WO2002099834A3 - Spot optimization in a color display tube system - Google Patents

Spot optimization in a color display tube system Download PDF

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Publication number
WO2002099834A3
WO2002099834A3 PCT/IB2002/001540 IB0201540W WO02099834A3 WO 2002099834 A3 WO2002099834 A3 WO 2002099834A3 IB 0201540 W IB0201540 W IB 0201540W WO 02099834 A3 WO02099834 A3 WO 02099834A3
Authority
WO
WIPO (PCT)
Prior art keywords
display tube
color display
quadrupole
screen
phosphor
Prior art date
Application number
PCT/IB2002/001540
Other languages
French (fr)
Other versions
WO2002099834A2 (en
Inventor
Oscar H Willemsen
Marcellinus P C M Krijn
Hendrikus B Brink
Willem L Ijzerman
Albertus A S Sluyterman
Heidrun Steinhauser
Original Assignee
Koninkl Philips Electronics Nv
Lg Philips Displays Nl
Oscar H Willemsen
Marcellinus P C M Krijn
Hendrikus B Brink
Willem L Ijzerman
Albertus A S Sluyterman
Heidrun Steinhauser
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 Koninkl Philips Electronics Nv, Lg Philips Displays Nl, Oscar H Willemsen, Marcellinus P C M Krijn, Hendrikus B Brink, Willem L Ijzerman, Albertus A S Sluyterman, Heidrun Steinhauser filed Critical Koninkl Philips Electronics Nv
Publication of WO2002099834A2 publication Critical patent/WO2002099834A2/en
Publication of WO2002099834A3 publication Critical patent/WO2002099834A3/en

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
    • H01J2231/00—Cathode ray tubes or electron beam tubes
    • H01J2231/12—CRTs having luminescent screens
    • H01J2231/121—Means for indicating the position of the beam, e.g. beam indexing

Abstract

A beam-index type color display tube uses index elements to control the position of an electron beam relative to a phosphor track on the display screen. In order to ensure color purity, the spot size of the electron beam in the direction perpendicular to the phosphor screen needs to be so small, that an adjacent phosphor track is not hit by any part of the beam. The color display tube comprises a first and a second magnetic quadrupole lens for varying the opening angle of the beam close to the screen. The first quadrupole is positioned between the second quadrupole and the main lens of the electron gun, in order to ensure good color purity. A particularly good spot uniformity over the entire display screen is obtained when the two quadrupoles are dynamically driven.
PCT/IB2002/001540 2001-06-01 2002-05-07 Spot optimization in a color display tube system WO2002099834A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP01202110 2001-06-01
EP01202110.1 2001-06-01

Publications (2)

Publication Number Publication Date
WO2002099834A2 WO2002099834A2 (en) 2002-12-12
WO2002099834A3 true WO2002099834A3 (en) 2003-12-24

Family

ID=8180411

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2002/001540 WO2002099834A2 (en) 2001-06-01 2002-05-07 Spot optimization in a color display tube system

Country Status (1)

Country Link
WO (1) WO2002099834A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006084897A2 (en) * 2005-02-10 2006-08-17 Lg.Philips Displays Holding B.V. Electron gun and cathode ray tube
US7839979B2 (en) 2006-10-13 2010-11-23 Koninklijke Philips Electronics N.V. Electron optical apparatus, X-ray emitting device and method of producing an electron beam

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0507383A1 (en) * 1991-04-04 1992-10-07 Koninklijke Philips Electronics N.V. Colour display tube system
US5512802A (en) * 1992-11-30 1996-04-30 U.S. Philips Corporation Colour display tube including a convergence correction device
JPH08212947A (en) * 1994-11-21 1996-08-20 Sony Corp Beam index type cathode-ray tube
WO2000038212A1 (en) * 1998-12-21 2000-06-29 Koninklijke Philips Electronics N.V. Cathode ray tube of the index type
WO2001029867A1 (en) * 1999-10-15 2001-04-26 Koninklijke Philips Electronics N.V. Color display device with deflection means and a co-operating pair of means for influencing the distance between electron beams

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0507383A1 (en) * 1991-04-04 1992-10-07 Koninklijke Philips Electronics N.V. Colour display tube system
US5512802A (en) * 1992-11-30 1996-04-30 U.S. Philips Corporation Colour display tube including a convergence correction device
JPH08212947A (en) * 1994-11-21 1996-08-20 Sony Corp Beam index type cathode-ray tube
WO2000038212A1 (en) * 1998-12-21 2000-06-29 Koninklijke Philips Electronics N.V. Cathode ray tube of the index type
WO2001029867A1 (en) * 1999-10-15 2001-04-26 Koninklijke Philips Electronics N.V. Color display device with deflection means and a co-operating pair of means for influencing the distance between electron beams

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 12 26 December 1996 (1996-12-26) *

Also Published As

Publication number Publication date
WO2002099834A2 (en) 2002-12-12

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