KR20030080769A - Cooling system of projection cathode ray tube - Google Patents

Cooling system of projection cathode ray tube Download PDF

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Publication number
KR20030080769A
KR20030080769A KR1020020019559A KR20020019559A KR20030080769A KR 20030080769 A KR20030080769 A KR 20030080769A KR 1020020019559 A KR1020020019559 A KR 1020020019559A KR 20020019559 A KR20020019559 A KR 20020019559A KR 20030080769 A KR20030080769 A KR 20030080769A
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South Korea
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cathode ray
ray tube
coupler body
cooling
coolant
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KR1020020019559A
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Korean (ko)
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강동현
김민호
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삼성에스디아이 주식회사
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Priority to KR1020020019559A priority Critical patent/KR20030080769A/en
Publication of KR20030080769A publication Critical patent/KR20030080769A/en

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00Cathode ray tubes; Electron beam tubes
    • H01J31/08Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/10Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/12Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
    • H01J31/123Flat display tubes
    • H01J31/124Flat display tubes using electron beam scanning
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00Details of cathode ray tubes or electron beam tubes
    • H01J2229/86Vessels and containers
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2329/00Electron emission display panels, e.g. field emission display panels
    • H01J2329/002Cooling means

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

Abstract

PURPOSE: A cooling device is provided to achieve improved cooling efficiency and prevent a degradation of luminance of a phosphor screen. CONSTITUTION: A cooling device comprises a coupler body(21) assembled to the front of a projection cathode ray tube(10); a coolant circulation pipe(27) wound along the coupler body; and a coolant filling the coupler body and the coolant circulation pipe. The cooling device cools the heat generated from a phosphor screen(12) of the projection cathode ray tube. The coolant circulation pipe is communicated to the coupler body.

Description

투사형 음극선관의 냉각장치{COOLING SYSTEM OF PROJECTION CATHODE RAY TUBE}Cooling system of projection cathode ray tube {COOLING SYSTEM OF PROJECTION CATHODE RAY TUBE}

본 발명은 고화질 텔레비젼에 사용되는 투사형 음극선관에 관한 것으로, 보다 상세하게는 투사형 음극선관을 냉각하는 개선된 냉각장치에 관한 것이다.The present invention relates to a projection type cathode ray tube used in high definition televisions, and more particularly to an improved cooling device for cooling a projection type cathode ray tube.

투사형 음극선관을 사용한 고화질 텔레비젼은 크기가 작고 내부에 섀도우 마스크가 없는 투사형 음극선관에 맺힌 상을 렌즈계를 통해 스크린으로 확대 투사하는 구조로 형성된다.High-definition televisions using projection cathode ray tubes are formed in a structure in which an image formed on a projection cathode ray tube having a small size and no shadow mask therein is enlarged and projected onto a screen through a lens system.

이러한 투사형 음극선관을 갖는 텔레비젼은 브라운관에 맺힌 상을 직접 보는 일반적인 직시형 텔레비젼과 달리 투사형 음극선관에서 발생하는 광 손실이 크므로 직시형 텔레비젼에 사용하는 음극선관에 비해 100배 이상의 전자빔의 조사가 요구된다.TVs with such projection type cathode ray tubes have a large light loss generated by projection type cathode ray tubes, unlike ordinary direct view televisions that directly see images formed on CRTs. do.

따라서, 상기한 투사형 음극선관은 페이스 패널(face panel)의 내면에 제공된 형광막의 열화가 심하게 발생된다. 또한, 렌즈계를 구성하는 플라스틱 렌즈가 열에 의한 수차변화를 발생시켜 컨버젼스 등의 특성 변화가 심하여 많은 문제점을 안고 있다. 이러한 문제점을 해결하기 위해, 공지의 투사형 음극선관에는 관 내부에서 발생하는 열을 냉각하기 위한 냉각장치를 필수적으로 구비하는데, 상기 냉각장치는 투사형 음극선관의 형광막 스크린 전면에 설치되는 커플러 몸체와, 몸체 내부에 채워져서 상기 형광막 스크린의 열을 흡수하는 냉각액을 포함한다.Therefore, in the projection type cathode ray tube, deterioration of the fluorescent film provided on the inner surface of the face panel is severely generated. In addition, the plastic lens constituting the lens system generates aberration changes due to heat, which causes severe changes in characteristics such as convergence. In order to solve this problem, a known projection cathode ray tube is essentially provided with a cooling device for cooling the heat generated inside the tube, the cooling device is a coupler body which is installed in front of the fluorescent film screen of the projection cathode ray tube, And a cooling liquid filled in the body to absorb heat of the fluorescent screen.

본 발명인의 실험 결과, 냉각장치를 갖지 않는 투사형 음극선관은 150∼160℃의 벌브 온도를 나타낸 반면에, 냉각장치를 갖는 투사형 음극선관은 65∼73℃의 벌브 온도를 나타냈으며, 이로 인한 형광막 휘도 열화는 냉각장치를 갖는 투사형 음극선관이 종래 대비 30∼40%정도 개선된 효과를 나타내었다.As a result of the experiments of the inventors, the projection cathode ray tube without a cooling device exhibited a bulb temperature of 150 to 160 ° C., whereas the projection cathode ray tube with a cooling device exhibited a bulb temperature of 65 to 73 ° C., resulting in a fluorescent film. The luminance deterioration showed an improvement of about 30 to 40% compared to the conventional projection type cathode ray tube having a cooling device.

그리고, 냉각 효율을 증가시키기 위해 최근에는 커플러 몸체 외면에 냉각 휜(fin)을 설치하여 방열 면적을 증가시킨 냉각장치를 주로 사용하였다.In order to increase the cooling efficiency, recently, a cooling device in which a cooling fin is installed on the outer surface of the coupler body to increase the heat dissipation area is mainly used.

그러나, 상기 냉각 휜을 사용하는 종래의 냉각장치는 냉각액이 커플러 몸체의 내부에 고여 있는 상태이므로 냉각액의 순환이 이루어지지 않아서 냉각 효율이 만족스럽지 못한 문제점이 있다.However, the conventional cooling apparatus using the cooling fan has a problem that the cooling efficiency is not circulated because the cooling liquid is accumulated inside the coupler body, and thus the cooling efficiency is not satisfactory.

이에, 본 발명은 상기 문제점을 해결하기 위한 것으로, 냉각 효율을 향상시킨 신규한 구조의 냉각장치를 제공함을 목적으로 한다.Accordingly, an object of the present invention is to provide a cooling apparatus having a novel structure that improves the cooling efficiency.

도 1은 본 발명에 따른 냉각장치를 갖는 투사형 음극선관의 분해 사시도.1 is an exploded perspective view of a projection cathode ray tube having a cooling device according to the present invention.

도 2는 본 발명에 따른 냉각장치의 단면도.2 is a cross-sectional view of a cooling apparatus according to the present invention.

상기한 본 발명의 목적은,The object of the present invention described above,

투사형 음극선관의 전방에 조립되는 커플러 몸체와;A coupler body assembled at the front of the projection cathode ray tube;

상기 커플러 몸체를 둘러싸는 냉각액 순환 파이프와;A coolant circulation pipe surrounding the coupler body;

상기 커플러 몸체 내부와 냉각액 순환 파이프의 내부에 채워지는 냉각액;A coolant filled in the coupler body and in the coolant circulation pipe;

을 포함하며, 상기 투사형 음극선관의 형광막 스크린에서 발생하는 열을 냉각하는 투사형 음극선관의 냉각장치에 의해 달성된다.It comprises, and is achieved by the cooling device of the projection cathode ray tube for cooling the heat generated in the fluorescent film screen of the projection cathode ray tube.

이하, 첨부도면을 참조로 하여 본 발명의 바람직한 실시예를 상세히 설명하면 다음과 같다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 따른 냉각장치를 갖는 투사형 음극선관을 도시한 분해 사시도이고, 도 2는 본 발명에 따른 투사형 음극선관의 냉각장치를 도시한 단면도이다.1 is an exploded perspective view showing a projection cathode ray tube having a cooling device according to the present invention, Figure 2 is a cross-sectional view showing a cooling apparatus of a projection cathode ray tube according to the present invention.

투사형 음극선관(10)의 패널(11) 전방에는 미도시한 전자총에서 방출된 전자빔에 의해 발생하는 열을 냉각하기 위한 냉각장치(20)가 설치되고, 냉각장치(20)의 전방으로는 형광막 스크린(12)에 맺힌 상을 확대 투사시키는 렌즈계(30)가 구비된다.In front of the panel 11 of the projection type cathode ray tube 10, a cooling device 20 for cooling heat generated by an electron beam emitted from an electron gun not shown is provided, and a fluorescent film in front of the cooling device 20. The lens system 30 is provided to enlarge and project the image formed on the screen 12.

상기한 냉각장치의 구성을 도 2를 참조로 상세히 설명하면, 본 발명의 냉각장치는 투사형 음극선관(10)의 패널(11)면에 설치된 커플러 몸체(21)를 포함하는데, 이 몸체(21)는 홀더(13)에 의해 음극선관에 결합된다.Referring to the configuration of the cooling device in detail with reference to Figure 2, the cooling device of the present invention includes a coupler body 21 is installed on the panel 11 surface of the projection cathode ray tube 10, this body 21 Is coupled to the cathode ray tube by a holder 13.

이때, 상기 몸체(21)의 내부에는 형광막 스크린에서 발생하는 열을 냉각하기 위한 냉각액(22)이 채워지는바, 상기 냉각액(22)은 냉각액 주입구(23)를 통해 몸체(21) 내부 공간에 채워지며, 커플러 몸체(21)와 패널면(11) 사이에는 냉각액의누설을 방지하기 위한 밀봉재(24)가 삽입된다. 여기에서, 미설명 도면부호 25,26는 냉각액 주입구를 밀폐하는 캡 및 밀봉재를 각각 나타낸다.At this time, the inside of the body 21 is filled with a cooling liquid 22 for cooling the heat generated from the fluorescent film screen, the cooling liquid 22 through the cooling liquid inlet 23 to the interior space of the body 21 The sealing member 24 is inserted between the coupler body 21 and the panel surface 11 to prevent leakage of the cooling liquid. Here, reference numerals 25 and 26, which are not described, denote caps and sealants that seal the cooling liquid inlet, respectively.

그리고, 상기한 커플러 몸체(21)에는 냉각액 순환 파이프(27)가 1회 이상 몸체(21)를 둘러싸도록 설치되는데, 이때, 상기 냉각액 순환 파이프(27)는 몸체(21)의 내부 공간과 연통된다.In addition, the coupler body 21 is installed so that the coolant circulation pipe 27 surrounds the body 21 at least once, wherein the coolant circulation pipe 27 is in communication with the internal space of the body 21. .

따라서, 상기 냉각액 주입구(23)를 통해 주입된 냉각액(22)은 커플러 몸체(21)의 내부 공간과 냉각액 순환 파이프(27)의 내부 공간에 채워지게 되는데, 이때 상기 냉각액 순환 파이프(27) 내부의 냉각액과 커플러 몸체(21) 내부의 냉각액 사이에는 온도차가 발생하게 되며, 이로 인해 냉각액의 순환이 발생된다.Therefore, the coolant 22 injected through the coolant inlet 23 is filled in the inner space of the coupler body 21 and the inner space of the coolant circulation pipe 27, wherein the inside of the coolant circulation pipe 27 A temperature difference is generated between the coolant and the coolant inside the coupler body 21, which causes circulation of the coolant.

그리고, 상기 커플러 몸체(21)에는 돌출 결합부(28)가 제공되는데, 이 결합부(28)에는 여러개의 주름부(29')를 갖는 벨로우즈관(29)의 단부가 볼트형으로 결합된다. 이를 위해, 돌출 결합부(28)의 외면에는 수나사부가 제공되며, 벨로우즈관(29)의 단부 내면에는 암나사부가 제공된다.In addition, the coupler body 21 is provided with a projecting coupling portion 28, the end of the bellows pipe 29 having a plurality of corrugations 29 'is coupled to the coupling portion 28 in the form of bolts. To this end, male threads are provided on the outer surface of the protruding coupling portion 28 and female threads are provided on the inner surface of the end of the bellows pipe 29.

여기에서, 상기 벨로우즈관(29)은 냉각액(22)의 열적 변화로 인한 누설을 방지하고, 상온 및 고온시에 냉각액(22)의 내부에 기포가 발생되는 것을 방지하기 위한 것이다.Here, the bellows pipe 29 is to prevent leakage due to the thermal change of the cooling liquid 22, and to prevent the bubbles generated inside the cooling liquid 22 at room temperature and high temperature.

이러한 구성의 냉각장치에 의하면, 형광막 스크린(12)에서 발생된 열이 커플러 본체(21) 내부의 냉각액(22)과 열교환되면서 외부로 방출될 때, 커플러 본체(21) 내부의 냉각액은 음극선관의 패널(11) 전면에 직접 접촉하고 있으므로 상기 냉각액 순환 파이프(27) 내부의 냉각액보다 먼저 고온이 된다.According to the cooling device having such a configuration, when the heat generated from the fluorescent film screen 12 is discharged to the outside while being heat-exchanged with the cooling liquid 22 inside the coupler body 21, the cooling liquid inside the coupler body 21 is a cathode ray tube. Since it is in direct contact with the front surface of the panel 11, the temperature is higher than the coolant inside the coolant circulation pipe 27.

따라서, 상기 커플러 본체(21) 내부 및 냉각액 순환 파이프(27) 내부의 냉각액 사이에 온도차가 발생되고, 상기 온도차로 인해 냉각액이 순환하게 되므로, 냉각 효율이 향상된다.Therefore, a temperature difference is generated between the coupler main body 21 and the coolant inside the coolant circulation pipe 27, and the coolant circulates due to the temperature difference, thereby improving cooling efficiency.

또한, 벨로우즈관(29)에 여러개의 주름부(29')가 형성되어 있으므로 냉각액 누설 및 여압에 대한 대응이 보다 용이해지며, 벨로우즈관(29)의 장착 작업이 단순해지는 효과가 있다.In addition, since the bellows pipe 29 has a plurality of wrinkles (29 ') is formed, it is easier to cope with the leakage and cooling pressure of the coolant, there is an effect of simplifying the mounting work of the bellows pipe (29).

이상에서는 본 발명의 바람직한 실시예에 대하여 설명하였지만, 본 발명은 이에 한정되는 것이 아니고 특허청구범위와 발명의 상세한 설명 및 첨부한 도면의 범위 안에서 여러 가지로 변형하여 실시하는 것이 가능하고 이 또한 본 발명의 범위에 속하는 것은 당연하다.Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to the range of.

이상에서 살펴본 바와 같이 본 발명은 냉각액 순환 작용으로 인해 냉각 효율이 효과적으로 향상된다. 따라서, 투사 렌즈계의 수차 변화로 인해 컨버젼스 등의 특성이 저하되는 것을 방지함과 동시에 형광막의 휘도 열화를 저하시킬 수 있다.As described above, the present invention effectively improves the cooling efficiency due to the coolant circulation action. Therefore, it is possible to prevent the deterioration of characteristics such as convergence due to aberration change of the projection lens system and to reduce the deterioration of luminance of the fluorescent film.

또한, 벨로우즈관의 장착 작업이 단순하여 작업성을 향상시킬 수 있으며, 벨로우즈관에 구비된 주름부로 인해 냉각액 누설 및 여압에 대한 대응이 보다 용이한 등의 효과가 있다.In addition, the work of mounting the bellows pipe is simple, it is possible to improve the workability, and due to the pleats provided in the bellows pipe there is an effect that it is easier to respond to the coolant leakage and the pressurization pressure.

Claims (3)

투사형 음극선관의 전방에 조립되는 커플러 몸체와;A coupler body assembled at the front of the projection cathode ray tube; 상기 커플러 몸체를 둘러싸는 냉각액 순환 파이프와;A coolant circulation pipe surrounding the coupler body; 상기 커플러 몸체 내부와 냉각액 순환 파이프의 내부에 채워지는 냉각액;A coolant filled in the coupler body and in the coolant circulation pipe; 을 포함하며, 상기 투사형 음극선관의 형광막 스크린에서 발생하는 열을 냉각하는 투사형 음극선관의 냉각장치.And a cooling device for projecting cathode ray tubes for cooling heat generated from a fluorescent screen of the projection cathode ray tube. 제 1항에 있어서, 상기 냉각액 순환 파이프는 커플러 몸체의 내부와 연통되는 투사형 음극선관의 냉각장치.The apparatus of claim 1, wherein the coolant circulation pipe communicates with an interior of the coupler body. 제 1항 또는 제 2항에 있어서, 상기 커플러 몸체의 돌출 결합부에는 주름부를 갖는 벨로우즈관의 단부가 볼트 결합되는 투사형 음극선관의 냉각장치.The apparatus of claim 1 or 2, wherein an end portion of the bellows tube having a corrugation portion is bolted to the protruding coupling portion of the coupler body.
KR1020020019559A 2002-04-10 2002-04-10 Cooling system of projection cathode ray tube KR20030080769A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4529905A (en) * 1979-06-07 1985-07-16 Sony Corporation Cathode ray tube apparatus
JPS6124129A (en) * 1984-07-12 1986-02-01 Hitachi Ltd Liquid-cooled cathode-ray tube
KR860007699A (en) * 1985-03-20 1986-10-15 엔.브이.필립스 글로아이람펜파브리켄 Projection tv display tube
US4651047A (en) * 1984-06-01 1987-03-17 U.S. Philips Corporation Projection television display tube
JPH02119029A (en) * 1988-10-28 1990-05-07 Sony Corp Projection type cathode-ray tube
JPH10333245A (en) * 1997-05-29 1998-12-18 Matsushita Electric Ind Co Ltd Projection type picture receiver

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4529905A (en) * 1979-06-07 1985-07-16 Sony Corporation Cathode ray tube apparatus
US4651047A (en) * 1984-06-01 1987-03-17 U.S. Philips Corporation Projection television display tube
JPS6124129A (en) * 1984-07-12 1986-02-01 Hitachi Ltd Liquid-cooled cathode-ray tube
KR860007699A (en) * 1985-03-20 1986-10-15 엔.브이.필립스 글로아이람펜파브리켄 Projection tv display tube
JPH02119029A (en) * 1988-10-28 1990-05-07 Sony Corp Projection type cathode-ray tube
JPH10333245A (en) * 1997-05-29 1998-12-18 Matsushita Electric Ind Co Ltd Projection type picture receiver

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