KR910003946Y1 - Shadowmask of color cathod ray tube - Google Patents
Shadowmask of color cathod ray tube Download PDFInfo
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- KR910003946Y1 KR910003946Y1 KR2019880017778U KR880017778U KR910003946Y1 KR 910003946 Y1 KR910003946 Y1 KR 910003946Y1 KR 2019880017778 U KR2019880017778 U KR 2019880017778U KR 880017778 U KR880017778 U KR 880017778U KR 910003946 Y1 KR910003946 Y1 KR 910003946Y1
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- shadow mask
- color
- film
- heat radiation
- shadowmask
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Classifications
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- 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
Abstract
내용 없음.No content.
Description
제 1 도는 일반적인 칼라브라운관을 보인 개략도.1 is a schematic view showing a general color tube.
제 2 도는 종래의 섀도우마스크와 판넬 사이의 열복사선을 보인 설명도.2 is an explanatory view showing a heat radiation line between a conventional shadow mask and the panel.
제 3 도는 본 고안의 섀도우마스크와 판넬 사이의 열복사선을 보인 설명도.Figure 3 is an explanatory view showing the heat radiation between the shadow mask and the panel of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
11 : 판넬 12 : 형광막11 panel 12 fluorescent film
14 : 섀도우마스크 15 : 반사막14: shadow mask 15: reflective film
본 고안은 판넬의 내측에 고정되어 전자총에 발사되는 적색, 녹색 및 청색의 3개의 전자빔을 통과시키는 칼라 브라운관의 섀도우마스크에 관한 것이다.The present invention relates to a shadow mask of a color CRT tube which is fixed inside the panel and passes three electron beams of red, green and blue which are fired to the electron gun.
칼라브라운관은 제 1 도에 도시된 바와 같이 판넬(1)의 내면에 형광막(2) 및 Al증착막(3)이 형성되어 있고, 형광막(2)과 일정간격을 유지하면서 섀도우마스크(4)가 고정되며, 피널(5)의 네크부내에 적색, 녹색 및 청색의 전자빔을 발사하는 전자총(6)이 고정되고 아울러 네크부의 외측에 전자빔을 편향코일(7)이 고정되어 있다.As shown in FIG. 1, the color-brown tube is formed with a fluorescent film 2 and an Al deposition film 3 on the inner surface of the panel 1, and maintains a constant distance from the fluorescent film 2, while the shadow mask 4 is formed. Is fixed, the electron gun 6 for emitting red, green and blue electron beams is fixed in the neck portion of the final section 5, and the electron beam deflecting coil 7 is fixed to the outside of the neck portion.
섀도우마스크(4)는 칼라브라운관의 크기에 따라 다소차이는 있으나, 전면에 걸쳐서 수십만개 정도의 작은 전자빔통과공(4A)형성되어, 전자총(6)에서 발사되는 3개의 전자빔이 편향코일(7)에 의해 편향되고, 섀도우마스크(4)의 전자빔통과공(4A)을 통과한 후 형광막(2)의 각 색형광체에 충돌되어 하나의 점을 디스플레이하게 되고 디스플레이된 점들이 모여 하나의 화면을 형성하게 된다.Although the shadow mask 4 is somewhat different depending on the size of the color CRT, hundreds of thousands of small electron beam through holes 4A are formed on the front surface, so that three electron beams emitted from the electron gun 6 are deflected coils 7. Deflected by the light, passes through the electron beam through hole 4A of the shadow mask 4, and then collides with each color phosphor of the fluorescent film 2 to display one point, and the displayed points are gathered to form a screen. Done.
이와 같은 칼라브라운관이 동작하여 소정의 화면을 디스플레이함에 있어서, 전자총(6)에 발사된 전자빔의 약 15-30% 정도는 섀도우마스크(4)의 전자빔통과공(4A)을 통과하여 형광막(2)에 충돌되나, 나머지 약 70-85% 정도의 전자빔은 섀도우마스크(4)에 충돌되어 섀도우마스크(4)는 가열되면서 제 2 도에 도시된 바와 같이 열복사선(8)을 방사하게 되고, 방사된 열복사선(8)은 판넬(1)의 내면에 형성된 Al증착막(3)에서 반사된 후 섀도우마스크(4)로 다시 입사되어 섀도우마스크(4)는 점점 더 가열되며, 이와 같이 섀도우마스크(4)가 가열됨에 따라 섀도우마스크(4)로 다시 입사되어 섀도우마스크(4)는 점점 더 가열되며, 이와 같이 섀도우마스크(4)가 가열 됨에 따라 섀도우마스크(4)는 열팽창, 즉, 도밍(DOMING) 현상이 발생하게 되므로 전자총(6)에서 발사된 전자빔이 형광막(2)의 색형광체에 정확히 충돌되지 못하여 디스플레이된 화면의 색순도가 저하되게 된다.In the operation of such a color-brown tube to display a predetermined screen, about 15-30% of the electron beam emitted to the electron gun 6 passes through the electron beam passing hole 4A of the shadow mask 4 and the fluorescent film 2 ), But the remaining about 70-85% of the electron beam impinges on the shadow mask 4 so that the shadow mask 4 is heated to radiate heat radiation 8 as shown in FIG. The heat radiation lines 8 are reflected from the Al deposition film 3 formed on the inner surface of the panel 1 and then incident again into the shadow mask 4 so that the shadow mask 4 is heated more and more, and thus the shadow mask 4 ) As it is heated back into the shadow mask 4 so that the shadow mask 4 is heated more and more, and as the shadow mask 4 is heated, the shadow mask 4 is thermally expanded, i.e., doming. Phenomenon occurs, the electron beam emitted from the electron gun 6 is fluorescent Are presented (2) mothayeo not accurately collide with the phosphor color decrease the color purity of the displayed screen.
이와 같이 도밍현상을 감소시키기 위한 방법으로서, Al증착막(3)의 표면에 흑연을 도포하는 방법, 산화니켈, 산화텅스텐, 질화리듐 및 탄화붕소 등과 같은 흑색의 외관물질을 Al증착막(3)의 표면에 증착하는 방법, Al증착막(3)을 형성하는 종료단계에서 진공도를 낮추어 Al증착막(3)을 흑화시키는 방법 및 바륨아지드 등과 같이 열분해에 의해 질소를 방출하는 물질을 가열하여 질소분위기를 형성하고 그 질소분위기에서 Al증착막(3)을 형성하여 흑화막이 형성되게 하는 방법등과 같이 Al증착막(3)의 표면에 검은 물질을 피복하여 섀도우마스크(4)에서 방사되는 열복사선(8)을 흡수하고, 여전히 Al증착막(3)에서 많은 열복사선(9)이 반사되었음은 물론 섀도우마스크(4)의 열전도도가 낮아 열의 방사가 나빴으므로 도밍현상이 심하게 발생하였다.As a method for reducing the dope phenomenon as described above, a method of applying graphite to the surface of the Al deposition film 3, a black external material such as nickel oxide, tungsten oxide, lithium nitride and boron carbide, the surface of the Al deposition film 3 A method of depositing on a film, a method of lowering a degree of vacuum in the final step of forming an Al film 3, and a method of blackening the Al film 3, and a nitrogen atmosphere by heating a material that releases nitrogen by thermal decomposition, such as barium azide, In such a nitrogen atmosphere, a black material is coated on the surface of the Al deposition film 3 so as to form an Al deposition film 3 so as to form a blackening film, and the heat radiation 8 emitted from the shadow mask 4 is absorbed. In addition, many thermal radiation lines 9 were reflected on the Al deposition film 3, and the thermal conductivity of the shadow mask 4 was low, resulting in poor heat radiation.
그리고, 섀도우마스크(4)를 인바르(INVAR)제 등과 같이 열팽창계수가 낮은 재질로 형성되는 방법 및 전자총(6)을 마주보는 섀도우마스크(4)의 표면에 프리트 그라스(납 붕산염 그라스)를 스프레이범에 의해 파착되는 방법등과 같이 섀도우마스크(4)의 열팽창을 감소시키는 방법도 제시되어 있으나, Al증착막(3)에서 반사되는 많은 열복사선(9)에 의해 섀도우마스크(4)가 계속 가열되었음을 물론 섀도우마스크(4)의 열방사가 낮았으므로 이 또한 도밍현상이 심하게 발생하였다.Then, the shadow mask 4 is formed of a material having a low coefficient of thermal expansion such as made by INVAR, etc. and frit glass (lead borate glass) is sprayed on the surface of the shadow mask 4 facing the electron gun 6. A method of reducing the thermal expansion of the shadow mask 4 is also proposed, such as a method of being seized by a panther, but the shadow mask 4 is continuously heated by many heat radiation rays 9 reflected from the Al deposition film 3. Of course, since the heat radiation of the shadow mask (4) was low, this also caused severely dominant phenomenon.
따라서, 본 고안의 목적은 Al증착막에서 반사되는 열복사선을 흡수하지 않고 다시 반사함은 물론 열전도율을 높임으로써 섀도우마스크에 도밍현상의 발생이 감소되는 섀도우마스크를 제공함에 있다.Accordingly, an object of the present invention is to provide a shadow mask which does not absorb the heat radiation reflected from the Al deposition film and reflects it again, and also increases the thermal conductivity, thereby reducing the occurrence of the dominant phenomenon in the shadow mask.
이하, 첨부된 제 3 도의 도면을 참조하면 상기한 목적을 가지는 본 고안의 섀도우마스크를 상세히 설명하면 다음과 같다.Hereinafter, referring to the accompanying drawings of FIG. 3, the shadow mask of the present invention having the above purpose will be described in detail.
제 3 도에 도시된 바와 같이 칼라브라운관의 판넬(11)의 내측에 형성된 형광막(12) 및 Al증착막(13)과 일정간격을 유지하면서 고정되는 섀도우마스크(14)에 있어서, 형광막(12)을 마주보는 섀도우마스크(14)의 전면에 Al등과 같이 백색으로 반사율이 높고, 섀도우마스크(14)보다 열전도도가 높은 물질을 더미판넬로 진공증착시켜 반사막(15)를 형성한 것이다.As shown in FIG. 3, in the shadow mask 14 fixed at a constant distance from the fluorescent film 12 and the Al deposition film 13 formed inside the panel 11 of the color brown tube, the fluorescent film 12 The reflective mask 15 is formed by vacuum-depositing a material having a high reflectance of white, such as Al, on the front of the shadow mask 14 facing the surface of the shadow mask 14, and having a higher thermal conductivity than the shadow mask 14 with a dummy panel.
이와 같은 본 고안은 칼라브라운관이 동작 할 경우에 전자빔의 약 15-30% 정도는 전자빔통과공(14A)을 통과한 후 형광막(12)에 충돌되고 나머지 70-85% 전자빔은 섀도우마스크(14)에 충돌되면서 가열하여 섀도우마스크(14)는 Al증착막(13) 방향으로 열복사선(16)을 방사하게 되며, 그 방사한 열복사선(16)은 Al증착막(13)에서 반사되어 섀도우마스크(14)로 입사되나, 이때 본 고안의 섀도우마스크(14)는 반사막(15)을 형성하여 Al증착막(13)에서 반사된 열복사선(17)이 반사막(15)에서 반사되고, 섀도우마스크(14)에 흡수되지 않게 되며, 또한 반사막(15)의 열전도도가 높은 열방사율이 많아지게 되므로 섀도우마스크(14)의 온도가 낮아지게 되어 도밍현상이 감소된다.In the present invention, when the color CRT operates, about 15-30% of the electron beam passes through the electron beam through hole 14A, and then impinges on the fluorescent film 12, and the remaining 70-85% electron beam emits a shadow mask (14). The shadow mask 14 radiates the heat radiation line 16 toward the Al deposition film 13 in the direction of impingement to the Al deposition film 13, and the radiated heat radiation line 16 is reflected from the Al deposition film 13 to reflect the shadow mask 14. In this case, the shadow mask 14 of the present invention forms a reflective film 15 so that the heat radiation lines 17 reflected from the Al deposition film 13 are reflected from the reflective film 15, and the shadow mask 14 is applied to the shadow mask 14. Since it is not absorbed, and the thermal emissivity of the high thermal conductivity of the reflective film 15 is increased, the temperature of the shadow mask 14 is lowered, thereby reducing the doming phenomenon.
이상에서와 같이 본 고안의 섀도우마스크는 Al증착막에서 반사되는 열복사선을 흡수하지 않고 다시 반사시킴은 물론 열전도도가 높아지므로 도밍현상이 감소되어 화면의 색순도가 향상되는 효과가 있다.As described above, the shadow mask of the present invention does not absorb the heat radiation reflected from the Al deposition film and reflects it again, and also increases the thermal conductivity, thereby reducing the dominant phenomenon and improving the color purity of the screen.
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KR2019880017778U KR910003946Y1 (en) | 1988-10-31 | 1988-10-31 | Shadowmask of color cathod ray tube |
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KR2019880017778U KR910003946Y1 (en) | 1988-10-31 | 1988-10-31 | Shadowmask of color cathod ray tube |
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KR900009068U KR900009068U (en) | 1990-05-03 |
KR910003946Y1 true KR910003946Y1 (en) | 1991-06-08 |
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KR20200106286A (en) | 2019-03-04 | 2020-09-14 | 김영준 | Closed type roaster improved filter function |
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KR100319102B1 (en) * | 1999-08-27 | 2002-01-05 | 김순택 | Cathod ray tube having a shadow mask |
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Cited By (1)
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KR20200106286A (en) | 2019-03-04 | 2020-09-14 | 김영준 | Closed type roaster improved filter function |
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