CA2039501A1 - Color picture tube having inline electron gun with focus adjustement means - Google Patents

Color picture tube having inline electron gun with focus adjustement means

Info

Publication number
CA2039501A1
CA2039501A1 CA2039501A CA2039501A CA2039501A1 CA 2039501 A1 CA2039501 A1 CA 2039501A1 CA 2039501 A CA2039501 A CA 2039501A CA 2039501 A CA2039501 A CA 2039501A CA 2039501 A1 CA2039501 A1 CA 2039501A1
Authority
CA
Canada
Prior art keywords
lens
focus
beams
picture tube
color picture
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.)
Granted
Application number
CA2039501A
Other languages
French (fr)
Other versions
CA2039501C (en
Inventor
Loren Lee Maninger
Bruce George Marks
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.)
Technicolor USA Inc
Original Assignee
Thomson Consumer Electronics 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 Thomson Consumer Electronics Inc filed Critical Thomson Consumer Electronics Inc
Publication of CA2039501A1 publication Critical patent/CA2039501A1/en
Application granted granted Critical
Publication of CA2039501C publication Critical patent/CA2039501C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H01J29/50—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
    • 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
    • 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
    • H01J29/58—Arrangements for focusing or reflecting ray or beam
    • H01J29/62—Electrostatic lenses
    • H01J29/622—Electrostatic lenses producing fields exhibiting symmetry of revolution
    • H01J29/624—Electrostatic lenses producing fields exhibiting symmetry of revolution co-operating with or closely associated to an electron gun
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/48—Electron guns
    • H01J2229/4844—Electron guns characterised by beam passing apertures or combinations
    • H01J2229/4848—Aperture shape as viewed along beam axis
    • H01J2229/4872—Aperture shape as viewed along beam axis circular
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/48—Electron guns
    • H01J2229/4844—Electron guns characterised by beam passing apertures or combinations
    • H01J2229/4848—Aperture shape as viewed along beam axis
    • H01J2229/4896—Aperture shape as viewed along beam axis complex and not provided for

Landscapes

  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Electron Sources, Ion Sources (AREA)

Abstract

A color picture tube has a viewing screen and an electron gun for generating and directing three inline electron beams, a center beam and two side beams, toward the screen.
The gun includes electrodes that form three focus lenses. A first lens is located in a beam-forming region of the gun. A second lens includes at least one electrode for providing asymmetrically-shaped beams to a third lens. The third lens is a common main focus lens for all three beams. The improvement comprises one of the electrodes of the third lens being shaped to provide a major amount of focus correction for each individual electron beam, and the one electrode of the second lens including means for providing the remaining amounts of focus correction needed to substantially totally correct each individual electron beam.
CA002039501A 1990-04-16 1991-04-04 Color picture tube having inline electron gun with focus adjustement means Expired - Fee Related CA2039501C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US50953790A 1990-04-16 1990-04-16
US509537 1990-04-16

Publications (2)

Publication Number Publication Date
CA2039501A1 true CA2039501A1 (en) 1991-10-17
CA2039501C CA2039501C (en) 1999-02-02

Family

ID=24027042

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002039501A Expired - Fee Related CA2039501C (en) 1990-04-16 1991-04-04 Color picture tube having inline electron gun with focus adjustement means

Country Status (10)

Country Link
EP (1) EP0452789B1 (en)
JP (1) JP2616849B2 (en)
KR (1) KR950002262B1 (en)
CN (1) CN1041577C (en)
CA (1) CA2039501C (en)
DE (1) DE69114893T2 (en)
MY (1) MY105411A (en)
PL (1) PL165538B1 (en)
RU (1) RU2025818C1 (en)
TR (1) TR25229A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06251722A (en) * 1993-02-24 1994-09-09 Hitachi Ltd Cathode-ray tube
FR2705164B1 (en) * 1993-05-10 1995-07-13 Thomson Tubes & Displays Color image tube with electron guns in line with astigmatic lenses.
CN1054462C (en) * 1994-06-30 2000-07-12 中华映管股份有限公司 Colour kinescope electron gun with hollow chain-shaped mainlens and unidirectional extension hole circular symmetric auxiliary lens
JP3726402B2 (en) * 1996-07-05 2005-12-14 ソニー株式会社 In-line electron gun for color cathode ray tube
KR19980040898A (en) * 1996-11-30 1998-08-17 엄길용 Cylindrical electrode of in-line electron gun
KR20030060616A (en) * 2002-01-10 2003-07-16 엘지.필립스디스플레이(주) Gun for Color CRT
CN1306544C (en) * 2004-01-05 2007-03-21 彩虹集团电子股份有限公司 Technological method for regulating clour teletron electron beam arrangement

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2509526B1 (en) * 1981-07-10 1986-08-29 Rca Corp IMPROVEMENTS TO ONLINE ELECTRONIC GUNS WITH EXTENDED FOCAL LENS FOR COLOR IMAGE TUBE
US4400649A (en) * 1981-07-10 1983-08-23 Rca Corporation Color picture tube having an improved expanded focus lens type inline electron gun
JPS58198830A (en) * 1982-05-14 1983-11-18 Hitachi Ltd Cathode-ray tube
NL8203322A (en) * 1982-08-25 1984-03-16 Philips Nv COLOR IMAGE TUBE.
JPH0630227B2 (en) * 1983-12-28 1994-04-20 株式会社東芝 Color picture tube electron gun
FR2590724B1 (en) * 1985-11-22 1988-01-08 Videocolor DEVICE FOR CORRECTING THE DEVIATION EFFECT DUE TO A VARIATION OF THE FOCUSING VOLTAGE IN A TRICHROME CATHODE TUBE WITH ONLINE CATHODES
US4764704A (en) * 1987-01-14 1988-08-16 Rca Licensing Corporation Color cathode-ray tube having a three-lens electron gun
DE3854506T2 (en) * 1987-01-14 1996-04-04 Rca Thomson Licensing Corp Color picture tube with a three-lens electron gun.
CN1013534B (en) * 1987-04-08 1991-08-14 彩色图象公司 Correction device of diviation effect for a three colour crt
US4737682A (en) * 1987-07-20 1988-04-12 Rca Corporation Color picture tube having an inline electron gun with an einzel lens
JP2690930B2 (en) * 1988-02-26 1997-12-17 株式会社日立製作所 Electron gun for color cathode ray tube

Also Published As

Publication number Publication date
DE69114893D1 (en) 1996-01-11
TR25229A (en) 1993-01-01
EP0452789A3 (en) 1992-02-12
EP0452789A2 (en) 1991-10-23
CA2039501C (en) 1999-02-02
CN1056016A (en) 1991-11-06
PL165538B1 (en) 1995-01-31
JP2616849B2 (en) 1997-06-04
JPH04230938A (en) 1992-08-19
DE69114893T2 (en) 1996-06-20
EP0452789B1 (en) 1995-11-29
PL289904A1 (en) 1992-02-10
RU2025818C1 (en) 1994-12-30
CN1041577C (en) 1999-01-06
MY105411A (en) 1994-09-30
KR910019103A (en) 1991-11-30
KR950002262B1 (en) 1995-03-15

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed