KR19990026171A - Method of manufacturing cathode ray tube - Google Patents
Method of manufacturing cathode ray tube Download PDFInfo
- Publication number
- KR19990026171A KR19990026171A KR1019970048186A KR19970048186A KR19990026171A KR 19990026171 A KR19990026171 A KR 19990026171A KR 1019970048186 A KR1019970048186 A KR 1019970048186A KR 19970048186 A KR19970048186 A KR 19970048186A KR 19990026171 A KR19990026171 A KR 19990026171A
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- KR
- South Korea
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- ray tube
- cathode ray
- support frame
- inner shield
- recrystallization temperature
- Prior art date
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
-
- 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
- H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
- H01J29/06—Screens for shielding; Masks interposed in the electron stream
-
- 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
- H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
- H01J29/06—Screens for shielding; Masks interposed in the electron stream
- H01J29/07—Shadow masks for colour television tubes
- H01J29/073—Mounting arrangements associated with shadow masks
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Electrodes For Cathode-Ray Tubes (AREA)
Abstract
본 발명은 음극선관용 인너쉴드 및 서포트프레임을 재결정 온도 이상으로 열처리하여 자기적 특성을 향상시켜 외부자계를 효과적으로 차폐함으로써 전자빔의 미스랜딩량을 줄여 음극선관의 색순도를 향상시키는 것에 관한 것으로, 서포트프레임에 지지된 새도우마스크를 구비한 음극선관에 있어서, 강판을 기계가공하여 일정 형태로한 인너쉴드 및 서포트프레임을 불활성가스 분위기에서 재결정온도 이상으로 열처리한 후 흑화피막 처리하여서 됨을 특징으로 하는 음극선관의 제조방법에 관한 기술이다.The present invention relates to improving the color purity of a cathode ray tube by reducing the amount of mis-landing of an electron beam by heat-treating the inner shield for the cathode ray tube and the support frame above a recrystallization temperature to improve magnetic properties to effectively shield external magnetic fields. In the cathode ray tube having a supported shadow mask, a cathode ray tube characterized in that the inner shield and support frame formed by machining a steel sheet are heat treated at a recrystallization temperature or higher in an inert gas atmosphere and then blackened. It is a description of the method.
Description
본 발명은 칼라음극선관에 관한 것으로, 특히 인너쉴드 및 서포트프레임을 재결정 온도 이상으로 열처리함에 따라 자기적 특성 향상으로 외부자계를 효과적으로 차폐함으로써 전자빔의 미스랜딩량을 줄여 음극선관의 색순도를 향상시키는 것에 관한 것이다.The present invention relates to a color cathode ray tube, and in particular, to improve the color purity of the cathode ray tube by reducing the amount of mis-landing of the electron beam by effectively shielding the external magnetic field by improving the magnetic properties as the inner shield and the support frame are heat treated above the recrystallization temperature. It is about.
기존의 칼라음극선관은 도 1에 나타낸 바와 같이, 3색 형광막이 도포된 판넬(1)과 후방으로 네크부(3)를 갖는 펀넬(2)이 융착 결합되어 이루어지고, 네크부(3)에는 전자빔(9)을 발생시키는 전자총(7), 전자빔을 수평 또는 수직방향으로 편향시켜 주는 편향요크(8)가 설치되고, 판넬 내측 서포트프레임(5)에는 전자빔의 새도우마스크(4)가 지지고정된다.In the conventional color cathode ray tube, as shown in FIG. 1, a panel 1 coated with a three-color fluorescent film and a funnel 2 having a neck portion 3 in the rear are fusion-bonded. An electron gun 7 for generating an electron beam 9 and a deflection yoke 8 for deflecting the electron beam in a horizontal or vertical direction are provided, and a shadow mask 4 of the electron beam is supported and fixed to the panel inner support frame 5. .
그리고 펀넬측의 서포트프레임(5)에는 전자빔이 지자계나 누설자계에 의해 진로가 변형(미스랜딩 : Mislanding)되지 않도록 막아주는 인너쉴드(Inner shield)(6)가 고정된다.An inner shield 6 is fixed to the support frame 5 on the funnel side to prevent the electron beam from being deformed (mislanded) by a geomagnetic or leakage magnetic field.
즉, 상기 구조에서 새도우마스크(4)를 통과한 전자빔이 축방향의 수평자계에 대한 대응이 부족하여 미스랜딩으로 화상열화 현상이 발생되는데 이런 문제를 방지하기 위해 인너쉴드(6)를 지지하는 서포트프레임(5)에 부착하는 것이다.That is, the electron beam passing through the shadow mask 4 in the structure lacks the correspondence to the horizontal magnetic field in the axial direction, causing image degradation due to mislanding. The support for supporting the inner shield 6 to prevent such a problem is caused. It is attached to the frame 5.
이때 인너쉴드(6)는 음극선관으로 유입되는 외부자계를 도 2a와 같이 인너쉴드를 타고 흐르게 함으로써 음극선관 내부에 발생되는 외부자계를 감소시킨다.At this time, the inner shield 6 reduces the external magnetic field generated inside the cathode ray tube by allowing the external magnetic field introduced into the cathode ray tube to flow through the inner shield as shown in FIG. 2A.
그러나 외부자계를 감소시키는 요소로써 인너쉴드의 자기적 특성중 투자율이 좌우하게 된다.However, the magnetic permeability of the inner shield is the factor that reduces the external magnetic field.
인너쉴드 및 서포트프레임을 얻기 위해서는 강판을 드로잉 또는 포밍한 후 흑화처리하는데, 이와 같은 가공시는 기계적변형이 많은 코나부 및 벤딩(Bending)부는 자기적 특성이 크게 저하되고, 이와 같은 인너쉴드 및 서포트프레임의 자기적 특성 불균일로 인해 전자총에서 나온 전자빔의 미스랜딩이 커진다.In order to obtain the inner shield and the support frame, the steel sheet is drawn or formed and then blackened. In this processing, the magnetic part and the bending part, which have many mechanical deformations, are greatly deteriorated in magnetic properties. The nonuniformity of the magnetic properties of the frame increases the mislanding of the electron beam from the electron gun.
이에 따라 도 2b와 같이 외부자계 영향을 받아서 음극선관에 유입되는 외부자계가 코나부에 집중하게 되고, 코나부에 집속된 자계가 3차원 공간속으로 흘러 전자총에서 나온 전자빔의 편향을 일으켜 미스랜딩이 생기게 됨에 따라 음극선관의 색순도를 저하시키는 문제점이 있었다.Accordingly, as shown in FIG. 2B, the external magnetic field that is introduced into the cathode ray tube is concentrated on the nose part as shown in FIG. 2B, and the magnetic field focused on the nose part flows into the three-dimensional space, causing the electron beam from the electron gun to be deflected. As a result, there was a problem of lowering the color purity of the cathode ray tube.
본 발명은 상기한 종래의 문제점을 해결하기 위해 안출한 것으로, 불균일한 자기분포 및 인너쉴드의 특성을 향상시키기 위해 인너쉴드 및 서포트프레임을 재결정온도 이상에서 열처리하고 표면에 흑화피막처리 함으로써 자기적 특성을 향상시켜 지자계 영향으로 인한 미스랜딩 발생의 억제로 색순도 저하를 방지하고자 하는데 그 목적이 있다.The present invention has been made to solve the above-mentioned conventional problems, in order to improve the characteristics of the non-uniform magnetic distribution and the inner shield magnetic properties by heat-treating the inner shield and the support frame above the recrystallization temperature and blackening the surface The purpose of the present invention is to prevent degradation of color purity by suppressing mis-landing caused by the influence of geomagnetic field.
도 1은 기존의 칼라음극선관의 개략 단면도1 is a schematic cross-sectional view of a conventional color cathode ray tube
도 2a는 칼라음극선관에 작용하는 외부자계의 전체 흐름도Figure 2a is an overall flow chart of the external magnetic field acting on the color cathode ray tube
도 2b는 도 2a의 A부분 확대도FIG. 2B is an enlarged view of portion A of FIG. 2A
도 3은 미스랜딩량을 나타낸 그래프3 is a graph showing mislanding amount
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
5 : 서포트프레임 6 : 인너쉴드5: Support Frame 6: Inner Shield
상기 목적 달성을 위한 본 발명은 서포트프레임에 지지된 새도우마스크를 구비한 음극선관에 있어서, 강판을 드로잉 또는 포밍(forming)하여 제조한 인너쉴드 및 서포트프레임을 수소와 질소의 혼합가스분위기에서 재결정 온도 이상으로 열처리하고, 흑화피막처리하여 됨을 특징으로 하는 인너쉴드 및 그를 지지하는 서포트프레임의 제조방법으로 구성된다.The present invention for achieving the above object is a cathode ray tube having a shadow mask supported on the support frame, the inner shield and the support frame prepared by drawing or forming a steel sheet (recrystallization temperature in a mixed gas atmosphere of hydrogen and nitrogen) The inner shield is characterized in that the heat treatment and blackening coating process as described above, and a method of manufacturing a support frame for supporting the inner shield.
상기 재결정온도 열처리는 700∼900℃ 에서 5∼60분간 처리함으로써 결정립의 성장이 이루어지기 때문에 자기적 특성인 투자율이 좋아지고 보자력은 작아지게 되어 자계차폐의 성능이 향상되어 진다.Since the recrystallization temperature heat treatment is performed for 5 to 60 minutes at 700 to 900 ° C., the grains grow, so that the magnetic permeability is improved and the coercive force is reduced, thereby improving the performance of the magnetic shield.
본 발명을 실시예에 따라 상세히 설명하면, 알루미늄 킬드강 및 탄소강으로된 판을 가공하여(드로잉 또는 포밍) 원하는 형태의 인너쉴드 및 서포트프레임으로 제작한 후 열처리분위기를 수소와 질소의 혼합가스를 사용하는 분위기하에서 700∼900℃ 온도로 5∼60분간 열처리하고, 이어서 흑화피막처리한다.When the present invention will be described in detail according to the embodiment, the plate made of aluminum and steel steel and carbon steel (drawing or forming) to produce the inner shield and the support frame of the desired shape and then heat treatment atmosphere using a mixed gas of hydrogen and nitrogen Heat treatment is performed for 5 to 60 minutes at a temperature of 700 to 900 ° C. under an atmosphere of 4 ° C., followed by blackening.
표 1은 상기 처리후 나타난 물성을 나타낸 것이다.Table 1 shows the physical properties shown after the treatment.
상기 표 1과 같이 자기적 특성을 향상시킴으로써 도 2a에서처럼 음극선관으로 흐르는 외부자계를 인너쉴드/서포트프레임을 타고 쉽게 흐르게해 음극선관 내부에 발생하는 외부자계를 줄이고, 도 2b와 같은 코나부에 집속하는 자계량을 안정화 시킴으로써 3차원 공간속으로 흘러 미스랜딩의 영향을 줄여준다.By improving the magnetic properties as shown in Table 1, the external magnetic field flowing to the cathode ray tube easily flows through the inner shield / support frame to reduce the external magnetic field generated inside the cathode ray tube as shown in FIG. By stabilizing the magnetic field belonging to it, it flows into three-dimensional space and reduces the effects of mislanding.
도 3은 상기 제조된 인너쉴드 및 서포트프레임을 조립한 음극선관에 대해 지자계를 가변시켜 가면서 미스랜딩의 량을 측정한 것이다.Figure 3 is a measure of the amount of mis-landing while varying the geomagnetic field for the cathode ray tube assembled the inner shield and the support frame prepared above.
그 결과 표 1과 같은 특성을 갖는 본 발명이 미스랜딩량이 현저히 줄어드는 현상을 보이고 있다.As a result, the present invention having the characteristics as shown in Table 1 shows a phenomenon that the amount of mis-landing is significantly reduced.
즉, 미스랜딩량이 기존의 60㎛에서 본 발명의 경우 20㎛으로 개선됨을 알 수 있다.In other words, it can be seen that the amount of mis-landing is improved from 20 μm to 60 μm in the present invention.
이상에서와 같이 인너쉴드 및 서포트프레임 형태를 위한 가공시의 기계적 변형이 많은 코나부 및 벤딩(Bending)부의 자기적 특성의 저하 및 이로 인한 전자빔의 미스랜딩이 커진 것을 본 발명에서처럼 열처리함으로써 투자율 및 보자력 특성을 좋게 하여 자기특성의 균일화로 음극선관의 색순도를 향상시킨 효과를 갖는다.As described above, permeability and coercivity are obtained by heat-treating the magnetic properties of the nose and bending parts, which have a lot of mechanical deformation during processing for the inner shield and the support frame, and the mis-landing of the electron beam. It has the effect of improving the color purity of the cathode ray tube by improving the characteristics and uniformity of the magnetic properties.
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019970048186A KR100253008B1 (en) | 1997-09-23 | 1997-09-23 | Method for manufacturing crt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019970048186A KR100253008B1 (en) | 1997-09-23 | 1997-09-23 | Method for manufacturing crt |
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| Publication Number | Publication Date |
|---|---|
| KR19990026171A true KR19990026171A (en) | 1999-04-15 |
| KR100253008B1 KR100253008B1 (en) | 2000-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1019970048186A KR100253008B1 (en) | 1997-09-23 | 1997-09-23 | Method for manufacturing crt |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6825598B2 (en) | 2002-01-29 | 2004-11-30 | Samsung Sdi Co., Ltd. | Tension mask with inner shield structure for cathode ray tube |
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1997
- 1997-09-23 KR KR1019970048186A patent/KR100253008B1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6825598B2 (en) | 2002-01-29 | 2004-11-30 | Samsung Sdi Co., Ltd. | Tension mask with inner shield structure for cathode ray tube |
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| Publication number | Publication date |
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| KR100253008B1 (en) | 2000-04-15 |
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