 부착된 애노오드(5)의 주위를 둘러 쌓고 있다.A ferrite layer 4 is applied to the seams between the face glass 2 and the funnel 3 constituting the bulb 1, and a part of the ferrite layer 4 is attached to the anode 5 attached to the funnel 3. Surrounds).
상기한 페라이트층(4)은 알루미늄재 도전테이프(6)를 경유하여 접지된다.The ferrite layer 4 is grounded via the aluminum conductive tape 6.
이와 같은 구조의 본 발명 영상표시장치를 14˝ 칼라 모니터로 제작하여 전자파 누설측정의 공인기관인 스웨덴의 SWEDAC에 전자파 방사측정을 의뢰한 결과는 다음 표 1과 같이 나타났다.The image display device of the present invention having such a structure was fabricated as a 14˝ color monitor, and the result of requesting electromagnetic radiation measurement to SWEDAC, Sweden, an authorized institution for electromagnetic leakage measurement, is shown in Table 1 below.
[표 1]TABLE 1
참고로 국제적으로 공인된 영상표시장치의 전자파 누설 허용치는 교류전계 ; ELF 25V/m, VLF 2.5V/m, 자계 ; ELF 250nT, VLF 25nT이므로 상술한 본 발명 영상표시장치는 국제적으로 공인된 허용치 이내로 전자파가 누설되는 우수한 효과를 갖는 것으로 입증된다.For reference, the electromagnetic leakage tolerance of the internationally recognized image display device is alternating with the AC field; ELF 25 V / m, VLF 2.5 V / m, magnetic field; Since ELF 250nT and VLF 25nT, the above-described image display apparatus of the present invention is proved to have an excellent effect of leakage of electromagnetic waves within internationally recognized tolerance values.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019910017231A KR940009050B1 (en) | 1991-10-01 | 1991-10-01 | Electromagnetic wave non-radiation display device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019910017231A KR940009050B1 (en) | 1991-10-01 | 1991-10-01 | Electromagnetic wave non-radiation display device |
Publications (2)
Publication Number | Publication Date |
---|---|
KR930008935A KR930008935A (en) | 1993-05-22 |
KR940009050B1 true KR940009050B1 (en) | 1994-09-29 |
Family
ID=19320652
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019910017231A KR940009050B1 (en) | 1991-10-01 | 1991-10-01 | Electromagnetic wave non-radiation display device |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR940009050B1 (en) |
-
1991
- 1991-10-01 KR KR1019910017231A patent/KR940009050B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR930008935A (en) | 1993-05-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4901141A (en) | Fiberoptic display for a video image | |
KR940009050B1 (en) | Electromagnetic wave non-radiation display device | |
Solzbach et al. | Optical distortion due to geomagnetism in quantitative angiography | |
US5404084A (en) | Method of and apparatus for canceling electric field | |
JPH0625917B2 (en) | Electromagnetic shield for display device | |
US5365285A (en) | CRT display device with a grounded rimband so as to suppress an electro-magnetic emission | |
US5485056A (en) | Monitoring device | |
KR970003234B1 (en) | Cathode ray tube | |
JPH05205661A (en) | Crt display device | |
EP0708474B1 (en) | Cathode-ray tube display unit in which unwanted radiant electric field from face plate of cathode-ray tube is decreased | |
EP0774743A2 (en) | Apparatus for suppressing field radiation from a cathode ray tube | |
US5689157A (en) | Cathode-ray tube display unit in which unwanted radiant electric field from face plate of cathode-ray tube is decreased | |
Fang et al. | Measurement of radiated emission from PC computer system | |
KR0139550Y1 (en) | Electric field elimination apparatus of display | |
JPS59169041A (en) | Filter for preventing glare | |
JPS61151955A (en) | Electromagnetic shielding body of cathode-ray tube | |
KR100220007B1 (en) | The rear radiation electromagnetic of field shield device for picture display | |
KR960011770B1 (en) | Cathode ray tube screening arrangement | |
US5521612A (en) | Method and device for reduction of electric field radiation from a liquid crystal display unit | |
US5815361A (en) | Magnetic field shielding device in display | |
JPS60253135A (en) | Display device | |
JPH01122552A (en) | Picture tube | |
KR930008704B1 (en) | Image display device for cathode-ray tube | |
JP2597553Y2 (en) | Antistatic cathode ray tube | |
EP0568702A1 (en) | Cathode-ray tube |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
G160 | Decision to publish patent application | ||
E701 | Decision to grant or registration of patent right | ||
GRNT | Written decision to grant | ||
FPAY | Annual fee payment |
Payment date: 20010830 Year of fee payment: 8 |
|
LAPS | Lapse due to unpaid annual fee |