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1. CA2081200 - TUBE-IMAGE A ECRAN LARGE A AUTO-CONCENTRATION

Office Canada
Numéro de la demande 2081200
Date de la demande 10.05.1991
Numéro de publication 2081200
Date de publication 28.11.1991
Numéro de délivrance
Date de délivrance 18.12.2001
Type de publication C
CIB
H01J 29/76
HÉLECTRICITÉ
01ÉLÉMENTS ÉLECTRIQUES FONDAMENTAUX
JTUBES À DÉCHARGE ÉLECTRIQUE OU LAMPES À DÉCHARGE ÉLECTRIQUE
29Détails des tubes à rayons cathodiques ou des tubes à faisceau électronique des types couverts par le groupe H01J31/137
46Dispositions des électrodes et des pièces associées en vue de produire ou de commander le rayon ou le faisceau, p.ex. dispositifs électronoptiques
70Dispositions pour la déviation du rayon ou du faisceau
72suivant une ligne droite ou suivant deux lignes droites perpendiculaires
76Déviation au moyen de champs magnétiques uniquement
CPC
H01J 29/76
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
29Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
46Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
70Arrangements for deflecting ray or beam
72along one straight line or along two perpendicular straight lines
76Deflecting by magnetic fields only
H01J 2229/862
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
2229Details of cathode ray tubes or electron beam tubes
86Vessels and containers
8613Faceplates
8616characterised by shape
862Parameterised shape, e.g. expression, relationship or equation
Déposants THOMSON TUBES AND DISPLAYS, S.A.
Inventeurs MILILI, MARC
JOHNSON, JEFFREY PAUL
CARRIER, JEAN-MICHEL
Données relatives à la priorité 90401265 11.05.1990 EP
Titre
(EN) SELF CONVERGING WIDE SCREEN COLOR PICTURE TUBE SYSTEM
(FR) TUBE-IMAGE A ECRAN LARGE A AUTO-CONCENTRATION
Abrégé
(EN)
A self converging, widescreen color picture tube system includes a widescreen, in-line color picture tube having a funnel, an electron gun assembly (28) for three in-line electron beams located in a neck at one end of the picture tube, and a faceplate with a viewing screen at the other end. The picture tube has a wide aspect ratio. A self converging widescreen deflection yoke (40) for deflecting the electron beams in the wide aspect ratio picture tube includes horizontal and vertical deflection windings. The yoke (40) is located by an initial flare section of the funnel and positioned along the longitudinal axis of the picture tube to make the tube reference line and the yoke deflection plane substantially coincident. To achieve substantial horizontal astigmatism cor- rection at the extremes of the major axis of the wide viewing screen, the horizontal deflection winding is constructed to have a generally pincushion-shaped horizontal deflection field over the effective length of the field. The field is modified from that re- quired of the horizontal deflection field in a comparable self converging narrowscreen yoke. The modification is made in accord- ance with the differences in centerscreen slope angles and S-spacing.