(19)
(11) EP 0 843 333 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
02.06.1999 Bulletin 1999/22

(43) Date of publication A2:
20.05.1998 Bulletin 1998/21

(21) Application number: 97119888.2

(22) Date of filing: 13.11.1997
(51) International Patent Classification (IPC)6: H01J 29/70
(84) Designated Contracting States:
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

(30) Priority: 14.11.1996 JP 302714/96

(71) Applicant: Hitachi, Ltd.
Chiyoda-ku, Tokyo 101-0062 (JP)

(72) Inventors:
  • Suzuki,Kenji
    Chiba-ken 297 (JP)
  • Yoshioka,Hiroshi
    Chiba-ken 297 (JP)

(74) Representative: Beetz & Partner Patentanwälte 
Steinsdorfstrasse 10
80538 München
80538 München (DE)

   


(54) Color cathode ray tube provided with a beam convergence adjustment device


(57) A color cathode ray tube includes an evacuated envelope (1) formed of a panel portion (1A) carrying a phosphor screen (4) on an inner surface thereof, a neck portion (1B), a funnel portion (1C) connecting the panel portion and the neck portion, a three-beam, in-line type electron gun (2) housed in the neck portion for generating a center electron beam and two side electron beams, a deflection device (6), adjustable magnetic field producing device (7, 12) mounted on the neck portion for moving the two side electron beams in mutually opposing directions, and a magnetic structure mounted on the neck portion for producing such a fixed magnetic field as to move the two side electron beams in mutually opposing directions.






Search report