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GB1055729A - Cathode ray tubes - Google Patents

Cathode ray tubes

Info

Publication number
GB1055729A
GB1055729A GB21987/64A GB2198764A GB1055729A GB 1055729 A GB1055729 A GB 1055729A GB 21987/64 A GB21987/64 A GB 21987/64A GB 2198764 A GB2198764 A GB 2198764A GB 1055729 A GB1055729 A GB 1055729A
Authority
GB
United Kingdom
Prior art keywords
grid
aperture
cathode
diameter
end wall
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
GB21987/64A
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.)
GTE Sylvania Inc
Original Assignee
Sylvania Electric Products Inc
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 Sylvania Electric Products Inc filed Critical Sylvania Electric Products Inc
Publication of GB1055729A publication Critical patent/GB1055729A/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
    • H01J29/52—Arrangements for controlling intensity of ray or beam, e.g. for modulation

Landscapes

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

Abstract

1,055,729. Cathode-ray tubes. SYLVANIA ELECTRIC PRODUCTS Inc. May 27, 1964 [June 4, 1963], No. 21987/64. Heading H1D. An electron gun comprises a cathode 23, Fig. 2, and first and second cup-shaped grids 31, 33 having aligned apertures, the second grid aperture having, at its end nearest the cathode, a diameter Ad2, which is at least equal to the diameter Ad1 of the first grid aperture, and which is not greater than the diameter Ad2<SP>1</SP> of the far end of the second grid aperture. The effective thickness Et2 of the second grid aperture is greater than one half of Ad2, while the effective thickness Et1 of the first grid aperture is less than one fifth of Ad1. As shown, the second grid aperture is formed by separate, different-sized apertures in space sections of a double grid end wall 55, 57. Alternatively, the apertured portions of double end wall 55, 57 may be in contact, or the second grid may comprise a single end wall formed with a frusto-conical aperture, Figs. 4-8 (not shown). The electron gun may be used in a cathodedriven, display tube, and achieves high transconductance, the second grid providing effective shielding of the first grid-cathode region.
GB21987/64A 1963-06-04 1964-05-27 Cathode ray tubes Expired GB1055729A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US285384A US3295001A (en) 1963-06-04 1963-06-04 Cathode ray tube gun having a second grid with an effective thickness

Publications (1)

Publication Number Publication Date
GB1055729A true GB1055729A (en) 1967-01-18

Family

ID=23094004

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21987/64A Expired GB1055729A (en) 1963-06-04 1964-05-27 Cathode ray tubes

Country Status (2)

Country Link
US (1) US3295001A (en)
GB (1) GB1055729A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2205162A1 (en) * 1971-02-05 1972-08-10 Hitachi Ltd Electron gun

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3461342A (en) * 1968-06-14 1969-08-12 Philco Ford Corp Color crt assembly
FR2201536B1 (en) * 1972-09-26 1976-08-13 Thomson Csf
US3894261A (en) * 1973-07-09 1975-07-08 Hughes Aircraft Co No-crossover electron gun
US4044282A (en) * 1974-10-17 1977-08-23 Balandin Genrikh D Cathode-ray tube with variable energy of beam electrons
US4142133A (en) * 1976-10-20 1979-02-27 Balandin Genrikh D Cathode-ray tube with variable energy of beam electrons
AU4515779A (en) * 1978-04-12 1979-10-18 Rca Corp. 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
NL7904114A (en) * 1979-05-25 1980-11-27 Philips Nv COLOR IMAGE TUBE.
US4319160A (en) * 1979-11-15 1982-03-09 North American Philips Consumer Electronics Corp. One piece astigmatic grid for color picture tube electron gun and method of making same
US4318026A (en) * 1980-04-30 1982-03-02 Rca Corporation Method of making a grid for a cathode-ray tube electron gun
NL8301601A (en) * 1983-05-06 1984-12-03 Philips Nv CATHED BEAM TUBE.
DE3718838A1 (en) * 1987-06-05 1988-12-15 Standard Elektrik Lorenz Ag ELECTRIC HEATER GENERATOR SYSTEM
DE69506080T2 (en) 1994-08-25 1999-06-10 Koninklijke Philips Electronics N.V., Eindhoven IMAGE DISPLAY DEVICE WITH ELECTRONIC CANNON, AND ELECTRONIC CANNON FOR USE IN SUCH A DEVICE
US7579605B2 (en) * 2006-09-29 2009-08-25 Varian Semiconductor Equipment Associates, Inc. Multi-purpose electrostatic lens for an ion implanter system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB606147A (en) * 1945-11-28 1948-08-06 Gerhard Liebmann Improvements in or relating to electron discharge tubes
DE1005200B (en) * 1953-03-09 1957-03-28 Loewe Opta Ag Electrode pre-system for electron beam tubes, especially television picture tubes
US2927236A (en) * 1955-10-21 1960-03-01 Scient Lab Developments Inc Television picture tube
US3008064A (en) * 1957-10-28 1961-11-07 Rauland Corp Cathode-ray tube
US2971108A (en) * 1958-09-26 1961-02-07 Sylvania Electric Prod Electron discharge device
BE630810A (en) * 1962-04-13

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2205162A1 (en) * 1971-02-05 1972-08-10 Hitachi Ltd Electron gun

Also Published As

Publication number Publication date
US3295001A (en) 1966-12-27

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