KR100342040B1 - Cathode ray tube having high-brightness - Google Patents

Cathode ray tube having high-brightness Download PDF

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Publication number
KR100342040B1
KR100342040B1 KR1019950036045A KR19950036045A KR100342040B1 KR 100342040 B1 KR100342040 B1 KR 100342040B1 KR 1019950036045 A KR1019950036045 A KR 1019950036045A KR 19950036045 A KR19950036045 A KR 19950036045A KR 100342040 B1 KR100342040 B1 KR 100342040B1
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South Korea
Prior art keywords
cathode ray
ray tube
panel
coated
weight percent
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KR1019950036045A
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Korean (ko)
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KR970023580A (en
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박기서
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삼성에스디아이 주식회사
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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
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/18—Luminescent screens
    • H01J29/20—Luminescent screens characterised by the luminescent material
    • 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
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/18—Luminescent screens
    • H01J29/26—Luminescent screens with superimposed luminescent layers
    • 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
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/18—Luminescent screens
    • H01J29/28—Luminescent screens with protective, conductive or reflective layers
    • 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
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/18—Luminescent screens
    • H01J29/30—Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines
    • H01J29/32—Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines with adjacent dots or lines of different luminescent material, e.g. for colour television
    • H01J29/327—Black matrix materials

Abstract

PURPOSE: A cathode ray tube having high brightness is provided to prevent a lowering phenomenon of a reflection factor of a phosphor layer formed on a panel and improve contrast by using a carbon-coated phosphor. CONSTITUTION: A cathode ray tube(1) includes a phosphor layer(3) having transmissivity of 85 to 95 percent. A panel(2) is formed with silicon dioxide. A black coating composition is coated on an outer surface of the panel(2). The phosphor layer(3) is formed with a phosphor coated with carbon. The black coating composition is formed with alkyl silicate of 28 to 40 weight percent, black dye of 0.1 to 0.5 weight percent, metallic particles of 10 to 20 weight percent, and solvent of the remaining weight percent. The metallic particles are formed with an element selected from a group including antimony, stannum, and oxide thereof. The solvent is formed with one or more elements selected from a group including isopropyl alcohol, methanol, ethanol, butanol, and deionized water.

Description

고휘도 음극선관High brightness cathode ray tube

본 발명은 고휘도 음극선관에 관한 것으로서, 상세하기로는 콘트라스트 특성이 양호하면서 특히 휘도 특성이 우수한 음극선관에 관한 것이다.The present invention relates to a high-brightness cathode ray tube, and more particularly, to a cathode ray tube having good contrast characteristics and particularly excellent luminance characteristics.

일반적으로 음극선관 (1)은 제1도에 도시된 바와 같이 투명창으로서 화면의 재생시에 영상을 재생하는 스크린면 (2a)를 가진 패널 (2)과, 상기 스크린면의 내면에 형성된 소정 패턴의 형광막 (3)과, 패널 (2)의 내부에 설치되는 새도우 마스크 프레임 조립체 (5), 상기 패널 (2)와 봉착되어 음극선관의 외용기를 형성하며네크부에 전자총 (4)가 설치된 펀넬 (6)과, 이 펀넬의 콘부 (6a)에 설치되는 편향요오크 (8)을 구비한다.Generally, the cathode ray tube 1 is a transparent window, as shown in FIG. 1, of a panel 2 having a screen surface 2a for reproducing an image upon reproduction of a screen, and a predetermined pattern formed on an inner surface of the screen surface. A funnel having a fluorescent film 3, a shadow mask frame assembly 5 installed inside the panel 2, the panel 2 being sealed to form an outer container of a cathode ray tube, and an electron gun 4 installed at the neck portion. (6) and a deflection yoke 8 provided in the cone portion 6a of this funnel.

이와 같이 구성된 음극선관은 전자총 (4)로부터 방출된 전자빔이 편향요오크 (8)에 의해 주사위치에 따라 선택적으로 편향되어 형광막 (3)에 주사됨으로써 각각의 형광체를 여기시켜 화상을 형성하게 된다. 이와 같이 형성된 화상을 시청하는 시청자는 패널의 내면에 형성된 형광막이 발광함으로써 이루어지는 화면을 시청하는 것이라고 말할 수 있다.The cathode ray tube configured as described above is selectively deflected by the deflection yoke 8 according to the dice by the deflection yoke 8 to be scanned into the fluorescent film 3 to excite each phosphor to form an image. . The viewer who views the image thus formed may say that the viewer views the screen formed by the light emission of the fluorescent film formed on the inner surface of the panel.

그런데 영상이 재생되는 상기 패널의 외면은 일반적으로 매끄러운 유리면으로 되어 있어 주위로부터 입사되는 광이 정반사되므로 형광막의 발광에 의해 형성된 화면의 휘도가 상대적으로 저하되는 현상이 나타난다. 즉, 외광이 패널의 외면에 입사되면 패널의 외표면에 외광에 의한 잔상이 형성되므로 재생된 화면과 잔상이 중첩되어 휘도가 저하되는 것이다.However, since the outer surface of the panel on which the image is reproduced is generally a smooth glass surface, since the light incident from the surroundings is specularly reflected, the phenomenon that the brightness of the screen formed by the emission of the fluorescent film is relatively lowered appears. That is, when external light is incident on the outer surface of the panel, afterimages are generated on the outer surface of the panel by the external light, so that the reproduced screen and the afterimage overlap and the luminance is lowered.

종래 음극선관의 패널로서 삼성코닝사 제품의 세미틴트(SEMITINT)를 주로 사용하였는데, 이 패널은 투과율이 53%이고 유리재질이다. 이 패널을 채용한 음극선관의 경우, 화면의 콘트라스트는 양호하지만 휘도가 저하된다.Conventionally, a semi-tint manufactured by Samsung Corning Co., Ltd. was used as a panel of a cathode ray tube. The panel has a transmittance of 53% and is made of glass. In the case of the cathode ray tube employing this panel, the contrast of the screen is good but the luminance is lowered.

상기 문제점을 해결하여 본 발명에서는 투과율이 85 내지 95%이고, 재질이 이산화규소인 패널 외표면이 흑색 코팅조성물로 코팅되어 있고, 카본이 코팅된 형광제로 형성된 형광막을 채용하고 있는 것을 특징으로 하는 음극선관이 제공된다.In the present invention to solve the above problems, the transmittance is 85 to 95%, the outer surface of the panel of silicon dioxide material is coated with a black coating composition, a cathode film characterized in that it employs a fluorescent film formed of a carbon-coated fluorescent agent A tube is provided.

상기 흑색 코팅조성물은 알킬 실리케이트(Si(OR)4, 여기에서 R은 탄소수 1내지 5의 알킬기이다) 28내지 40중량%, 흑색 염료 0.1내지 0.5중량%, 금속 미립자 10내지 20중량% 및 그 나머지 양의 용매를 포함한다.The black coating composition is an alkyl silicate (Si (OR) 4 , where R is an alkyl group having 1 to 5 carbon atoms) 28 to 40% by weight, 0.1 to 0.5% by weight of black dye, 10 to 20% by weight of the metal particles Amount of solvent.

상기 흑색 염료로는 블랙 X51(독일 BASF사) 등이 있고, 상기 금속 미립자는 안티몬, 주석 및 그 산화물중에서 선택된다. 이중에서 특히 산화주석이 바람직하다.The black dye includes black X51 (BASF, Germany) and the like, and the metal fine particles are selected from antimony, tin and oxides thereof. Of these, tin oxide is particularly preferable.

본 발명에서 사용가능한 용매로는 이소프로필 알콜, 메탄올, 에탄올, 부탄올 및 순수로 구성된 군으로부터 선택되는 적어도 하나이다.The solvent usable in the present invention is at least one selected from the group consisting of isopropyl alcohol, methanol, ethanol, butanol and pure water.

본 발명에서는 음극선관의 패널로 삼성코닝사 제품인 클리어(CLEAR)를 사용하는데, 이 패널은 종래의 세미틴트 패널에 비하여 투과율이 커서 휘도를 개선시킬 수 있으며, 패널 외표면을 검은 색으로 코팅하고 카본이 코팅된 형광체를 사용함으로써 패널에 형성된 형광막 자체의 반사율 저하를 방지할 수 있고 콘트라스트를 개선할 수 있다.In the present invention, as a cathode ray tube panel, Samsung Corning Co., Ltd. (CLEAR) is used as a panel, which has a higher transmittance compared to the conventional semi-tint panel to improve the brightness, the outer surface of the panel is coated with black and carbon By using the coated phosphor, it is possible to prevent a decrease in reflectance of the fluorescent film itself formed on the panel and to improve contrast.

이하, 본 발명을 실시예를 들어 상세히 설명하기로 하되, 본 발명이 이에 한정되는 것은 아니다.Hereinafter, the present invention will be described in detail with reference to Examples, but the present invention is not limited thereto.

(실시예)(Example)

에틸 실리케이트 15중량%, 검은 색 염료인 블랙 X51 1중량%, 안티몬이 첨가된 산화주석 10중량% 및 그 나머지 양의 메탄올, 이소프로필 알콜 및 부탄올의 혼합용매를 함유하는 코팅조성물을 숙성시킨 다음, 이를 세정된 클리어 패널 외표면에 스프레이 코팅하였다.Aging coating composition containing 15% by weight of ethyl silicate, 1% by weight of black X51 as a black dye, 10% by weight of tin oxide with antimony and a mixed solvent of methanol, isopropyl alcohol and butanol was added thereto. It was spray coated onto the cleaned clear panel outer surface.

통상의 방법으로 카본이 코팅된 형광체를 제조한 후, 이를 음극선관 패널 내면에 도포하고 새도우 마스크를 통하여 소정부위만을 노광처리한 다음 비노광부를 세척하여 현상함으로써, 스트라이프상 또는 도트상의 형광막을 형성하였고, 일반적인 방법에 따라 음극선관을 제조하였다.After manufacturing a carbon-coated phosphor by a conventional method, it was applied to the inner surface of the cathode ray tube panel, exposed only a predetermined portion through a shadow mask, and then washed to develop a non-exposed portion to form a striped or dot-shaped fluorescent film. , A cathode ray tube was manufactured according to a general method.

(비교예 1)(Comparative Example 1)

카본이 코팅되지 않은 형광체를 사용한 것을 제외하고는, 실시예와 동일한 방법으로 실시하였다.The same procedure as in Example was carried out except that phosphors not coated with carbon were used.

(비교예 2)(Comparative Example 2)

음극선관의 패널로 세미틴트를 사용한 것을 제외하고는, 실시예와 동일한 방법으로 실시하였다.The same procedure as in Example was conducted except that semitint was used as the panel of the cathode ray tube.

상기 실시예 및 비교예에서 제조한 음극선관을 사용하여 색좌표 및 휘도를 측정하였다.Color coordinates and luminance were measured using the cathode ray tubes manufactured in the above Examples and Comparative Examples.

(표 1)Table 1

표 1로부터, 상기 실시예의 경우는 비교예 1-2의 경우보다 색좌표가 넓어 콘트라스트가 향상되었음을 알 수 있다. 또한 휘도도 녹색(G), 청색(B) 및 적색(R)의경우 모두가 향상됨을 알 수 있다.From Table 1, it can be seen that the color coordinates are wider than in the case of Comparative Example 1-2, and the contrast is improved. In addition, it can be seen that the luminance is also improved in the case of green (G), blue (B) and red (R).

본 발명에 의하면, 투과율이 높은 패널 외표면을 검은 색을 코팅하고, 카본이 코팅된 형광체로 형성된 형광막을 채용함으로써 콘트라스트 및 휘도가 개선된 음극선관을 제조할 수 있다.According to the present invention, a cathode ray tube with improved contrast and brightness can be manufactured by coating a black outer surface of a panel having high transmittance and employing a fluorescent film formed of a carbon coated phosphor.

제1도는 일반적인 음극선관의 단면도이다.1 is a cross-sectional view of a typical cathode ray tube.

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

1. 음극선관 2. 패널1. cathode ray tube 2. panel

2a. 스크린면 3. 형광막2a. Screen 3. Fluorescent Film

4. 전자총 5. 새도우마스크 프레임 조립체4. Electron gun 5. Shadow mask frame assembly

6. 펀넬 6a. 펀넬 콘부6. Funnel 6a. Funnel Cornu

7. 편향 요오크7. Deflection yoke

Claims (4)

투과율이 85 내지 95%이고, 재질이 이산화규소인 패널 외표면이 흑색 코팅조성물로 코팅되어 있고, 카본이 코팅된 형광체로 형성된 형광막을 채용하고 있는 것을 특징으로 하는 음극선관.A cathode ray tube, characterized in that a fluorescent film formed of a carbon-coated phosphor is used, wherein the panel outer surface having a transmittance of 85 to 95% and a material of silicon dioxide is coated with a black coating composition. 제1항에 있어서, 상기 흑색 코팅조성물이 알킬 실리케이트(Si(OR)4, 여기에서 R은 탄소수 1내지 5의 알킬기이다) 28내지 40중량%, 흑색 염료 0.1내지 0.5중량%, 금속 미립자 10내지 20중량% 및 그 나머지 양의 용매를 포함하는 것을 특징으로 하는 음극선관.The method of claim 1, wherein the black coating composition is an alkyl silicate (Si (OR) 4 , wherein R is an alkyl group having 1 to 5 carbon atoms) 28 to 40% by weight, black dye 0.1 to 0.5% by weight, metal fine particles 10 to A cathode ray tube, characterized in that it comprises 20% by weight and the remaining amount of the solvent. 제2항에 있어서, 상기 금속 미립자가 안티몬, 주석 및 그 산화물로 이루어진 군으로부터 선택되는 것을 특징으로 하는 음극선관.The cathode ray tube according to claim 2, wherein the metal fine particles are selected from the group consisting of antimony, tin and oxides thereof. 제2항에 있어서, 상기 용매가 이소프로필 알콜, 메탄올, 에탄올, 부탄올 및 순수로 이루어진 군으로부터 선택되는 적어도 하나인 것을 특징으로 하는 음극선관.The cathode ray tube according to claim 2, wherein the solvent is at least one selected from the group consisting of isopropyl alcohol, methanol, ethanol, butanol and pure water.
KR1019950036045A 1995-10-18 1995-10-18 Cathode ray tube having high-brightness KR100342040B1 (en)

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KR100360189B1 (en) * 2000-01-29 2002-11-08 가부시키가이샤 히타치세이사쿠쇼 Color cathode ray tube

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