KR19980021649A - Black layer coating structure of shadow mask - Google Patents

Black layer coating structure of shadow mask Download PDF

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Publication number
KR19980021649A
KR19980021649A KR1019960040578A KR19960040578A KR19980021649A KR 19980021649 A KR19980021649 A KR 19980021649A KR 1019960040578 A KR1019960040578 A KR 1019960040578A KR 19960040578 A KR19960040578 A KR 19960040578A KR 19980021649 A KR19980021649 A KR 19980021649A
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KR
South Korea
Prior art keywords
shadow mask
coating structure
layer coating
asbestos
blackening layer
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Application number
KR1019960040578A
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Korean (ko)
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KR100224969B1 (en
Inventor
김대수
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구자홍
엘지전자 주식회사
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Priority to KR1019960040578A priority Critical patent/KR100224969B1/en
Publication of KR19980021649A publication Critical patent/KR19980021649A/en
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Publication of KR100224969B1 publication Critical patent/KR100224969B1/en

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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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/07—Shadow masks
    • H01J2229/0727—Aperture plate
    • H01J2229/0777—Coatings
    • H01J2229/0783—Coatings improving thermal radiation properties

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  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

본 발명은 새도우 마스크의 흑화층 코팅구조에 관한 것으로 특히 도밍현상을 해결 하고자 함에 그 목적이 있다.The present invention relates to a blackening layer coating structure of the shadow mask, and particularly has an object to solve the doming phenomenon.

본 발명의 구성은 칼라브라운관의 새도우 마스크에 흑화층위에 산화규소계의 하나인 석면을 코팅한 칼라브라운관과 석면 슬러리를 석면(Si.02) 10wt%이하, 용매로 알콜 60∼80wt%, 안정화제로 글리콜에테르 10∼30wt%, H2o 10wt%이하로 된 것을 특징으로 하는 새도우마스크의 흑화층 코팅구조.The composition of the present invention is asbestos (Si.0 2 ) 10wt% or less asbestos (Si.0 2 ) color brown tube and asbestos slurry coated with silicon oxide-based asbestos on the blackening layer on the shadow mask of the color brown tube, alcohol 60 ~ 80wt%, stabilization The blackening layer coating structure of the shadow mask characterized by the following: 10 to 30 wt% of zero glycol ether and 10 wt% or less of H 2 O.

Description

새도우 마스크의 흑화층 코팅구조Blackening layer coating structure of shadow mask

제1도는 칼라브라운관의 단면도.1 is a cross-sectional view of the color-brown tube.

제2도는 새도우 마스크 단면의 상세도.2 is a detailed view of the shadow mask cross section.

도면의 주요부분에 대한 부호의 설명Explanation of symbols for main parts of the drawings

100 : 새도우 마스크 101 : 흑화층100: shadow mask 101: blackening layer

102 : 비스무스층102: bismuth layer

본 발명은 칼라브라운관의 새도우 마스크의 흑화층코팅구조에 관한 것으로, 특히 도밍(doming)현상을 해결하고자 함에 그 목적이 있다.The present invention relates to a blackening layer coating structure of a shadow mask of a color brown tube, and an object thereof is particularly to solve a doming phenomenon.

종래의 통상적인 칼라브라운관은 제1도에서처럼 전방의 판넬(1), 중간부의 펀넬(2), 후방부의 네크(3)에 의해 구성되어 있고, 판넬 내면에는 적, 녹, 청의 스트라이프(stripe) 또는 도트(dot)의 형광체로 형성되어 있다.A conventional color-brown tube is composed of a front panel 1, a middle funnel 2, a rear neck 3 as shown in FIG. 1, and a red, green, and blue stripe on the inner surface of the panel. It is formed of a dot phosphor.

네크부에는 전자빔을 방출하는 전자총(4)이 설치되고, 또한 형광체 스크린에 근접 대향한 위치에는 다수의 슬롯(slot), 또는 도트(dot)형상의 개공을 가진 새도우 마스크(5)가 프레임(6)에 의해 지지 고정되어 있다.The neck portion is provided with an electron gun 4 for emitting an electron beam, and a shadow mask 5 having a plurality of slots or dots openings is provided at a position close to the phosphor screen. It is supported and fixed by).

위의 프레임은 스프링(8)을 매체로 하여 판넬의 내벽에 고정된 스터드 펀(studpin)에 고정되어 있고, 펀넬의 외부에는 편향요크(7)가 결합되어 있다.The upper frame is fixed to a stud pin fixed to the inner wall of the panel using the spring 8 as a medium, and a deflection yoke 7 is coupled to the outside of the funnel.

위의 전자총(4)에서 방출되는 전자빔은 편향되어 새도우마스크의 개공을 통과하여 형광체를 때려 화상이 재현하도록 되어 있다.The electron beam emitted from the electron gun 4 is deflected, passes through the opening of the shadow mask, and strikes the phosphor to reproduce the image.

이때 새도우 마스크의 개공이외의 부위를 때린 전자빔으로 인해 마스크는 가열, 팽창이 되어 도밍(doming)현상이 발생하게 된다.At this time, the mask is heated and expanded due to the electron beam striking a portion other than the opening of the shadow mask, thereby causing a doming phenomenon.

이 같은 도밍현상으로 새도우 마스크와 스크린간의 간격이 변화되어 전자빔의 정확한 랜딩(landing)이 어려워져, 색순도 저하를 일으킨다.This doming phenomenon changes the distance between the shadow mask and the screen, making accurate landing of the electron beam difficult, resulting in color purity degradation.

위의 도밍(doming)현상을 방지하기 위해 제2도에서 처럼 새도우마스크위에 흑화막(Fe2o4/Fe204)을 형성하여 복사열을 크게 하거나, 흑화막위에 다시 산화비스무스(Bi203)같은 전자빔의 복사율을 높이는 물질을 5㎛정도 스프레이 코팅하여 도밍현상을 개선시키고있다.To prevent the above doming phenomenon, as shown in FIG. 2, a blackening film (Fe 2 o 4 / Fe 2 0 4 ) is formed on the shadow mask to increase radiant heat, or bismuth oxide (Bi 2 0) on the blackening film again. 3 ) Spraying the same material that increases the e-radiation of the same electron beam about 5㎛ improves the doming phenomenon.

그러나, 위의 기술은 도밍량에 대한 개선이 20%하의 낮은 수준에 그치고 있어 알루미늄 킬드 강(AK steel)을 사용하는 새도우 마스크에는 색순도 저하가 여전히 문제로되어 있다.However, the above technique is only 20% lower than the improvement in the amount of dominance, and the color purity is still a problem in the shadow mask using aluminum AK steel.

위와 같은 종래의 기술은 여러가지 문제점이 많으므로 이를 개선 보완하기 위해서 본 발명을 창작하게 된 것으로써 이를 첨부된 도면 제2도에 의거하여 상세히 설명하면 다음과 같다.Since the prior art as described above has many problems, it will be described in detail with reference to FIG.

종전의 기술은 새도우 마스크(100)의 흑화층(101)위에 전자빔을 마스크 표면에서 반사시켜 마스크 온도상승을 억제하는 기능을 가진 산화비스무스(Bi203)(l02)를 5㎛로 코팅하여 마스크 온도상승을 억제하도록 하였다.Conventional technology is a mask by coating a bismuth oxide (Bi 2 0 3 ) (022) having a function of suppressing the mask temperature rise by reflecting the electron beam on the blackening layer 101 of the shadow mask 100 to 5㎛ Temperature rise was suppressed.

그러나, 비스무스(Bismuth)는 복사율이 0.7정도로 알루미늄 킬드 강(AK steel)을 사용한 마스크의 도밍(doming)성능을 완전히 만족시켜주지 못하므로 이에 대한 개선을 할 필요가 있다.However, bismuth (Bismuth) does not fully satisfy the doming performance of the mask using aluminum-killed steel (AK steel) with an emissivity of about 0.7, so there is a need for improvement.

그래서, 본 발명에서는 복사율을 향상시키기 위해 산화규소(Si02)계의 하나인 석면을 사용한다.Therefore, in the present invention, asbestos, which is one of silicon oxide (Si0 2 ) systems, is used to improve the emissivity.

산화규소는 복사율이 0.95정도로써 비스무스코팅시의 도밍성능보다 약 30%정도 더 개선 효과가 있다.Silicon oxide has an emissivity of about 0.95, which is about 30% better than the bismuth coating.

스프레이코팅하기 위한 산화규소슬러리(slurry)의 물성은 다음과 같다.The physical properties of silicon oxide slurry for spray coating are as follows.

표 1 2 Table 1 2

Claims (2)

칼라브라운관의 새도우 마스크에 흑화층위에 산화규소계의 하나인 석면슬러리를 코팅한 것을 특징으로 한 새도우마스크의 흑화층코팅구조.The blackening layer coating structure of the shadow mask, characterized by coating asbestos slurry, which is one of silicon oxide, on the blackening layer on the shadow mask of the color brown tube. 제1항에 있어서, 상기 석면 슬러리는 석면(Si.02) 10wt%이하, 용매로 알콜 60∼80wt%, 안정화제로 글리콜에테르 10∼30wt%, 물 10wt%이하로 조정된 것을 특징으로 하는 새도우마스크에 흑화층코팅구조.The shadow of claim 1, wherein the asbestos slurry is adjusted to 10% by weight or less of asbestos (Si.0 2 ), 60 to 80% by weight of alcohol as a solvent, 10 to 30% by weight of glycol ether as a stabilizer, and 10% by weight or less of water. Blackening layer coating structure on mask.
KR1019960040578A 1996-09-18 1996-09-18 Shadow mask for cathode ray tube KR100224969B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019960040578A KR100224969B1 (en) 1996-09-18 1996-09-18 Shadow mask for cathode ray tube

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Application Number Priority Date Filing Date Title
KR1019960040578A KR100224969B1 (en) 1996-09-18 1996-09-18 Shadow mask for cathode ray tube

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KR19980021649A true KR19980021649A (en) 1998-06-25
KR100224969B1 KR100224969B1 (en) 1999-10-15

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