WO1999028938A3 - Electron gun for a cathode ray tube - Google Patents

Electron gun for a cathode ray tube Download PDF

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Publication number
WO1999028938A3
WO1999028938A3 PCT/KR1998/000378 KR9800378W WO9928938A3 WO 1999028938 A3 WO1999028938 A3 WO 1999028938A3 KR 9800378 W KR9800378 W KR 9800378W WO 9928938 A3 WO9928938 A3 WO 9928938A3
Authority
WO
WIPO (PCT)
Prior art keywords
circular arc
vertical lines
electron gun
ray tube
cathode ray
Prior art date
Application number
PCT/KR1998/000378
Other languages
French (fr)
Other versions
WO1999028938A2 (en
Inventor
Joo Il Lee
Yu Sung Nam
Original Assignee
Orion Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Orion Electric Co Ltd filed Critical Orion Electric Co Ltd
Publication of WO1999028938A2 publication Critical patent/WO1999028938A2/en
Publication of WO1999028938A3 publication Critical patent/WO1999028938A3/en

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Classifications

    • 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
    • H01J29/488—Schematic arrangements of the electrodes for beam forming; Place and form of the elecrodes
    • 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
    • H01J2229/4844—Electron guns characterised by beam passing apertures or combinations

Abstract

An electron gun has a pluraltiy of grid electrodes for focusing electron beams radiated from cathodes, at least one of said grid electrodes having a cylindrical body containing a plate member. The plate member has a central electron-beam-passing-aperture and two side apertures. At least one of the two side apertures is contoured by a first circular arc and a second circular arc, two first vertical lines respectively extending outward from either ends of the first circular arc, two second vertical lines respectively extending outward from either ends of the second circular arc, and two connecting lines respectively connecting each of outer ends of the first vertical lines to each of outer ends of the second vertical lines. The electron gun improves the degree of freedom in controlling shapes of beam spots focused on a phosphor screen, thereby heightening the resolution of the cathode ray tube.
PCT/KR1998/000378 1997-11-29 1998-11-25 Electron gun for a cathode ray tube WO1999028938A2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR1997/64870 1997-11-29
KR19970064996 1997-11-29
KR1997/64996 1997-11-29
KR19970064870 1997-11-29

Publications (2)

Publication Number Publication Date
WO1999028938A2 WO1999028938A2 (en) 1999-06-10
WO1999028938A3 true WO1999028938A3 (en) 2000-06-29

Family

ID=26633216

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR1998/000378 WO1999028938A2 (en) 1997-11-29 1998-11-25 Electron gun for a cathode ray tube

Country Status (1)

Country Link
WO (1) WO1999028938A2 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4584500A (en) * 1983-07-29 1986-04-22 North American Philips Consumer Electronics Corp. Electron gun integral beam correctors in a color cathode ray tube
US4626738A (en) * 1983-08-05 1986-12-02 U.S. Philips Corporation Color display tube with electrostatic focusing lens
EP0283941A2 (en) * 1987-03-25 1988-09-28 Iwatsu Electric Co., Ltd. Cathode ray tube having an electron gun constructed for readay refocusing of the electron beam
EP0441486A2 (en) * 1990-02-08 1991-08-14 Hitachi, Ltd. Electron gun and cathode-ray tube
EP0469540A2 (en) * 1990-07-31 1992-02-05 Kabushiki Kaisha Toshiba Electron gun for cathode-ray tube
US5142189A (en) * 1989-11-08 1992-08-25 Matsushita Electronics Corporation In-line type electron gun for a color cathode ray tube
EP0624894A1 (en) * 1993-05-14 1994-11-17 Kabushiki Kaisha Toshiba Color cathode ray tube apparatus

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4584500A (en) * 1983-07-29 1986-04-22 North American Philips Consumer Electronics Corp. Electron gun integral beam correctors in a color cathode ray tube
US4626738A (en) * 1983-08-05 1986-12-02 U.S. Philips Corporation Color display tube with electrostatic focusing lens
EP0283941A2 (en) * 1987-03-25 1988-09-28 Iwatsu Electric Co., Ltd. Cathode ray tube having an electron gun constructed for readay refocusing of the electron beam
US5142189A (en) * 1989-11-08 1992-08-25 Matsushita Electronics Corporation In-line type electron gun for a color cathode ray tube
EP0441486A2 (en) * 1990-02-08 1991-08-14 Hitachi, Ltd. Electron gun and cathode-ray tube
EP0469540A2 (en) * 1990-07-31 1992-02-05 Kabushiki Kaisha Toshiba Electron gun for cathode-ray tube
EP0624894A1 (en) * 1993-05-14 1994-11-17 Kabushiki Kaisha Toshiba Color cathode ray tube apparatus

Also Published As

Publication number Publication date
WO1999028938A2 (en) 1999-06-10

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