KR880002989Y1 - A electron gun for a c.r.t - Google Patents

A electron gun for a c.r.t Download PDF

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Publication number
KR880002989Y1
KR880002989Y1 KR2019850010431U KR850010431U KR880002989Y1 KR 880002989 Y1 KR880002989 Y1 KR 880002989Y1 KR 2019850010431 U KR2019850010431 U KR 2019850010431U KR 850010431 U KR850010431 U KR 850010431U KR 880002989 Y1 KR880002989 Y1 KR 880002989Y1
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KR
South Korea
Prior art keywords
cathode
heater
electron gun
sleeve
initial
Prior art date
Application number
KR2019850010431U
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Korean (ko)
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KR870004388U (en
Inventor
이경상
Original Assignee
주식회사 금성사
허신구
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Priority to KR2019850010431U priority Critical patent/KR880002989Y1/en
Publication of KR870004388U publication Critical patent/KR870004388U/en
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Publication of KR880002989Y1 publication Critical patent/KR880002989Y1/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
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/48—Electron guns
    • H01J29/485—Construction of the gun or of parts thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/48—Electron guns
    • H01J2229/4824—Constructional arrangements of electrodes
    • H01J2229/4831—Electrode supports

Abstract

내용 없음.No content.

Description

음극선관용 전자총의 캐소드 구조체Cathode structure of electron gun for cathode ray tube

제 1 도는 일반적인 전자총의 개략 단면도.1 is a schematic cross-sectional view of a common gun.

제 2 도는 종래의 캐소드 구조체를 보인 단면도.2 is a cross-sectional view showing a conventional cathode structure.

제 3 도는 본 고안의 캐소드 구조체를 보인 단면도.3 is a cross-sectional view showing a cathode structure of the present invention.

제 4 도는 종래의 캐소드 구조체와 본 고안 캐소드. 구조체의 캐소드 전류의 변화를 보인 그래프.4 is a conventional cathode structure and the present invention cathode. A graph showing the change in the cathode current of a structure.

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

1 : 히이터 7 : 캐소드 슬리이브1: Heater 7: cathode sleeve

9 : 호울더 10 : 비이드 유리9: holder 10: bead glass

11 : 지지대 A : 초기열 발생부11: support A: initial heat generating unit

B' : 접속부B ': Connection

본 고안은 음극선관 내의 후방에 설치되어 전자 빔을 발사하는 음극선관용 전자총에 있어서, 히이터에서 발생되는 열에 의해 가열되어 열전자를 방출하는 캐소드가 가열 초기 시간에 상부로 팽창되지 않게 하여 초기 캐소드 전류가 과도하게 흐르지 않게 한 음극선관용 전자총의 캐소드 구조체에 관한 것이다.The present invention is a cathode ray tube electron gun installed behind the cathode ray tube to emit an electron beam, the cathode which is heated by the heat generated from the heater to emit hot electrons does not expand to the upper portion at the initial heating time, so that the initial cathode current is excessive It relates to a cathode structure of the electron gun for cathode ray tubes that do not flow smoothly.

일반적으로 음극선관용 전자총은 제1도에 도시한 바와 같이 히이터(1)의 가열에 따라 열전자를 방출하는 캐소드(2)와, 그 방출된 열전자를 제어하는 제1그리드(3) 및 가속하는 제2그리드(4), 접속하는 제3 및 제4그리드(5)(6)등으로 구성되어 있다.In general, an electron gun for a cathode ray tube, as shown in FIG. 1, has a cathode 2 emitting hot electrons as the heater 1 is heated, a first grid 3 controlling the emitted hot electrons, and an accelerating second. It consists of the grid 4, the 3rd and 4th grids 5, 6, etc. which are connected.

이와 같은 전자총에 있어서, 종래에는 캐소드(2)를 제2도에 도시한 바와 같이 내측에 히이터(1)가 끼워지는 캐소드 슬리이브(7)의 상부에 캡(8)을 씌우고, 그 캐소드 슬리이브(7)의 하부에는 호울더(9)를 고정시킨후 그 호울더(9)를 비이드 유리(10)에 설치된 지지대(11)에 설치하여 고정하였다.In such an electron gun, the cap 8 is conventionally covered with the cap 8 on top of the cathode sleeve 7 in which the heater 1 is fitted inside the cathode 2 as shown in FIG. The holder 9 was fixed to the lower part of (7), and the holder 9 was fixed to the support 11 provided in the bead glass 10.

이와 같이 구성된 종래의 캐소드 구조체는 히이터(1)에 전원이 인가되면 초기 시간에 히이터(1)의 하부의 초기열 발생부(A)에서 먼저 열이 발생하여 점차 상부로 올라가게 되고, 그 발생된 열은 복사 및 전도 등으로 캐소드 슬리이브(7)에 흡수되어 열전자가 방출되면서 제1-제4그리드(3-6)의 작용에 의해 캐소드 전류가 흐르게 되는데, 여기서 캐소드 슬리이브(7)와 호울더(9)의 접속부(B)가 히이터(1)의 초기열 발생부(A)의 하부에 위치하고 있으므로 히이터(1)에 전원이 인가된 초기 시간에 캐소드 슬리이브(7)가 갑자기 상부로 팽창하면서 제1그리드(3)와 캡(8)간의 간격이 매우 가까워지게 되고, 이에따라 제4도에 실선(가)로 도시한 바와 같이 캐소드 전류의 과도 현상이 나타나게 되므로 캐소드(2)에 과부하가 인가되어 그 사용 수명을 단출시킴은 물론 화면의 밝기(brightness)가 변화되는 결함이 있었다.In the conventional cathode structure configured as described above, when power is applied to the heater 1, heat is first generated in the initial heat generating portion A of the lower part of the heater 1 at an initial time, and gradually rises upward. The heat is absorbed by the cathode sleeve 7 by radiation and conduction, and the hot electrons are released, so that the cathode current flows by the action of the first-fourth grid 3-6, where the cathode sleeve 7 Since the connection portion B of the ulder 9 is located below the initial heat generating portion A of the heater 1, the cathode sleeve 7 suddenly expands upward at an initial time when the power is applied to the heater 1. While the gap between the first grid 3 and the cap 8 is very close to each other, a transient phenomenon of the cathode current appears as shown by the solid line in FIG. 4, so that an overload is applied to the cathode 2 Shorten its useful life and, of course, There were flaws in groups (brightness) change.

본 고안은 이와 같은 종래의 결함을 감안하여, 히이터에 전원이 인가된 초기시간에 캐소드 슬리이브가 상부로 팽창되지 않게 안출한 것으로, 이를 첨부된 도면에 의하여 상세히 설명하면 다음과 같다.The present invention in view of the conventional defects, such that the cathode sleeve does not expand to the upper portion at the initial time when the power is applied to the heater, which will be described in detail by the accompanying drawings as follows.

제3도에 도시한 바와같이 내측에 히이터(1)가 끼워지는 캐소드(7)의 상부에 캡(8)을 씌운 후 호울더(9) 및 지지대(11)로 비이드 유리(10)에 고정시킨 캐소드 구조체에 있어서, 상기 캐소드 슬리이브(7)와 호울더(9)의 접속부(B')가 히이터(1)의 초기 열 발생부(A)보다 상부에 위치되게 구성한 것이다.As shown in FIG. 3, the cap 8 is placed on the upper portion of the cathode 7 into which the heater 1 is fitted, and then fixed to the bead glass 10 with the holder 9 and the support 11. In the cathode structure, the connection portion B 'of the cathode sleeve 7 and the holder 9 is configured to be positioned above the initial heat generating portion A of the heater 1.

이와 같이 구성된 본 고안은 히이터(1)에 전원이 인가된 초기 시간에 초기 열 발생부(A)에서 열이 발생하여 캐소드 슬리이브(7)가 그 열을 흡수하면, 종래와 마찬가지로 캐소드 슬리이브(7)가 갑자기 팽창하게 되나, 이때 캐소드 슬리이브(7)의 팽창이 접속부(B')의 하부로 작용하고, 상부로는 팽창하지 않게 되어 캡(8)과 제1그리드(3)간의 간격이 일정하게 유지되므로 제4도에 실선(나)로 도시한 바와같이 초기 캐소드 전류의 과도현상이 매우 적어지게 되어 화면의 밝기가 일정하게 되고, 캐소드(2)에 과부하가 인가되지 않아 사용 수명이 연장되는 효과가 있게된다.According to the present invention configured as described above, when the heat is generated in the initial heat generating unit A at the initial time when the power is applied to the heater 1 and the cathode sleeve 7 absorbs the heat, the cathode sleeve ( 7) suddenly expands, but at this time, the expansion of the cathode sleeve 7 acts as a lower portion of the connection portion B 'and does not expand upwardly, so that the gap between the cap 8 and the first grid 3 is increased. As it is kept constant, the transient phenomenon of the initial cathode current becomes very small as shown by the solid line (b) in FIG. 4, the brightness of the screen is constant, and the overload is not applied to the cathode 2, thereby extending the service life. Become effective.

Claims (1)

내측에 히이터(1)가 끼워지는 캐소드 슬리이브(7)를 호울더(9) 및 지지대(11)로 비이드 유리(10)에 고정시킨 캐소드 구조체에 있어서, 상기 캐소드 슬리이브(7)와 호울더(9)의 접속부(B')가 히이터(1)의 초기 열 발생부(A)보다 상부에 위치되게 구성함을 특징으로 하는 음극선관용 전자총의 캐소드 구조체.In the cathode structure in which the cathode sleeve 7 into which the heater 1 is fitted is fixed to the bead glass 10 by the holder 9 and the support 11, the cathode sleeve 7 and the arc A cathode structure of a cathode ray tube electron gun, characterized in that the connecting portion (B ') of the ulder (9) is positioned above the initial heat generating portion (A) of the heater (1).
KR2019850010431U 1985-08-14 1985-08-14 A electron gun for a c.r.t KR880002989Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019850010431U KR880002989Y1 (en) 1985-08-14 1985-08-14 A electron gun for a c.r.t

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019850010431U KR880002989Y1 (en) 1985-08-14 1985-08-14 A electron gun for a c.r.t

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KR870004388U KR870004388U (en) 1987-07-31
KR880002989Y1 true KR880002989Y1 (en) 1988-08-23

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