KR910003811B1 - Color cathode ray tube - Google Patents

Color cathode ray tube Download PDF

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Publication number
KR910003811B1
KR910003811B1 KR1019880017338A KR880017338A KR910003811B1 KR 910003811 B1 KR910003811 B1 KR 910003811B1 KR 1019880017338 A KR1019880017338 A KR 1019880017338A KR 880017338 A KR880017338 A KR 880017338A KR 910003811 B1 KR910003811 B1 KR 910003811B1
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South Korea
Prior art keywords
film
cathode ray
ray tube
shadow mask
color cathode
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KR1019880017338A
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Korean (ko)
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KR900010892A (en
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이주화
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삼성전관 주식회사
김정배
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/10Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/18Luminescent screens
    • H01J29/28Luminescent screens with protective, conductive or reflective layers

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  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Abstract

The screen of the colour CRT for preventing the doming effect of the shadow mask caused by the radiant heat of the screen is deposited the magnesium oxide layer (M) on the aluminium deposited layer (A), so that the radiant heat of the screen is absorbed at the layer (M) and the electron beam is bypassed well.

Description

칼라음극선관Color cathode ray tube

제 1 도는 본 발명에 따른 음극선관의 개략적 단면도.1 is a schematic cross-sectional view of a cathode ray tube according to the present invention.

제 2 도는 제 1 도의 A부분의 확대도.2 is an enlarged view of a portion A of FIG.

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

B : 블랙매트릭스 C : 알미늄증착막B: black matrix C: aluminum deposition film

E : 형광막 F : 펀넬E: fluorescent film F: funnel

G : 섀도우마스크 M : 산화마그네슘막G: shadow mask M: magnesium oxide film

본 발명은 전자총으로부터의 빔이 도달함으로써 화상이 나타나는 칼라음극선관에 관한 것으로서, 특히 섀도우마스크로의 열복사량이 크게 감소되어 섀도우마스크의 도밍현상이 최대한으로 억제될 수 있도록 된 것에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color cathode ray tube in which an image appears when a beam from an electron gun arrives. In particular, the amount of heat radiation to a shadow mask is greatly reduced so that the dominant phenomenon of the shadow mask can be suppressed to the maximum.

칼라음극선관의 섀도우마스크가 전자빔과 이에 의한 열에 의해 열변형하게 되면 스크린면에서의 색순도가 불량하게 되는데, 섀도우마스크의 열변형에 의한 도밍현상을 가능한 줄이기 위한 대책들이 마련되어야 한다.When the shadow mask of the color cathode ray tube is thermally deformed by the electron beam and heat, the color purity on the screen surface is poor, and measures to reduce the ming phenomenon caused by the thermal deformation of the shadow mask should be provided.

이를 위하여 종래에는 알미늄증착막의 표면에 흑연을 도포하여 인근으로부터의 복사열을 흡수하여 섀도우마스크에 과열되지 못하도록 하거나, 경우에 따라서는 형광막의 윗층에 도포되는 상기 알미늄을 증착하는 공정에서 이를 산화시켜서 알미늄표면에 흑화층(산화알미늄층)을 형성하여 열복사를 저감시키고 있다. 이러한 종래의 방법에 있어서 전기의 방법 즉, 흑연막을 도포하는 방법은 알미늄막에 핀홀(Pin hole)이나 균열이 발생되어 있는 경우 이를 통하여 흑연이 형광막으로 침투할 위험부담을 안고 있으며, 후자의 경우에는 알미늄을 증착한 후 이를 산화처리를 해야되므로 고진공과 저진공의 2중 증착 기술이 필요한 번거러움을 가지는 한편, 산화처리를 위하여 고진공에서 저진공으로 분위기 변경하게 되면 이에 의해 와류가 발생되므로 일정 두께의 증착면을 형성하기에 어려우며 아울러 증착면이 산화되는 과정에서 증착재료(Al)를 가열하는 히이터도 같이 산화됨으로써 히이터의 손실이 매우 크다.To this end, conventionally, graphite is coated on the surface of the aluminum deposition film to absorb radiant heat from the neighborhood so as not to be overheated in the shadow mask, or in some cases, by oxidizing it in the process of depositing the aluminum applied on the upper layer of the fluorescent film. The blackening layer (aluminum oxide layer) is formed in this, and heat radiation is reduced. In the conventional method, that is, the method of applying the graphite film has a risk of graphite penetrating into the fluorescent film through pin holes or cracks in the aluminum film. In order to oxidize the aluminum after depositing it, it has the hassle that a double deposition technique of high vacuum and low vacuum is required. On the other hand, when the atmosphere is changed from high vacuum to low vacuum for oxidation treatment, vortices are generated. It is difficult to form the deposition surface, and the heater that heats the deposition material Al in the process of oxidizing the deposition surface is also oxidized, so the loss of the heater is very large.

본 발명은 이러한 제문제점을 개선할 수 있는 칼라음극선관을 제공함에 그 목적이 있다.It is an object of the present invention to provide a color cathode ray tube that can improve these problems.

상기의 목적을 달성하기 위하여 본 발명은 패널과 퍼널로 된 관구체와 전자빔을 형성 발사하는 전자총, 이로부터의 전자빔을 받아 화상을 나타내도록 블랙매트릭스, 형광막, 알미늄증착막으로된 스크린면을 구비한 것으로서 상기 알미늄증착막의 표면에 산화마그네슘막을 형성하여서 된 점에 특징이 있다.In order to achieve the above object, the present invention provides a panel and a funnel tube and an electron gun for forming and firing an electron beam, and having a screen surface made of a black matrix, a fluorescent film, and an aluminum deposition film to receive an image from the electron beam therefrom. It is characterized in that a magnesium oxide film is formed on the surface of the aluminum deposition film.

이하 도면을 참조하면서 본 발명을 더욱 상세히 설명한다. 제 1 도, 제 2 도에 도시된 바와 같이 섀도우마스크(G)를 통과하여 스크린면(S)에 도달된 전자들은 바이패스시키기 위한 금속막이 형성되어 있는 바, 제1층에 알미늄증착막(A)이, 제2층에 산화마그네슘증착막(M)이 형성된다. 이의 형성공정은 통상의 증착공정으로 가능한 바, 하나의 증착로내에서 알미늄막과 마그네슘막을 그 순서대로 증착형성할 수도 있고, 경우에 따라서는 별도의 증착로에서 각각 증착형성할 수도 있다. 이때에 마그네슘막은 아직 산화되지 않은 상태로서 후속되는 산화처리공정을 통하여 흑화처리한다.Hereinafter, the present invention will be described in more detail with reference to the drawings. As shown in FIGS. 1 and 2, a metal film is formed to bypass electrons that pass through the shadow mask G and reach the screen surface S. An aluminum deposition film A is formed on the first layer. Magnesium oxide deposited film M is formed in this 2nd layer. It is possible to form the aluminum film and the magnesium film in the order of the deposition in one deposition furnace, and in some cases, may be formed separately in a separate deposition furnace. At this time, the magnesium film is not yet oxidized and blackened through a subsequent oxidation process.

이와 같이 형성된 두겹층의 금속막은 섀도우마스크를 통과한 전자빔이 블랙매트릭스사이의 형광막에 도달 될 수 있도록 허용함과 아울러 다시 접지단으로 바이패스시키는 역할을 충분히 수행함과 아울러 2층의 산화마그네슘막(M)에 섀도우마스크로의 복사열이 차단 흡수된다. 즉 산화마그네슘층은 알미늄막과 섀도우마스크사이에 개재되어 이들을 격리시키는 하나의 흑화층으로서 대부분의 알미늄층으로부터 발생된 복사열과 섀도우마스크로부터 반사된 복사열을 흡수할 수 있는 상태이며, 아울러 그 저층의 알미늄막과 함께 전자를 바이패스시키는 역할을 한다. 한편 이 산화마그네슘막 알미늄막과 같은 금속막층으로서 핀홀이나 균열이 발생되어도 형광막에 침투되거나 하지 않는다. 아울러 상기 산화마그네슘층은 섀도우마스크로부터의 복사열도 흡수하여서 섀도우마스크의 온도상승을 더욱 억제한다.The two-layer metal film formed as described above allows the electron beam passing through the shadow mask to reach the fluorescent film between the black matrices, and also serves to bypass the back to the ground end, and the two layers of magnesium oxide film ( M) blocks and absorbs radiant heat to the shadow mask. That is, the magnesium oxide layer is a blackening layer interposed between the aluminum film and the shadow mask to isolate them, and is capable of absorbing radiant heat generated from most aluminum layers and reflected heat reflected from the shadow mask. Together with the film serves to bypass electrons. On the other hand, even if pinholes or cracks are generated as a metal film layer such as the magnesium oxide film aluminum film, they do not penetrate into the fluorescent film. In addition, the magnesium oxide layer also absorbs radiant heat from the shadow mask to further suppress the temperature rise of the shadow mask.

이와 같이 본 발명은 결과적으로 섀도우마스크 열변형에 의한 색순도의 불량화를 크게 저감시키는 바, 좋은 화질을 가진 음극선관의 생산을 가능케 한다. 아울러 종래의 복사열흡수층을 형성할 때에 발생되는 전기한 모든 문제점이 개선됨으로써 경비절감과 아울러 제품의 고품질화를 가능케 한다.As described above, the present invention greatly reduces the deterioration of color purity due to the shadow mask thermal deformation, thereby enabling production of a cathode ray tube having good image quality. In addition, it is possible to reduce the cost as well as to improve the quality of the product by improving all the aforementioned problems generated when forming the conventional radiation heat absorbing layer.

Claims (1)

패널과 퍼널로된 밀폐관구체와, 전자빔을 조성일방향으로 발사하는 전자총, 이로부터의 전자빔을 받아 화상을 나타낼 수 있도록 블랙매트릭스, 형광막, 알미늄증착막 등으로 이루어진 스크린면을 구비한 것으로서, 상기 알미늄증착막(A)의 표면에 산화마그네슘막(M)을 형성하여서 인근의 복사열을 흡수할 수 있도록 함과 아울러 상기 알미늄증착막과 더불어 전자를 바이패스시키는 역할을 할 수 있도록 된 것을 특징으로 하는 칼라음극선관.It has an airtight tube made of a panel and a funnel, an electron gun which emits an electron beam in one direction, and a screen surface made of a black matrix, a fluorescent film, an aluminum deposition film, etc. to receive images from the electron beam. Color cathode ray tube, characterized in that to form a magnesium oxide film (M) on the surface of the deposition film (A) to absorb nearby radiant heat and to bypass electrons with the aluminum deposition film. .
KR1019880017338A 1988-12-23 1988-12-23 Color cathode ray tube KR910003811B1 (en)

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KR1019880017338A KR910003811B1 (en) 1988-12-23 1988-12-23 Color cathode ray tube

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KR900010892A KR900010892A (en) 1990-07-09
KR910003811B1 true KR910003811B1 (en) 1991-06-12

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