EP0019249B1 - Elektronenstrahl-Erzeugungssystem für Kathodenmehrstrahlröhren - Google Patents

Elektronenstrahl-Erzeugungssystem für Kathodenmehrstrahlröhren Download PDF

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Publication number
EP0019249B1
EP0019249B1 EP80102604A EP80102604A EP0019249B1 EP 0019249 B1 EP0019249 B1 EP 0019249B1 EP 80102604 A EP80102604 A EP 80102604A EP 80102604 A EP80102604 A EP 80102604A EP 0019249 B1 EP0019249 B1 EP 0019249B1
Authority
EP
European Patent Office
Prior art keywords
electron
electrodes
electrode
materials
cathodes
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
EP80102604A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0019249A1 (de
Inventor
Hans Dr. Reule
Harmut Gänzle
Horst Hans Vogel
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.)
Nokia Deutschland GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6071114&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0019249(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of EP0019249A1 publication Critical patent/EP0019249A1/de
Application granted granted Critical
Publication of EP0019249B1 publication Critical patent/EP0019249B1/de
Expired legal-status Critical Current

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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
    • H01J29/484—Eliminating deleterious effects due to thermal effects, electrical or magnetic fields; Preventing unwanted emission

Definitions

  • the invention relates to an electron beam generating system for cathode multi-beam tubes with a plurality of cathodes and subsequent electrodes one behind the other with passage holes for the electrons assigned to the individual cathodes, each of which has a common electrode, the individual electrodes being at different temperatures which increase towards the cathodes during operation .
  • An electron beam generation system of the type mentioned at the outset is known from DE-A-2 511 758, in which, based on this problem, it was pointed out that it was expedient to improve the convergence properties in that at least the support members of the control electrode were made from a material with a linear coefficients of expansion of less than 80. 10- 7 O C- 1 exist.
  • control electrode in order to avoid a thermal change in the distance between the control electrode and the cathode, the control electrode consists of a metal whose coefficient of thermal expansion is equal to or less than that of a metal sleeve carrying the cathode.
  • the object of the invention is to design a generic electron beam generation system for cathode multi-beam tubes in such a way that the misalignment of the electron optics and also the mechanical stresses due to the thermal expansion of the individual electrodes are substantially reduced.
  • this object is achieved in that the materials for the individual electrodes are selected with respect to their thermal expansion coefficients such that the ratio of the difference in the thermally induced changes in the distance of the electron passage holes in two adjacent electrodes to the distance between the planes of the electron passage holes in the two adjacent ones Electrodes for the whole electrode system is essentially constant.
  • FIG. 1 shows a longitudinal section through an electron beam generating system in inline technology with three electron beam generators arranged next to one another, the electrodes 1 to 4 of which, viewed in the beam direction, lie one behind the other in the planes E1 to E4. It should be noted here that the cut surface is selected such that glass rods and holding elements of the electrodes have also been cut.
  • the electrodes 1 to 4 are melted into the glass rods 6 either directly or via holding parts 5.
  • the mutual spacing of the holes is 6.6 mm at room temperature. The change in the distance from center to center of the holes at different temperatures is taken as a measure of the thermal expansion of the electrode.
  • the electrodes heat up to different temperatures during operation.
  • the temperatures of the electrodes 1 to 4 are entered, which are in the levels E1 to E4, where t is the time after the cathode heating is switched on.
  • the distance between the holes changes due to the thermal expansion of the electrode materials.
  • each of the electrodes 1 to 4 is at a constant temperature in the operating state.
  • 2 and 3 which illustrate the differences between the prior art and the invention, is based on the simplified assumption that electrodes 1 to 4 are each concentrated in a disk which is arranged in planes E1 to E4.
  • the electrodes of two levels can also consist of the same material, since fewer materials then have to be checked for their suitability and kept in stock than if the electrode material is different for each level.
  • the cathode current has proven to be a sensitive means of detection for mechanical stresses in the system.
  • the positive voltage of electrodes 2 and 3 is then set such that a cathode current of 100 pA flows in the stationary state. After this setting, the system is allowed to cool and then the cathode current is measured after switching on again.
  • the electrode materials of which are matched according to the invention with regard to thermal expansion errors which are based on a mutual displacement of the holes 7 in the beam direction, such as e.g. B. time convergence errors, significantly reduce compared to known arrangements.

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)
  • Electron Sources, Ion Sources (AREA)
EP80102604A 1979-05-18 1980-05-10 Elektronenstrahl-Erzeugungssystem für Kathodenmehrstrahlröhren Expired EP0019249B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2920151A DE2920151C2 (de) 1979-05-18 1979-05-18 Elektronenstrahlerzeugungssystem für Kathodenmehrstrahlröhren
DE2920151 1979-05-18

Publications (2)

Publication Number Publication Date
EP0019249A1 EP0019249A1 (de) 1980-11-26
EP0019249B1 true EP0019249B1 (de) 1984-08-01

Family

ID=6071114

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80102604A Expired EP0019249B1 (de) 1979-05-18 1980-05-10 Elektronenstrahl-Erzeugungssystem für Kathodenmehrstrahlröhren

Country Status (9)

Country Link
US (1) US4492894A (pl)
EP (1) EP0019249B1 (pl)
JP (1) JPS569951A (pl)
DD (1) DD153019A5 (pl)
DE (1) DE2920151C2 (pl)
ES (1) ES491486A0 (pl)
FI (1) FI71852C (pl)
MX (1) MX147545A (pl)
PL (1) PL133009B1 (pl)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4460845A (en) * 1981-12-01 1984-07-17 Rca Corporation Rigid cathode support structure for an in-line electron gun assembly
US4468588A (en) * 1982-02-10 1984-08-28 Rca Corporation Cathode support structure for an in-line electron gun assembly
US4386059A (en) * 1982-05-07 1983-05-31 Nl Industries, Inc. Zinc hydroxy phosphite complex
DE3334242A1 (de) * 1983-09-22 1985-04-04 Standard Elektrik Lorenz Ag, 7000 Stuttgart Elektronenstrahlerzeugungssystem fuer mehrfachkathodenstrahlroehren, wie farbbildroehren
JP2553035B2 (ja) * 1985-06-19 1996-11-13 株式会社日立製作所 カラ−受像管用電子銃
JP2815169B2 (ja) * 1989-03-18 1998-10-27 株式会社日立製作所 インライン型電子銃
US4952186A (en) * 1989-10-24 1990-08-28 Rca Licensing Corporation Method of making a color picture tube electron gun with reduced convergence drift
US5010271A (en) * 1989-10-24 1991-04-23 Rca Licensing Corporation Color picture tube having an electron gun with reduced convergence drift
FR2868597B1 (fr) * 2004-03-30 2007-01-12 Thomson Licensing Sa Canon a electrons pour tube a rayons cathodiques a zone de formation des faisceaux amelioree

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT152248B (de) * 1935-09-27 1938-01-10 Aeg Elektrodensystem für Braun'sche Röhren.
DE1789103B2 (de) * 1962-07-06 1973-04-26 RCA Corp , New York, NY (V St A ) Kathodenanordnung fuer eine kathodenstrahlroehre
US3250935A (en) * 1964-08-04 1966-05-10 Kentucky Electronics Inc Matrix multiple gun assembly for cathode ray tube
DE1514920A1 (de) * 1966-01-28 1969-06-26 Telefunken Patent Elektronenstrahlroehre
US3462629A (en) * 1966-05-09 1969-08-19 Stromberg Carlson Corp Self-aligning electron gun construction
US3983446A (en) * 1971-07-06 1976-09-28 Varian Associates Gridded convergent flow electron gun for linear beam tubes
JPS4911649U (pl) * 1972-05-09 1974-01-31
JPS4932855U (pl) * 1972-06-26 1974-03-22
JPS4992759U (pl) * 1972-12-04 1974-08-10
NL7404365A (nl) * 1974-04-01 1975-10-03 Philips Nv Kathodestraalbuis voor het weergeven van gekleurde beelden.
DE2541886C2 (de) * 1974-09-19 1983-01-13 Tokyo Shibaura Electric Co., Ltd., Kawasaki, Kanagawa Elektronenstrahlerzeugungsanordnung mit mindestens einer Elektronenkanoneneinheit
CA1068323A (en) * 1976-02-05 1979-12-18 Horst H. Blumenberg Unitized electron gun having electrodes with internal beam-shielding tubes
DE2642582A1 (de) * 1976-09-22 1978-03-23 Licentia Gmbh Kathodenstrahlroehre
DE2642560C2 (de) * 1976-09-22 1983-08-04 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Farbbildkathodenstrahlröhre

Also Published As

Publication number Publication date
EP0019249A1 (de) 1980-11-26
MX147545A (es) 1982-12-13
FI71852B (fi) 1986-10-31
FI71852C (fi) 1987-02-09
FI801562A (fi) 1980-11-19
DD153019A5 (de) 1981-12-16
DE2920151A1 (de) 1980-12-18
ES8101324A1 (es) 1980-12-16
ES491486A0 (es) 1980-12-16
PL224255A1 (pl) 1981-04-24
JPS569951A (en) 1981-01-31
JPH0234137B2 (pl) 1990-08-01
DE2920151C2 (de) 1985-04-11
US4492894A (en) 1985-01-08
PL133009B1 (en) 1985-04-30

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