GB1421865A - Cathode ray tube including a non-rotationally symmetrical electron-optical element - Google Patents

Cathode ray tube including a non-rotationally symmetrical electron-optical element

Info

Publication number
GB1421865A
GB1421865A GB1360473A GB1360473A GB1421865A GB 1421865 A GB1421865 A GB 1421865A GB 1360473 A GB1360473 A GB 1360473A GB 1360473 A GB1360473 A GB 1360473A GB 1421865 A GB1421865 A GB 1421865A
Authority
GB
United Kingdom
Prior art keywords
cathode
control grid
grid
aperture
lens
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
GB1360473A
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 GB1421865A publication Critical patent/GB1421865A/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
    • H01J29/48—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
    • 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
    • H01J29/566—Arrangements for controlling cross-section of ray or beam; Arrangements for correcting aberration of beam, e.g. due to lenses for correcting aberration

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)

Abstract

1421865 Cathode-ray tubes PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 21 March 1973 [24 March 1972] 13604/73 Heading H1D The electron gun of a cathode-ray display tube includes a cathode, control grid, acceleration anode, and a lens for focusing the beam, the control grid aperture being non-rotationally symmetrical, having major and minor axes of symmetry, and a smaller area than an ellipse having the same axial ratio and width, whereby to limit the effective emission area of the cathode to an oval portion and result in the production of an astigmatic beam, the lens being positioned to bring the beam to a focus with a predetermined axial ratio, As described, the apertures 11 and 14 in the control grid and the first anode 3, respectively, are orthogonally oriented diamond-lilo shapes, as shown, the control grid being disposed 125 microns from the surface of the dispenser cathode 1. The resulting beam is focused by the lens system 4,5,6, the diaphragm 18 with circular aperture 17 limiting the diameter of the beam and intercepting grid emission. Dimensions, spacings, and voltages for the various components are given. Reference is made to the alternative use of grid apertures in the form of two intersecting circular arcs, and to the use of the gun in an indexing type colour tube, in which the phosphor stripes are parallel to the major axis of the control grid aperture. The non-circular beam, by reducing the effect of space charge, permits reduced cathode loading.
GB1360473A 1972-03-24 1973-03-21 Cathode ray tube including a non-rotationally symmetrical electron-optical element Expired GB1421865A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7203931A NL7203931A (en) 1972-03-24 1972-03-24

Publications (1)

Publication Number Publication Date
GB1421865A true GB1421865A (en) 1976-01-21

Family

ID=19815685

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1360473A Expired GB1421865A (en) 1972-03-24 1973-03-21 Cathode ray tube including a non-rotationally symmetrical electron-optical element

Country Status (8)

Country Link
US (1) US3881136A (en)
JP (1) JPS4915359A (en)
CA (1) CA963069A (en)
DE (1) DE2311369A1 (en)
FR (1) FR2177860B3 (en)
GB (1) GB1421865A (en)
IT (1) IT980662B (en)
NL (1) NL7203931A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3018569A1 (en) * 1979-05-18 1980-11-27 Hitachi Ltd ELECTRODE OF A COLORED TUBE ELECTRONIC SPIN, AND METHOD FOR THE PRODUCTION THEREOF

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3980919A (en) * 1974-12-20 1976-09-14 Watkins-Johnson Company Rectangular beam laminar flow electron gun
JPS5413249A (en) * 1977-07-01 1979-01-31 Hitachi Ltd Cathode ray tube
JPS54133070A (en) * 1978-04-07 1979-10-16 Hitachi Ltd Constituent for electron gun
US4172309A (en) * 1978-07-21 1979-10-30 Zenith Radio Corporation Method of correcting deflection defocusing in self-converged color CRT display systems
EP0014922A1 (en) * 1979-02-22 1980-09-03 International Standard Electric Corporation Electron gun
JPS5973439A (en) * 1982-10-19 1984-04-25 Nippon Steel Corp Production of iron oxide from waste hydrochloric acid liquor for pickling
JPS6199249A (en) * 1984-10-18 1986-05-17 Matsushita Electronics Corp Picture tube apparatus
NL8600463A (en) * 1986-02-25 1987-09-16 Philips Nv CATHODE SPRAY TUBE WITH MEANS FOR VERTICAL STRETCH STRETCHING.
US4724359A (en) * 1986-10-17 1988-02-09 General Electric Company Laminar flow guns for light valves
US8008632B2 (en) * 2008-07-24 2011-08-30 Seagate Technology Llc Two-zone ion beam carbon deposition
CN102975519B (en) * 2012-02-21 2015-02-11 苑执中 Born pair diamond certificate manufacture method

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US3579010A (en) * 1968-10-31 1971-05-18 Philco Ford Corp Elongated aperture electron gun structure for flat cathode-ray tube

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3018569A1 (en) * 1979-05-18 1980-11-27 Hitachi Ltd ELECTRODE OF A COLORED TUBE ELECTRONIC SPIN, AND METHOD FOR THE PRODUCTION THEREOF

Also Published As

Publication number Publication date
JPS4915359A (en) 1974-02-09
US3881136A (en) 1975-04-29
CA963069A (en) 1975-02-18
NL7203931A (en) 1973-09-26
FR2177860A1 (en) 1973-11-09
FR2177860B3 (en) 1976-03-19
IT980662B (en) 1974-10-10
DE2311369A1 (en) 1973-10-04

Similar Documents

Publication Publication Date Title
SU495851A3 (en) TV receiver for color television
GB1522152A (en) Electron gun for cathode ray tubes
GB1379016A (en) Apparatus including a cathode-ray tube having an astigmatic electron gun
GB1536754A (en) Cathode-ray tube focussing
GB1421865A (en) Cathode ray tube including a non-rotationally symmetrical electron-optical element
GB1523305A (en) Athode ray tube electron gun
US3970890A (en) Plural beam cathode ray tube including an astigmatic electron lens and self-converging
US3895253A (en) Electron gun having extended field electrostatic focus lens
US3735190A (en) Color cathode ray tube
GB1231985A (en)
GB721571A (en) Cathode ray tube utilizing a plurality of electron beams
GB1281750A (en) Cathode ray tube
GB1226886A (en)
GB1494022A (en) Cathode-ray tube for displaying coloured pictures
GB1013989A (en) Cathode ray tube
GB1567807A (en) Cathode-ray tube
US3579010A (en) Elongated aperture electron gun structure for flat cathode-ray tube
US4584500A (en) Electron gun integral beam correctors in a color cathode ray tube
US3628077A (en) Electron gun having concave coined grid and annular rib
GB953881A (en) Low-power-deflection cathode ray tube
GB1308113A (en) Cathode-ray tube
US5434471A (en) Electron gun having focusing electrode and anode with a plurality of straight line segments
GB1353455A (en) Cathode-ray tube
US4399388A (en) Picture tube with an electron gun having non-circular aperture
US3610991A (en) Cathode-ray tube provided with at least one electron gun for producing a number of individually prefocused electron beams

Legal Events

Date Code Title Description
CSNS Application of which complete specification have been accepted and published, but patent is not sealed