KR0164884B1 - Cathode ray tube - Google Patents

Cathode ray tube Download PDF

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Publication number
KR0164884B1
KR0164884B1 KR1019940023472A KR19940023472A KR0164884B1 KR 0164884 B1 KR0164884 B1 KR 0164884B1 KR 1019940023472 A KR1019940023472 A KR 1019940023472A KR 19940023472 A KR19940023472 A KR 19940023472A KR 0164884 B1 KR0164884 B1 KR 0164884B1
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South Korea
Prior art keywords
shadow mask
bent portion
electron beam
present
mask
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KR1019940023472A
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Korean (ko)
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KR960012204A (en
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황희원
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엄길용
오리온전기주식회사
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00Apparatus 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
    • H01J9/02Manufacture of electrodes or electrode systems
    • H01J9/14Manufacture of electrodes or electrode systems of non-emitting electrodes
    • H01J9/142Manufacture of electrodes or electrode systems of non-emitting electrodes of shadow-masks for colour television tubes

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

본 발명은 브라운관의 판넬내면에 장착되어 잔자총에서 주사된 전자빔을 소망하는 형광면에 랜딩시키는 새도우마스크에 관한 것이다.The present invention relates to a shadow mask mounted on a panel inner surface of a CRT and landing an electron beam scanned from a residual gun on a desired fluorescent surface.

종래의 새도우마스크는 제1도에 도시된 바와 같이 열팽창계수가 극히 적은 인바아재질의 새도우마스크(S)를 제작,사용해왔으나, 이 인바아재로 새도우마스크(S)를 형성하였을 시에는 이 재질의 매우 높은 탄성강도로 인하여 절곡부(10)에 대한 포밍(forming)작업이 종료된 후에도 가상선과 같이 포밍전의 상태로 복귀하려는 스프링백(spring back)현상이 극히 높아 새도우마스크(S)의 제작불량이 속출하는 문제점이 있었다.Conventional shadow mask has been produced and used the shadow mask (S) of the invar material having a very low coefficient of thermal expansion as shown in Figure 1, when the shadow mask (S) is formed of this invar material Due to the very high elastic strength, the spring back phenomenon is extremely high to return to the state before forming like a virtual line even after the forming of the bent portion 10 is completed. There was an issue that went on.

따라서, 본 발명의 목적은 이러한 종래의 문제점을 감안하여 안출한 것으로서, 복수의 전자빔통과공이 천공된 인바아재질의 평판마스크주변의 절곡부만을 소정시간 열처리하여 소성시킨 다음, 이 절곡부를 프레스장치로 포밍가공함으로써, 전술한 절곡부의 스프링백현상으로 인한 새도우마스크의 불량을 극소화시킨 브라운관의 새도우마스크제작방법을 제공함에 있다.Therefore, an object of the present invention is devised in view of the above-described conventional problems, and heats only a bent portion around a flat plate mask of an in-bar material in which a plurality of electron beam through holes are perforated for a predetermined time, and then fires the bent portion with a press apparatus. The present invention provides a method for producing a shadow mask of a CRT tube by minimizing the defect of the shadow mask due to the spring back phenomenon of the bent portion.

이와 같은 목적을 달성하기 위하여 본 발명은 복수의 전자빔통과공이 천공된 평판마스크를 형성한 다음, 이 주변의 절곡부에 해당되는 부분을 약 700도에서 800도 사이로 열처리하되, 이 열처리를 약 20분에서 40분정도 실시하는 한편, 전술한 절곡부의 열처리가 종료됨과 동시에 이 부분을 프레스장치로 포밍가공하여서 된 것이다.In order to achieve the above object, the present invention forms a flat plate perforated with a plurality of electron beam through holes, and then heat-treat the portion corresponding to the bent portion at about 700 to 800 degrees, and the heat treatment is performed for about 20 minutes. After about 40 minutes at the same time, the heat treatment of the above-mentioned bent portion is finished, and this portion is formed by pressing with a press apparatus.

Description

브라운관의 새도우마스크제작방법How to make shadow mask of CRT

제1도는 통상적인 새도우마스크의 요부측단면도.1 is a side cross-sectional view of a conventional shadow mask.

제2도는 본 발명에 따른 평판마스크의 평면도.2 is a plan view of a flat plate mask according to the present invention.

제3도는 본 발명에 따른 새도우마스크의 요부측단면도.Figure 3 is a main cross-sectional side view of the shadow mask according to the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 평판마스크 10 : 절곡부1: flat plate mask 10: bend

S : 새도우마스크S: shadow mask

본 발명은 브라운관의 판넬내면에 장착되어 전자총에서 주사된 전자빔을 소망하는 형광면에 랜딩시키는 새도우마스크에 관한 것이다.The present invention relates to a shadow mask mounted on a panel inner surface of a CRT and landing an electron beam scanned by an electron gun on a desired fluorescent surface.

일반적으로 칼라브라운관은 잔자총에서 R,G,B 3개의 전자비임이 방출되어 편향장치에 의해 편향된 다음 지지프레임에 고정된 새도우마스크의 전자빔통과공을 통과하여 형광체와 충돌, 화면을 형성하게 된다.In general, the color CRT emits three R, G, and B beams from the remnant gun, deflects them by the deflecting device, and then passes through the electron beam passing holes of the shadow mask fixed to the support frame to collide with the phosphor and form a screen.

전술한 바와같이 동작시 전자총에서 발사된 전자비임중 약 15∼20%만이 새도우마스크의 전자빔통과공을 통과하여 판넬내면에 도포된 형광체에 도달하고 나머지 80∼85%는 새도우마스크와 충돌하여 열에너지를 발생시키게되고, 이에 따라 새도우마스크의 온도상승으로 새도우마스크가 열팽창을 일으키게 된다.As described above, only about 15 to 20% of the electron beam emitted from the electron gun passes through the electron beam through hole of the shadow mask to reach the phosphor coated on the panel surface, and the remaining 80 to 85% collides with the shadow mask to generate thermal energy. This causes the shadow mask to thermally expand due to the temperature increase of the shadow mask.

이와같이 새도우마스크가 열팽창을 하게 되면 판넬내면에 도포된 형광체와 새도우마스크의 전자빔통과공사이에 상대적인 위치변화가 일어난다.In this way, when the shadow mask is thermally expanded, a relative position change occurs between the phosphor coated on the inner surface of the panel and the electron beam passing construction of the shadow mask.

즉, 전자비임이 통과해야할 새도우마스크의 전자빔통과공이 도밍현상으로 인한 열변형때문에 전자빔통과공의 위치변화가 일어나 새도우마스크의 전자빔통과공을 통과한 전자빔이 해당되는 형광체에 도달하지 못하고 다른 형광체에 부딪혀 원래의 색을 재현하지 못하게 되므로 색순도가 저하되었다.In other words, the electron beam through hole of the shadow mask through which the electron beam must pass through changes in the position of the electron beam through hole due to thermal deformation due to the dominant phenomenon, and the electron beam passing through the electron beam through hole of the shadow mask does not reach the corresponding phosphor and hits another phosphor. The color purity was degraded because the original color could not be reproduced.

이를 방지하기 위해 근자에는 제1도에 도시된 바와 같이 열팽창계수가 극히 적은 인바아재질의 새도우마스크(S)를 제작,사용해왔으나, 이 인바아재로 새도우마스크(S)를 형성하였을 시에는 이 재질의 매우 높은 탄성강도로 인하여 절곡부(10)에 대한 포밍(forming)작업이 종료된 후에도 가상선과 같이 포밍전의 상태로 복귀하려는 스프링백(spring back)현상이 극히 높아 새도우마스크(S)의 제작불량이 속출하는 문제점이 있었다.In order to prevent this, in recent years, as shown in FIG. 1, an invar material shadow mask (S) having a very low thermal expansion coefficient has been manufactured and used, but when the shadow mask (S) is formed from this invar material, this material is used. Due to the very high elastic strength of the spring (b) to return to the state before the forming, such as a virtual line even after the forming (finished) for the bending portion 10 is extremely high, the manufacturing failure of the shadow mask (S) There was this following issue.

따라서, 본 발명의 목적은 이러한 종래의 문제점을 감안하여 안출한 것으로서, 복수의 전자빔통과공이 천공된 인바아재질의 평판마스크주변의 절곡부만을 소정시간 열처리하여 소성시킨 다음, 이 절곡부를 프레스장치로 포밍가공함으로써, 전술한 절곡부의 스프링백현상으로 인한 새도우마스크의 불량을 극소화시킨 브라운관의 새도우마스크제작방법을 제공함에 있다.Therefore, an object of the present invention is devised in view of the above-described conventional problems, and heats only a bent portion around a flat plate mask of an in-bar material in which a plurality of electron beam through holes are perforated for a predetermined time, and then fires the bent portion with a press apparatus. The present invention provides a method for producing a shadow mask of a CRT tube by minimizing the defect of the shadow mask due to the spring back phenomenon of the bent portion.

이와 같은 목적을 달성하기 위하여 본 발명은 복수의 전자빔통과공이 천공된 평판마스크를 형성한 다음, 이 주변의 절곡부에 해당되는 부분을 약 700도에서 800도 사이로 열처리하되, 이 열처리를 약 20분에서 40분정도 실시하는 한편, 전술한 절곡부의 열처리가 종료됨과 동시에 이 부분을 프레스장치로 포밍가공하여서 된 특징이 있다.In order to achieve the above object, the present invention forms a flat plate perforated with a plurality of electron beam through holes, and then heat-treat the portion corresponding to the bent portion at about 700 to 800 degrees, and the heat treatment is performed for about 20 minutes. 40 minutes at the same time, while the heat treatment of the above-mentioned bent portion is finished, this part is characterized by forming the part by pressing apparatus.

이하, 본 발명의 바람직한 일실시예를 첨부도면에 의거하여 상세히 설명한다.Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

제2도는 본 발명에 따른 평판마스크의 평면도로서, 복수의 전자빔통과공(2)이 천공되면서 탄성강도가 극히 높은 인바아재질로 된 평판마스크(1) 주변, 즉 프레스장치(미도시)에 의해 꺾여지는 절곡부(10)만 약 700도에서 800도 사이로 30분 동안 열처리하게 되는데, 상기 절곡부(10)를 700도에서 800도 사이로 열처리하는 이유는 평판마스크(1)를 형성하고 있는 인바아재질이 재결정을 시작하는 온도가 약 650도 가량이기 때문이다.FIG. 2 is a plan view of a flat plate mask according to the present invention, in which a plurality of electron beam through holes 2 are perforated, and the periphery of the flat plate mask 1, which is made of an invar material having a very high elastic strength, that is, by a press device (not shown) Only the bent portion 10 to be bent is heat treated for about 30 minutes between about 700 degrees and 800 degrees, and the reason for heat-treating the bent portion 10 between 700 degrees and 800 degrees is an invar forming the plate mask 1. This is because the temperature at which the material starts recrystallization is about 650 degrees.

이렇게 평판마스크(1)의 절곡부(10)에 열처리가 완료되고나면, 이 평판마스크(1)의 절곡부(10)를 프레스장치로 포밍가공하여 제3도와 같이 새도우마스크(S)를 완성한다.After the heat treatment is completed on the bent portion 10 of the flat plate mask 1, the bent portion 10 of the flat plate mask 1 is formed by a press device to complete the shadow mask S as shown in FIG. .

위에서 설명한 새도우마스크(S)의 제작방법은 본 발명의 가능한 실시예에 불과하며, 예컨대 전술한 평판마스크(1)의 절곡부(10)와 그 단부까지 소정시간 동안 열처리한 후 프레스장치로 포밍하여도 무방하며, 이외에도 앞서 설명한 본 발명의 범위내에서 얼마든지 그 변경이 가능하다.The manufacturing method of the shadow mask (S) described above is only a possible embodiment of the present invention, for example, the heat treatment for the predetermined time to the bent portion 10 and the end of the above-described flat plate mask (1) by forming a press device In addition, other modifications can be made within the scope of the present invention described above.

이와 같이 본 발명은 새도우마스크(S)형성시, 평판마스크(1)주변의 절곡부(10)만 약 700도에서 800도 사이로 약 30분 동안 열처리하여 이 부분을 소성변형시킨 후 전술한 절곡부(10)부분이 절곡되도록 평판마스크(1)를 프레스가공하여 하나의 새도우마스크(S)를 형성한다.As described above, in the present invention, when the shadow mask S is formed, only the bent portion 10 around the flat plate mask 1 is subjected to heat treatment for about 30 minutes at about 700 to 800 degrees to plastically deform this portion, and then the bent portion described above. (10) the flat plate mask (1) to be bent to form one shadow mask (S).

전술한 바와 같이 본 발명은 복수의 전자빔통과공이 천공된 인바아재질의 평판마스크(1)주변의 절곡부(10)만을 소정시간 열처리하여 소성변형시킨 다음, 이 절곡부(10)를 프레스장치로 포밍가공함으로써, 전술한 절곡부(10)의 스프링백현상으로 인한 새도우마스크(S)의 불량을 극소화시킨 효과가 있다.As described above, the present invention heat-treats only the bending portion 10 around the in-plane plate mask 1 made of a plurality of electron beam through holes for a predetermined time, and then plastically deforms the bending portion 10 by a press apparatus. By the forming process, there is an effect of minimizing the failure of the shadow mask (S) due to the spring back phenomenon of the above-mentioned bent portion (10).

Claims (2)

복수의 전자빔통과공(2)이 천공되면서 탄성강도가 높은 인바아재질로 된 평판마스크(1)주변, 즉 프레스장치(미도시)에 의해 꺽여지는 절곡부(10)를 소정시간 고온으로 소성시킨 다음, 상기 절곡부(10)를 프레스장치로 포밍가공하는 것을 특징으로 한 브라운관의 새도우마스크제작방법.As the plurality of electron beam through holes 2 are drilled, the plate mask 1, which is made of an in-var material having high elastic strength, is fired at a high temperature for a predetermined time, that is, the bent portion 10 that is bent by a press device (not shown). And then forming the bent portion (10) with a press device to produce a shadow mask of the CRT. 제1항에 있어서, 상기한 절곡부(10)에 소정시간 열처리가공하되, 상기 절곡부(10)를 약 700- 800도 사이에서 20분- 40분동안 열처리하는 것을 특징으로 한 브라운관의 새도우마스크제작방법.The shadow mask of claim 1, wherein the bent portion 10 is heat-treated for a predetermined time, and the bent portion 10 is heat treated for about 20 to 40 minutes between about 700 to 800 degrees. How to make.
KR1019940023472A 1994-09-15 1994-09-15 Cathode ray tube KR0164884B1 (en)

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