EP0247470B1 - Elektronenstrahlerzeugungssystem - Google Patents

Elektronenstrahlerzeugungssystem Download PDF

Info

Publication number
EP0247470B1
EP0247470B1 EP87107145A EP87107145A EP0247470B1 EP 0247470 B1 EP0247470 B1 EP 0247470B1 EP 87107145 A EP87107145 A EP 87107145A EP 87107145 A EP87107145 A EP 87107145A EP 0247470 B1 EP0247470 B1 EP 0247470B1
Authority
EP
European Patent Office
Prior art keywords
electron beam
embossing
beam generating
grid
indentations
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 - Lifetime
Application number
EP87107145A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0247470A2 (de
EP0247470A3 (en
Inventor
Karl Kniesser
Bernhard Prof. Dr. Lau
Walter Kornaker
Werner Schanz
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.)
Panasonic Holdings Corp
Original Assignee
Nokia Deutschland GmbH
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 Nokia Deutschland GmbH filed Critical Nokia Deutschland GmbH
Publication of EP0247470A2 publication Critical patent/EP0247470A2/de
Publication of EP0247470A3 publication Critical patent/EP0247470A3/de
Application granted granted Critical
Publication of EP0247470B1 publication Critical patent/EP0247470B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01J29/50—Electron guns two or more guns in a single vacuum space, e.g. for plural-ray tube
    • H01J29/503—Three or more guns, the axes of which lay in a common plane

Definitions

  • the invention relates to an electron gun for color picture tubes according to the preamble of claim 1.
  • EP-B-45 547 such an electron gun which has at least two grid electrodes.
  • embossments are present on both sides in the area of the passage openings for the electron beams.
  • the embossing of both sides takes place essentially simultaneously and their surfaces run parallel to one another and to the surfaces of the grid electrode.
  • the pressure is so high that the embossing tools can break or have a very short service life.
  • the invention has for its object an electron gun of the aforementioned Specify the type in which the grid electrodes are designed with a view to cost-effective production.
  • Fig. 1 only a part of a color picture tube for better overview is shown and this is then shown in section. The cut was made along the horizontal axis of the color picture tube.
  • the color picture tube essentially consists of the screen trough 1 with the fluorescent screen 2 applied to the inner surface, the shadow mask 3 attached in front of it and the piston 4 which merges into the piston neck 5.
  • the deflection unit 6 and in it the electron beam generating system is mounted on the piston neck.
  • the electron gun has three cathodes 7, which are surrounded by grid electrodes 8, the Wehnelt cylinders.
  • the following screen grid, focusing electrodes and anodes are designated 9, 10 and 11, respectively. This is followed by a convergence pot 12.
  • This structure of the electron gun can consist of individual electron guns or an integrated system. It is advantageous if individual electrodes of the system are designed so that they can be telescopically inserted into one another.
  • the usual glass rods for holding the electron gun are not shown.
  • the number of electrodes in each electron gun is not limited to four.
  • the electron beams produced by the electron beam generation system are denoted by 13. Only the left and right ends of the tube axis 14, which represents the axis of symmetry of the color picture tube, are shown.
  • FIG. 2 shows a section through a grid electrode 8 or 9, which is only partially shown.
  • the base surface 18 of the embossing runs parallel to the side 15 and is at a distance t from it.
  • embossing 20 On the side 19 of the grid electrode 8 or 9 facing the cathodes 7 there is an embossing 20 which is opposite the embossing 17. This embossing is circular and its diameter is labeled D.
  • the base surface 21 of the embossing 20 is concave.
  • the associated radius R is approximately 10 to 30 mm.
  • the Distance between the two base surfaces 18 and 21 is denoted by d.
  • the center of the concave embossment 20 lies on the axis of the passage opening 16.
  • the material of the electrodes 8 and 9 can flow better to the outside in the area of the passage opening 16 during embossing. This creates less pressure during the stamping process and the stamping tool is not exposed to such a high load.
  • this embossing can also have the shape of a truncated cone, which is shown in FIG. 3.
  • the drawn opening angle ⁇ of the truncated cone is slightly less than 180 °.
  • the embossing 20 it being important in each case that the distance d between the base areas 18 and 21 in the vicinity of the passage opening 16 is less than at the edge 18, where the distance is denoted by d ⁇ .
  • the concave design of the embossing or its design in the form of a truncated cone can also be carried out in the embossing 17, the embossing 20 then having a rectangular shape.

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
EP87107145A 1986-05-23 1987-05-18 Elektronenstrahlerzeugungssystem Expired - Lifetime EP0247470B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863617432 DE3617432A1 (de) 1986-05-23 1986-05-23 Elektronenstrahlerzeugungssystem
DE3617432 1986-05-23

Publications (3)

Publication Number Publication Date
EP0247470A2 EP0247470A2 (de) 1987-12-02
EP0247470A3 EP0247470A3 (en) 1989-04-19
EP0247470B1 true EP0247470B1 (de) 1992-04-22

Family

ID=6301511

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87107145A Expired - Lifetime EP0247470B1 (de) 1986-05-23 1987-05-18 Elektronenstrahlerzeugungssystem

Country Status (5)

Country Link
US (1) US4891549A (ja)
EP (1) EP0247470B1 (ja)
JP (2) JPS62278741A (ja)
CA (1) CA1281360C (ja)
DE (2) DE3617432A1 (ja)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3718838A1 (de) * 1987-06-05 1988-12-15 Standard Elektrik Lorenz Ag Elektronenstrahlerzeugersystem
DE3829794A1 (de) * 1988-09-02 1990-03-15 Nokia Unterhaltungselektronik In-line-farbbildroehre
FR2647260B1 (fr) * 1989-05-19 1996-07-05 Thomson Tubes Electroniques Electrode de commande pour canon a electrons de tube a rayons cathodiques
US5159240A (en) * 1991-12-09 1992-10-27 Chunghwa Picture Tubes, Ltd. Low voltage limiting aperture electron gun
JPH05325828A (ja) * 1992-05-26 1993-12-10 Hitachi Ltd 陰極線管
KR970008566B1 (ko) * 1994-07-07 1997-05-27 엘지전자 주식회사 칼라 음극선관용 전자총의 제2그리드
JP3429593B2 (ja) * 1995-02-13 2003-07-22 株式会社日立製作所 カラー陰極線管
US5847500A (en) * 1995-03-02 1998-12-08 Hitachi, Ltd. Electron gun for color cathode ray tube and method of manufacturing the electron gun electrode
KR100186540B1 (ko) 1996-04-25 1999-03-20 구자홍 피디피의 전극 및 그 형성방법
US6798526B2 (en) * 2002-09-12 2004-09-28 Seh America, Inc. Methods and apparatus for predicting oxygen-induced stacking fault density in wafers
DK2018160T3 (da) 2006-03-16 2012-02-06 Tris Pharma Inc Modificeret depotformuleringer indeholdende lægemiddel-ionbytterharpikskomplekser
DK2884961T3 (en) 2012-08-15 2019-04-23 Tris Pharma Inc METHYLPHENIDATE TABLE WITH EXTENDED RELEASE
US11590228B1 (en) 2015-09-08 2023-02-28 Tris Pharma, Inc Extended release amphetamine compositions
US11590081B1 (en) 2017-09-24 2023-02-28 Tris Pharma, Inc Extended release amphetamine tablets

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE759247A (fr) * 1969-11-22 1971-05-21 Philips Nv Dispositif muni d'un tube electronique, et tube electronique destine a un tel dispositif
JPS6034783B2 (ja) * 1976-07-29 1985-08-10 株式会社東芝 陰極線管
JPS54117677A (en) * 1978-03-06 1979-09-12 Hitachi Ltd Electron gun
JPS55154044A (en) * 1979-05-18 1980-12-01 Hitachi Ltd Electrode structure of electron gun and its manufacture
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
EP0045547B1 (en) * 1980-08-04 1984-09-26 Philips ECG Inc. Method of fabricating an electron gun electrode member for a cathode-ray tube and cathode ray tube comprising an electron gun electrode member fabricated by this method
US4500808A (en) * 1982-04-02 1985-02-19 Rca Corporation Multibeam electron gun with composite electrode having plurality of separate metal plates
JPS59157936A (ja) * 1983-02-24 1984-09-07 Mitsubishi Electric Corp インラインカラ−ブラウン管用電子銃
US4661741A (en) * 1985-06-28 1987-04-28 Control Data Corporation Miniature electron gun with focusing grid structure

Also Published As

Publication number Publication date
JPS62278741A (ja) 1987-12-03
US4891549A (en) 1990-01-02
CA1281360C (en) 1991-03-12
DE3778422D1 (de) 1992-05-27
DE3617432C2 (ja) 1991-07-18
JP2574834Y2 (ja) 1998-06-18
EP0247470A2 (de) 1987-12-02
EP0247470A3 (en) 1989-04-19
JPH0626143U (ja) 1994-04-08
DE3617432A1 (de) 1987-11-26

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