(19)
(11) EP 0 248 426 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
03.05.1989 Bulletin 1989/18

(43) Date of publication A2:
09.12.1987 Bulletin 1987/50

(21) Application number: 87108095.8

(22) Date of filing: 04.06.1987
(51) International Patent Classification (IPC)4: H01J 29/45, H01J 31/38, H01J 29/56
(84) Designated Contracting States:
DE FR GB

(30) Priority: 04.06.1986 JP 127978/86

(71) Applicants:
  • HITACHI, LTD.
    Chiyoda-ku, Tokyo 101 (JP)
  • NIPPON HOSO KYOKAI
    Tokyo 150 (JP)

(72) Inventors:
  • Takasaki, Yukio
    Kawasaki-shi (JP)
  • Hirai, Tadaaki
    Koganei-shi (JP)
  • Maruyama, Masanori
    Tokorozawa-shi (JP)
  • Nonaka, Yasuhiko
    Mobara-shi (JP)
  • Inoue, Eisuke
    Mobara-shi (JP)
  • Kato, Shinichi
    Mobara-shi (JP)
  • Shidara, Keiichi
    Tama-shi (JP)
  • Kurashige, Mitsuhiro
    Tachikawa-shi (JP)
  • Tanioka, Kenkichi
    Setagaya-ku Tokyo (JP)
  • Okazaki, Saburo
    Tama-shi (JP)
  • Yamazaki, Junichi
    Asao-ku Kawasaki-shi (JP)
  • Egami, Norifumi
    Setagaya-ku Tokyo (JP)

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


(56) References cited: : 
   
       


    (54) TV pick-up tube


    (57) The invention relates to a photo-conductive TV pick-up tube in which the capacity of the photo-conductive film (5) is 15 to 150 µF/m2, whereby it is possible to use a thin scanning electron beam and to markedly improve the resolution of the pick-up tube.





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