GB1379016A - Apparatus including a cathode-ray tube having an astigmatic electron gun - Google Patents

Apparatus including a cathode-ray tube having an astigmatic electron gun

Info

Publication number
GB1379016A
GB1379016A GB2953373A GB2953373A GB1379016A GB 1379016 A GB1379016 A GB 1379016A GB 2953373 A GB2953373 A GB 2953373A GB 2953373 A GB2953373 A GB 2953373A GB 1379016 A GB1379016 A GB 1379016A
Authority
GB
United Kingdom
Prior art keywords
aperture
cathode
gun
elongate
anode
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB2953373A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries 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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1379016A publication Critical patent/GB1379016A/en
Expired legal-status Critical Current

Links

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
    • H01J29/56—Arrangements for controlling cross-section of ray or beam; Arrangements for correcting aberration of beam, e.g. due to lenses
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D217/00—Heterocyclic compounds containing isoquinoline or hydrogenated isoquinoline ring systems
    • C07D217/22—Heterocyclic compounds containing isoquinoline or hydrogenated isoquinoline ring systems with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to carbon atoms of the nitrogen-containing ring
    • C07D217/24—Oxygen atoms
    • 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

Abstract

1379016 Cathode-ray display tubes PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 21 Jun 1973 [24 June 1972] 29533/73 Heading H1D A C.R.T. includes an astigmatic gun with cathode 6, first grid 7, anode 8 and acceleration electrode 9, focusing lens and display screen, grid 7 having an elongate aperture (e.g. elliptic), anode 8 having an aperture that widens towards the target in planes parallel to a first plane containing the system axis and the length direction of the elongate aperture, the undeflected beam impinging on the screen as on elongate spot having its length directon parallel to the length of the elongate aperture and focused so that electrons travelling in the first plane are focused at a point spaced from and on the gun side of the target, while electrons travelling in a plane at right angles are focused at the screen surface, and wherein the tube and potentials are such that #5% of the beam current at the second grid is intercepted by it. Elliptic aperture 17 in anode 8 has a short axis at right angles to aperture 16 short axis and develops into rectangular aperture 18. Reduction of effective emissive area to reduce described defects is produced by reducing anode 8 aperture dimension on the cathode side in the length direction of aperture 16, and electrodes 7 to 8 distance. Spherical aberration in the longitudinal direction of the spot may also be reduced by the homogeneous field at the cathode proximity due to diaphragming. Fig. 1 (not shown) includes a single gun (3 gun shadow mask tubes may also be used), Al layer (14), layer (15) of u.v. emitting indexing strips, the screen being phosphor strips separated by black inactive strips. Beam and phosphor strip widths are equal, the spot being elongate parallel to the strips. Dimensions potentials and cross-over positions are given. Dynamic connection need not be applied for spot rotation. The above gun in a shadow mask tube may avoid moire patterns. Specification 1,352,217 is referred-to.
GB2953373A 1971-07-28 1973-06-21 Apparatus including a cathode-ray tube having an astigmatic electron gun Expired GB1379016A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US16693571A 1971-07-28 1971-07-28
NL7208728A NL7208728A (en) 1971-07-28 1972-06-24
US381074A US3919583A (en) 1971-07-28 1973-07-20 Electron gun with grid and anode having orthogonal elongated apertures

Publications (1)

Publication Number Publication Date
GB1379016A true GB1379016A (en) 1975-01-02

Family

ID=27351780

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2953373A Expired GB1379016A (en) 1971-07-28 1973-06-21 Apparatus including a cathode-ray tube having an astigmatic electron gun

Country Status (6)

Country Link
US (2) US3866081A (en)
CA (1) CA973921A (en)
DE (1) DE2328791A1 (en)
FR (1) FR2189864A1 (en)
GB (1) GB1379016A (en)
NL (1) NL7208728A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2544293A1 (en) * 1974-10-04 1976-04-08 Rca Corp ELECTRON BEAM SYSTEM

Families Citing this family (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3946266A (en) * 1973-06-11 1976-03-23 Sony Corporation Electrostatic and dynamic magnetic control of cathode ray for distortion compensation
NL7400887A (en) 1974-01-23 1975-07-25 Philips Nv CATHOD BEAM TUBE.
US4143293A (en) * 1975-01-24 1979-03-06 Matsushita Electronics Corporation In line electron guns for color tubes, each having a control grid with vertically elliptical aperture
JPS5351958A (en) * 1976-10-22 1978-05-11 Hitachi Ltd Electron gun
JPS5838679Y2 (en) * 1976-11-30 1983-09-01 ソニー株式会社 television receiver
JPS5413249A (en) * 1977-07-01 1979-01-31 Hitachi Ltd Cathode ray tube
NL178374C (en) * 1977-11-24 1986-03-03 Philips Nv ELECTRON RADIUS TUBE WITH NON-ROTATION SYMETRIC ELECTRON LENS BETWEEN FIRST AND SECOND GRID.
NL175002C (en) * 1977-11-24 1984-09-03 Philips Nv CATHODE JET TUBE WITH AT LEAST AN ELECTRON GUN.
JPS5490963A (en) * 1977-12-28 1979-07-19 Toshiba Corp Index color receiving tube
JPS54133070A (en) * 1978-04-07 1979-10-16 Hitachi Ltd Constituent for electron gun
US4318027A (en) * 1978-04-12 1982-03-02 Rca Corporation High potential, low magnification electron gun
US4234814A (en) * 1978-09-25 1980-11-18 Rca Corporation Electron gun with astigmatic flare-reducing beam forming region
JPS55154044A (en) * 1979-05-18 1980-12-01 Hitachi Ltd Electrode structure of electron gun and its manufacture
US4251747A (en) * 1979-11-15 1981-02-17 Gte Products Corporation One piece astigmatic grid for color picture tube electron gun
US4318026A (en) * 1980-04-30 1982-03-02 Rca Corporation Method of making a grid for a cathode-ray tube electron gun
US4319163A (en) * 1980-06-30 1982-03-09 Rca Corporation Electron gun with deflection-synchronized astigmatic screen grid means
US4628224A (en) * 1980-08-04 1986-12-09 North American Philips Consumer Electronics Corp. Beam shaping CRT electrode
US4399388A (en) * 1980-10-16 1983-08-16 Tokyo Shibaura Denki Kabushiki Kaisha Picture tube with an electron gun having non-circular aperture
NL8102526A (en) * 1981-05-22 1982-12-16 Philips Nv COLOR IMAGE TUBE.
US4514659A (en) * 1982-03-04 1985-04-30 Rca Corporation Inline electron gun for high resolution color display tube
US4496877A (en) * 1982-04-06 1985-01-29 Zenith Electronics Corporation Unipotential electron gun for short cathode ray tubes
JPS598246A (en) * 1982-07-05 1984-01-17 Toshiba Corp Electron gun
US4558253A (en) * 1983-04-18 1985-12-10 Rca Corporation Color picture tube having an inline electron gun with asymmetric focusing lens
US4520292A (en) * 1983-05-06 1985-05-28 Rca Corporation Cathode-ray tube having an asymmetric slot formed in a screen grid electrode of an inline electron gun
NL8301601A (en) * 1983-05-06 1984-12-03 Philips Nv CATHED BEAM TUBE.
US4899091A (en) * 1984-05-29 1990-02-06 Tektronix, Inc. Cathode-ray-tube astigmatism correction apparatus
US4608515A (en) * 1985-04-30 1986-08-26 Rca Corporation Cathode-ray tube having a screen grid with asymmetric beam focusing means and refraction lens means formed therein
NL8600463A (en) * 1986-02-25 1987-09-16 Philips Nv CATHODE SPRAY TUBE WITH MEANS FOR VERTICAL STRETCH STRETCHING.
US4764704A (en) * 1987-01-14 1988-08-16 Rca Licensing Corporation Color cathode-ray tube having a three-lens electron gun
FR2705164B1 (en) * 1993-05-10 1995-07-13 Thomson Tubes & Displays Color image tube with electron guns in line with astigmatic lenses.
US6031326A (en) * 1997-04-01 2000-02-29 Hitachi, Ltd. Electron gun with electrode supports
US6369512B1 (en) 1998-10-05 2002-04-09 Sarnoff Corporation Dual beam projection tube and electron lens therefor
DE29823118U1 (en) * 1998-12-28 1999-02-25 Siemens Ag Tube neck for a cathode ray tube
US6646669B2 (en) * 2000-12-14 2003-11-11 Creo Inc. Multimode multi-track optical recording system
JP2004516608A (en) * 2000-12-14 2004-06-03 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Single beam tracking type cathode ray tube
US11125409B2 (en) 2019-12-16 2021-09-21 Valeo North America, Inc. Image tilt correction system of automotive beam pattern

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2103645A (en) * 1932-12-20 1937-12-28 Schlesinger Kurt Braun tube
GB501058A (en) * 1937-08-21 1939-02-21 Cabot Seaton Bull Improvements in or relating to cathode ray tubes
US2840754A (en) * 1954-09-01 1958-06-24 Rca Corp Electron beam tube
NL219031A (en) * 1956-09-07
NL6717635A (en) * 1967-12-22 1969-06-24

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2544293A1 (en) * 1974-10-04 1976-04-08 Rca Corp ELECTRON BEAM SYSTEM

Also Published As

Publication number Publication date
US3919583A (en) 1975-11-11
US3866081A (en) 1975-02-11
NL7208728A (en) 1973-12-28
CA973921A (en) 1975-09-02
USB381074I5 (en) 1975-01-28
FR2189864A1 (en) 1974-01-25
DE2328791A1 (en) 1974-01-17

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees