EP0014922A1 - Canon à électrons - Google Patents

Canon à électrons Download PDF

Info

Publication number
EP0014922A1
EP0014922A1 EP80100657A EP80100657A EP0014922A1 EP 0014922 A1 EP0014922 A1 EP 0014922A1 EP 80100657 A EP80100657 A EP 80100657A EP 80100657 A EP80100657 A EP 80100657A EP 0014922 A1 EP0014922 A1 EP 0014922A1
Authority
EP
European Patent Office
Prior art keywords
electron beam
auxiliary electrode
electron
electrode
deflection
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.)
Withdrawn
Application number
EP80100657A
Other languages
German (de)
English (en)
Inventor
Wolfram Andre
Hans Müller
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of EP0014922A1 publication Critical patent/EP0014922A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • 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

Definitions

  • the invention relates to an electron beam generation system for an in-line color picture tube, in which an inhomogeneous electromagnetic deflection field is used to achieve extensive self-convergence of the electron beams.
  • Self-converging deflection systems of in-line color picture tubes have the property of a very strongly inhomogeneous horizontal deflection field. This leads to the fact that the electron beam, which is circular in the center of the image, is elliptically pulled apart in the horizontal direction on the left and right edge of the image.
  • a further improvement in the image quality can, however, be achieved if the electron beams are generated in dependence on the horizontal beam deflection in such a way that the deformation of the electron beam is compensated for by the inhomogeneity of the horizontal deflection field, so that a circular electron beam is obtained practically over the entire screen.
  • the object of the invention is to provide an electron beam generation system which enables controllable astigmatic electron beam shaping without requiring additional electrodes located in the region of the main electron lens.
  • a further auxiliary electrode which is not rotationally symmetrical with respect to the beam axis, is arranged in the electron beam generating system between the Wehnelt electrode and the electrodes of the main lens, to which an auxiliary voltage dependent on the beam deflection is supplied.
  • An advantageous embodiment of the invention provides for the beam-influencing parts of the auxiliary electrode to be formed symmetrically to the vertical and horizontal axes of the system.
  • the auxiliary electrode is particularly simple in design if it is essentially formed by a disk arranged perpendicular to the beam axis, which has a rectangular opening around the beam axis and whose longer side of the opening is formed parallel to the horizontal system axis.
  • a particularly advantageous attachment of the auxiliary electrode is obtained if it is attached to another electrode of the electron gun by means of an insulating part.
  • auxiliary electrode 4 shows a highly schematized typical electron beam generating system with an auxiliary electrode 4 according to the invention. The following are further shown: the cathode 1, the Wehnelt electrode 2, the screen grid 3 and the focusing electrode 5, which together with the anode 6 form the main lens. In their parts that are essential for the mode of operation, all of the electrodes, with the exception of the auxiliary electrode 4, are constructed to be rotationally symmetrical.
  • the auxiliary electrode 4, which is arranged between the screen grid 3 and the focusing electrode 5, consists of a disc perpendicular to the beam axis, which, as can be seen in FIG. 2, has a rectangular opening 4a in the center in the region of the electron beam, which is symmetrical to the horizontal and vertical system direction is executed.
  • auxiliary electrode 4 long sides of the rectangular opening of the auxiliary electrode 4 can have an effect on the electron beam, since only they are sufficiently close to it.
  • auxiliary electrode 4 there are numerous design options, such as making the opening 4a elliptical, or extending the long sides of the rectangle of the opening in such a way that the auxiliary electrode only consists of two circular sections.
  • FIG. 3 shows how the auxiliary electrode 4 is spaced from the screen grid 3 by insulating material 7.
  • FIG. 3 shows how the auxiliary electrode 4 is spaced from the screen grid 3 by insulating material 7.
  • another of the many design options is mentioned, which consists in producing the auxiliary electrode 4 by vapor deposition on the insulator 7.
  • Electrode arrangements are not suitable for fulfilling the object according to the invention which, in addition to the non-rotationally symmetrical component, have a significant rotationally symmetrical effect on the electron beam in their beam influencing.
  • an additional undesired rotationally symmetrical defocusing of the electron beam would also occur if a beam deflection-dependent potential was applied.

Landscapes

  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
EP80100657A 1979-02-22 1980-02-08 Canon à électrons Withdrawn EP0014922A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2906851 1979-02-22
DE2906851 1979-02-22

Publications (1)

Publication Number Publication Date
EP0014922A1 true EP0014922A1 (fr) 1980-09-03

Family

ID=6063605

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80100657A Withdrawn EP0014922A1 (fr) 1979-02-22 1980-02-08 Canon à électrons

Country Status (1)

Country Link
EP (1) EP0014922A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2530379A1 (fr) * 1982-07-16 1984-01-20 Videocolor Systeme de canons a electrons pour un tube cathodique de television
GB2164490A (en) * 1981-07-10 1986-03-19 Rca Corp An electron gun assembly for colour CRT

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT147069B (de) * 1933-06-10 1936-09-25 Loewe Opta Gmbh Braunsche Röhre.
GB454258A (en) * 1935-03-27 1936-09-28 Marconi Wireless Telegraph Co Improvements in or relating to electron gun structures suitable for use in cathode ray tubes, cathode ray beam amplifier valves and like electron discharge devices
CH242029A (de) * 1934-06-27 1946-04-15 Fides Gmbh Elektronenoptisches System für Elektronenstrahlröhren, insbesondere für Oszillographen- und Fernsehröhren.
DE1162957B (de) * 1956-09-07 1964-02-13 Western Electric Co Elektronenlinsensystem zur Korrektur der Strahlenbuendelung in einer Kathodenstrahlroehre
DE1953411A1 (de) * 1968-11-09 1970-06-11 Philips Nv Vorrichtung mit einer Kathodenstrahlroehre und Kathodenstrahlroehre zur Anwendung in einer solchen Vorrichtung
DE2311369A1 (de) * 1972-03-24 1973-10-04 Philips Nv Elektronenstrahlroehre mit einem nichtrotationssymmetrischen element
DE2602521A1 (de) * 1975-01-24 1976-07-29 Matsushita Electronics Corp Bildroehrenanordnung fuer farbfernsehen
DE2114310B2 (de) * 1970-04-11 1977-11-17 N.V. Philips" Gloeilampenfabrieken, Eindhoven (Niederlande) Kathodenstrahl-bildroehre

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT147069B (de) * 1933-06-10 1936-09-25 Loewe Opta Gmbh Braunsche Röhre.
CH242029A (de) * 1934-06-27 1946-04-15 Fides Gmbh Elektronenoptisches System für Elektronenstrahlröhren, insbesondere für Oszillographen- und Fernsehröhren.
GB454258A (en) * 1935-03-27 1936-09-28 Marconi Wireless Telegraph Co Improvements in or relating to electron gun structures suitable for use in cathode ray tubes, cathode ray beam amplifier valves and like electron discharge devices
DE1162957B (de) * 1956-09-07 1964-02-13 Western Electric Co Elektronenlinsensystem zur Korrektur der Strahlenbuendelung in einer Kathodenstrahlroehre
DE1953411A1 (de) * 1968-11-09 1970-06-11 Philips Nv Vorrichtung mit einer Kathodenstrahlroehre und Kathodenstrahlroehre zur Anwendung in einer solchen Vorrichtung
DE2114310B2 (de) * 1970-04-11 1977-11-17 N.V. Philips" Gloeilampenfabrieken, Eindhoven (Niederlande) Kathodenstrahl-bildroehre
DE2311369A1 (de) * 1972-03-24 1973-10-04 Philips Nv Elektronenstrahlroehre mit einem nichtrotationssymmetrischen element
DE2602521A1 (de) * 1975-01-24 1976-07-29 Matsushita Electronics Corp Bildroehrenanordnung fuer farbfernsehen

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2164490A (en) * 1981-07-10 1986-03-19 Rca Corp An electron gun assembly for colour CRT
DE3249810C2 (fr) * 1981-07-10 1990-02-15 Rca Licensing Corp., Princeton, N.J., Us
FR2530379A1 (fr) * 1982-07-16 1984-01-20 Videocolor Systeme de canons a electrons pour un tube cathodique de television

Similar Documents

Publication Publication Date Title
DE2608463C3 (de) Inline-Farbbildröhre
DE3614700C2 (fr)
DE2223369C3 (de) In-Line-Kathodenstrahlröhre
DE69017350T2 (de) Farbbildkathodenstrahlröhre.
DE3839389C2 (fr)
DE3246458C2 (fr)
DE3888748T2 (de) Struktur einer Elektronenkanone für Farbbildröhrengerät.
DE68928732T2 (de) Elektronenkanonenvorrichtung für Kathodenstrahlröhre
DE68927720T2 (de) Elektronenkanone für eine Farbbildröhre
DE69510968T2 (de) Farbkathodenstrahlröhre
DE69013183T2 (de) Farbbildröhrensystem mit reduziertem Fleckwachstum.
DE2811355C2 (de) Elektrostatisches Elektronen-Linsensystem
DE69012503T2 (de) Farbkathodenstrahlröhre.
DE69506080T2 (de) Bildanzeigevorrichtung mit elektronenkanone, und elektronenkanone zur verwendung in einer solchen vorrichtung
DE2729932A1 (de) Kathodenstrahlroehre mit einer astigmatischen elektronenlinse
DE68928273T2 (de) Vorrichtung für eine Farbkathodenstrahlröhre
EP0014922A1 (fr) Canon à électrons
DE2010520A1 (de) Kathodenstrahlrohre
DD238473A5 (de) Schlitzmaskenelektronenkanone fuer katodenstrahlroehren
DE3225633C2 (de) Farbbildröhre
EP0138264B1 (fr) Tube-image couleurs
DE3871918T2 (de) Verwendung einer elektronenkanone fuer eine kathodenstrahlroehre.
DE69118719T2 (de) Farbkathodenstrahlröhre
DE69025634T2 (de) Farbkathodenstrahlröhre
DE1212645B (de) Elektronenstrahlroehre mit einer vierpoligen elektrostatischen Elektronenlinse

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): FR IT NL

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19811117

RIN1 Information on inventor provided before grant (corrected)

Inventor name: MUELLER, HANS

Inventor name: ANDRE, WOLFRAM