KR0142700B1 - Projection-type cathode ray tube - Google Patents

Projection-type cathode ray tube

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Publication number
KR0142700B1
KR0142700B1 KR1019950008971A KR19950008971A KR0142700B1 KR 0142700 B1 KR0142700 B1 KR 0142700B1 KR 1019950008971 A KR1019950008971 A KR 1019950008971A KR 19950008971 A KR19950008971 A KR 19950008971A KR 0142700 B1 KR0142700 B1 KR 0142700B1
Authority
KR
South Korea
Prior art keywords
center
fluorescent film
ray tube
cathode ray
projection
Prior art date
Application number
KR1019950008971A
Other languages
Korean (ko)
Other versions
KR960039096A (en
Inventor
배효대
Original Assignee
구자홍
엘지전자주식회사
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Publication date
Application filed by 구자홍, 엘지전자주식회사 filed Critical 구자홍
Priority to KR1019950008971A priority Critical patent/KR0142700B1/en
Publication of KR960039096A publication Critical patent/KR960039096A/en
Application granted granted Critical
Publication of KR0142700B1 publication Critical patent/KR0142700B1/en

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Classifications

    • 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

Landscapes

  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Abstract

본 발명은 판넬의 내부면에 투사광의 발생 위치별로 곡률이 다른 복수개의 단이진 동심원 모양의 불연속면이 형성되므로써, 투사광의 집광에 의한 주변부의 휘도를 증대시킬 수 있고, 전자빔의 편향 중심에서 형광막까지의 도달거리가 센터부와 엣지부가 거의 동일하여 주변부 포커스 특성을 향상시킬 수 있으며, 주변부 포커스 특성을 향상시키기 위한 수단인 포커스 마그네트나 다이나믹 포커스 방식을 사용하지 않아도 되므로 인해 제품의 제작단가를 절감시킬 수 있는 것이다.According to the present invention, since a plurality of single-ended concentric circular discontinuous surfaces having different curvatures are formed on the inner surface of the panel, the luminance of the peripheral portion due to condensing of the projection light can be increased, and the deflection center of the electron beam can be increased from the fluorescent film. Since the reach of the center is almost the same as the center part and the edge part, it is possible to improve the peripheral focus characteristic, and it is possible to reduce the manufacturing cost of the product because it is not necessary to use the focus magnet or the dynamic focus method, which is a means for improving the peripheral focus characteristic. It is.

이를 위해, 본 발명은 판넬(1)에 전자빔의 편향 중심에서 형광막(2)까지의 도달거리가 형광막(2)의 센터와 엣지부분이 동일하도록 하기 위해 투사광의 발생 위치별로 곡률이 다른 복수개의 단이진 동심원 모양의 불연속면(3)이 형성된 투사형 음극선관이다.To this end, the present invention provides a plurality of different curvatures of the projection light to the panel 1 so that the distance from the deflection center of the electron beam to the fluorescent film 2 is the same as the center and the edge of the fluorescent film 2. Projection-type cathode ray tube formed of two end concentric discontinuous surfaces (3).

Description

투사형 음극선관Projection Cathode Ray Tube

제1도는 종래의 투사형 음극선관을 나타낸 종단면도1 is a longitudinal sectional view showing a conventional projection type cathode ray tube

제2도는 본 발명을 나타낸 종단면도Figure 2 is a longitudinal cross-sectional view showing the present invention

제3도는 본 발명의 판넬내부면을 나타낸 정면도3 is a front view showing the inner surface of the panel of the present invention

제4도는 (a) 및 (b) 본명에 따른 판넬의 다른 실시예를 나타낸 종단면도Figure 4 is a longitudinal cross-sectional view showing another embodiment of the panel according to (a) and (b) real name

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

1.1a:판넬 2:형광막1.1a: Panel 2: fluorescent film

3:불연속면 4:불연속렌즈3: discontinuous surface 4: discontinuous lens

본 발명은 투사형 음극선관에 관한 것으로서, 더욱 상세하게는 투사형 음극선관의 주변부 휘도 및 포커스 특성을 단순한 구조로서 향상시킬 수 있도록 한 것이다.The present invention relates to a projection type cathode ray tube, and more particularly, to improve the luminance and focus of the peripheral portion of the projection type cathode ray tube as a simple structure.

종래의 투사형 음극선관은 제1도에 나타낸 바와 같이, 판넬(1b)과 후방으로 넥크부(5)를 갖는 펀넬(6)이 일체화되어 구근형성(Bulb Form)을 이루고, 상기 넥크부(5)내에는 전자빔을 발생시킬 수 있도록 전자총(7)이 내장되며, 상기 펀넬(6)의 넥크부(5)외주면에는 전자총(7)에서 발생되어 방사되는 전자빔을 수평 및 수직방향으로 편향시켜 주도록 편향요크(8)가 설치되고, 상기 판넬(1b)의 내측면에는 전자빔이 부딪칠 때 화상이 맺혀지도록 형광막(2)이 도포되며, 상기 펀넬(6)의 내측면과 넥크부(5)의 내측면 상단에는 고압을 전자총(7)으로 인가시켜 주도록 흑연막(9)이 도포되고, 음극선관의 전방에는 스크린에 투사하여 화상을 확대시키는 제1,2,3렌즈 (10)(11)(12)로 된 광학렌즈부가 설치되어 구성된다.In the conventional projection type cathode ray tube, as shown in FIG. 1, the panel 1b and the funnel 6 having the neck portion 5 rearward are integrated to form a bulb form, and the neck portion 5 An electron gun 7 is embedded to generate an electron beam, and a deflection yoke is provided on the outer peripheral surface of the neck portion 5 of the funnel 6 to deflect the electron beam generated and emitted from the electron gun 7 in the horizontal and vertical directions. (8) is provided, and a fluorescent film (2) is applied to the inner surface of the panel (1b) so that an image is formed when an electron beam strikes, and the inner surface of the funnel (6) and the inside of the neck portion (5). The graphite film 9 is coated on the upper side of the side to apply a high pressure to the electron gun 7, and the first, second, and third lenses 10, 11 and 12 project the image on the screen in front of the cathode ray tube to enlarge the image. And an optical lens unit.

따라서, 투사형 음극선관의 전자총(7)으로부터 나온 전자빔이 판넬(1b)의 내부면에 도포된 형광막(2)을 여기시켜 얻어진 광을 음극선관 전방의 제1,2,3렌즈 (10)(11)(12)를 통해 스크린에 투사하여 화상을 확대시키는데, 투사형 음극선관은 직시형 음극선관에 비해 고광출력이 요구되므로 판넬(1b) 내부면의 형광막(2)을 350R의 곡률을 주어 렌즈역할을 하게 되므로써 주변부의 집광되는 광량을 증가시켜 주변 휘도를 향상시키게 된다.Therefore, the light obtained by exciting the fluorescent film 2 coated on the inner surface of the panel 1b by the electron beam emitted from the electron gun 7 of the projection cathode ray tube receives the first, second, and third lenses 10 ( 11) (12) to magnify the image by projecting on the screen. Since the projection type cathode ray tube requires higher light output than the direct type cathode ray tube, the fluorescent film 2 on the inner surface of the panel 1b is given a curvature of 350R. As a result, the amount of light collected at the periphery is increased to improve the ambient luminance.

그러나, 이와 같은 종래의 투사형 음극선관은 판넬(1b) 내부면의 형광막(2)이 350R의 곡률을 갖도록 하므로써 투사광의 집광에 의한 주변부 휘도는 향상시킬 수 있으나, 전자빔의 편상 중심에서 형광막(2)센터까지의 도달거리와 엣지(Edge)까지의 도달거리차가 심해 각종 수차에 의한 주변부 포커스 특성이 저하되고, 투사광의 발생위치별로 형광막(2)의 곡률이 고려되지 않아 균일한 휘도분포를 얻을 수 없으며, 주변부 포커스 특성을 향상시키기 위한 수단으로 포커스 마그네트나 다이나믹 포커스 방식을 채택하므로써 제작원가가 상승되고, 설치시의 어려움이 따르게 되는 등의 많은 문제점이 있었다.However, the conventional projection type cathode ray tube can improve the peripheral luminance due to the condensing of the projection light by allowing the fluorescent film 2 of the inner surface of the panel 1b to have a curvature of 350 R, but the fluorescent film ( 2) The difference between the distance to the center and the distance to the edge is so severe that the peripheral focus characteristic due to various aberrations is deteriorated, and the curvature of the fluorescent film 2 is not considered for each occurrence of the projection light so that uniform luminance distribution is achieved. There are many problems such as increase in manufacturing cost and difficulty in installation due to adopting a focus magnet or a dynamic focus method as a means for improving peripheral focus characteristics.

본 발명은 상기한 제반 문제점을 해결하기 위한 것으로서, 투사형 음극선관의 주변부 휘도 및 포커스 특성을 단순한 구조로서 향상시킬 수 있을 뿐만 아니라, 주변부 포커스 특성을 향상시키기 위한 포커스 마그네트나 다이나믹 포커스 방식을 사용하지 않아도 되므로 제작단가를 절감시킬 수 있는 투사형 음극선관을 제공하는데 그 목적이 있다.The present invention has been made to solve the above problems, and can not only improve the peripheral luminance and focus characteristics of the projection cathode ray tube as a simple structure, but also without using a focus magnet or dynamic focus method for improving the peripheral focus characteristics. Therefore, the purpose is to provide a projection type cathode ray tube that can reduce the manufacturing cost.

상기한 목적을 달성하기 위해 본 발명은 판넬에 전자빔의 편향중심에서 형광막까지의 도달거리가 형광막의 센터와 엣지부분이 동일하도록 하기 위해 투사광의 발생위치별로 곡률이 다른 복수개의 단이진 동심원 모양의 불연속면이 형성된 투사형 음극선관이다.In order to achieve the above object, the present invention provides a panel having a plurality of single-ended concentric circles having different curvatures at different locations of projection light so that the distance from the deflection center of the electron beam to the fluorescent film is equal to the center and the edge of the fluorescent film. Projection type cathode ray tube with discontinuous surface.

이하, 본 발명의 일실시예를 첨부도면 제2도 및 제3도를 참조하여 상세히 설명하면 다음과 같다.Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 2 and 3 of the accompanying drawings.

제2도는 본 발명을 나타낸 종단면도이고, 제3도는 본 발명의 판넬내부면을 나타낸 정면도로서, 투사형 음극선관의 판넬(1)내부면에 전자빔의 편향중심에서 형광막(2)까지의 도달거리가 형광막(2)센터와 엣지부분이 거의 동일하도록 하기 위해 투사광의 발생위치별로 곡률이 다른 복수개의 단이진 동심원 모양의 불연속면(3)이 형성되어 구성된다.FIG. 2 is a longitudinal sectional view showing the present invention, and FIG. 3 is a front view showing the inner surface of the panel of the present invention. The distance from the deflection center of the electron beam to the fluorescent film 2 on the inner surface of the panel 1 of the projection cathode ray tube is shown. In order to make the center of the fluorescent film 2 and the edge portion substantially the same, a plurality of single-ended concentric circular discontinuous surfaces 3 having different curvatures are formed for each occurrence position of the projection light.

이와 같이 구성된 본 발명은 제2도 및 제3도에 나타낸 바와 같이, 투사형 음극선관의 판넬(1)내부면에 투사광의 발생위치별로 곡률이 다른 복수개의 단이진 동심원 모양의 불연속면(3)이 형성되므로 상기 판넬(1)에 입사되는 전자빔의 형광막(2) 여기에 의해 발생하는 투사광을 적어도 투사형 음극선관의 중심축 방향과 평행하거나 중심축으로 향하도록 집광시켜 주므로써 음극선관에 주변부에서의 투사광의 손실을 방지할 수 있고, 주변부의 휘도를 향상시킬 수 있게 된다.In the present invention configured as described above, as shown in FIGS. 2 and 3, a plurality of short binary concentric discontinuous surfaces 3 having different curvatures are formed on the inner surface of the panel 1 of the projection type cathode ray tube according to the generation position of the projection light. Therefore, the projection light generated by excitation of the fluorescent film 2 of the electron beam incident on the panel 1 is focused at least in parallel with or directed toward the center axis of the projection type cathode ray tube. The loss of the projection light can be prevented, and the luminance of the peripheral portion can be improved.

또한, 전자빔의 편향중심에서 형광막(2)까지의 도달거리가 형광막(2) 센터와 엣지부분이 거의 동일하게 되므로 전자빔의 편향중심에서 형광막(2) 센터와 엣지부까지의 도달거리차가 심해서 형광막(2)의 센터를 중심으로 전자빔의 포커스를 맞출 경우 형광막(2)의 엣지부가 각종 수차에 의해 디포커싱되어 스폿(Spot)사이즈가 커지게 되는 것을 예방할 수 있게 된다.Also, since the distance from the deflection center of the electron beam to the fluorescent film 2 is almost the same as the center of the fluorescent film 2 and the edge portion, the difference in the distance from the deflection center of the electron beam to the center and the edge of the fluorescent film 2 is different. When the electron beam is focused around the center of the fluorescent film 2, the edge of the fluorescent film 2 is defocused by various aberrations, thereby preventing the spot size from increasing.

한편, 본 발명에 따른 판넬의 다른 실시예로서 제4도의 (a) 및 (b)에 나타낸 바와 같이, 평평한 판넬(1b)의 내부면 또는 외부면에 곡률이 다른 복수개의 단이진 동심원 모양의 불연속렌즈(4)를 부착시켜 사용하므로써 본 발명과 동일한 효과를 얻을 수 있게 된다.On the other hand, as shown in (a) and (b) of FIG. 4 as another embodiment of the panel according to the present invention, a plurality of single-binary concentric circular discontinuities having different curvatures on the inner or outer surface of the flat panel 1b. By attaching and using the lens 4, the same effects as in the present invention can be obtained.

이상에서와 같이, 본 발명은 판넬(1)의 내부면에 투사광의 발생위치별로 곡률이 다른 복수개의 단이진 동심원 모양의 불연속면(3)이 형성되므로써, 투사광의 집광에 의한 주변부의 휘도를 증대시킬 수 있고, 전자빔의 편향 중심에서 형광막(2)까지의 도달거리가 센터부와 엣지부가 거의 동일하여 주변부 포커스 특성을 향상시킬 수 있으며, 주변부 포커스 특성을 향상시키기 위한 수단인 포커스 마그네트나 다이나믹 포커스 방식을 사용하지 않아도 되므로 인해 제품의 제작단가를 절감시킬 수 있는 매우 유용한 발명이다.As described above, according to the present invention, a plurality of short-distance concentric circular discontinuous surfaces 3 having different curvatures are formed on the inner surface of the panel 1 so as to increase the luminance of the peripheral portion due to the condensing of the projection light. The distance from the deflection center of the electron beam to the fluorescent film 2 is almost the same as that of the center portion and the edge portion, so that the peripheral focus characteristic can be improved, and the focus magnet or dynamic focus method is a means for improving the peripheral focus characteristic. Since it is not necessary to use a very useful invention that can reduce the production cost of the product.

Claims (2)

판넬에 전자빔의 편향중심에서 형광막까지의 도달거리가 형광막의 센터와 엣지부분이 동일하도록 하기 위해 투사광의 발생위치별로 곡률이 다른 복수개의 단이진 동심원 모양의 불연속면이 형성된 것을 특징으로 하는 투사형 음극선관.Projection type cathode ray tube, characterized in that a plurality of single-ended concentric circular discontinuities with different curvatures are formed for each position of projection light so that the distance from the deflection center of the electron beam to the fluorescent film is equal to the center of the fluorescent film. . 제1항에 있어서, 상기 판넬의 내부면 또는 외부면에 곡률이 다른 복수개의 단이진 동심원 모양의 불연속렌즈가 부착된 투사형 음극선관.The projection cathode ray tube according to claim 1, wherein a plurality of staged concentric discontinuous lenses having different curvatures are attached to an inner surface or an outer surface of the panel.
KR1019950008971A 1995-04-17 1995-04-17 Projection-type cathode ray tube KR0142700B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950008971A KR0142700B1 (en) 1995-04-17 1995-04-17 Projection-type cathode ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950008971A KR0142700B1 (en) 1995-04-17 1995-04-17 Projection-type cathode ray tube

Publications (2)

Publication Number Publication Date
KR960039096A KR960039096A (en) 1996-11-21
KR0142700B1 true KR0142700B1 (en) 1998-07-15

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