(19)
(11) EP 0 448 108 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
12.08.1992 Bulletin 1992/33

(43) Date of publication A2:
25.09.1991 Bulletin 1991/39

(21) Application number: 91104469.1

(22) Date of filing: 21.03.1991
(51) International Patent Classification (IPC)5: B41J 2/45, G06K 15/12
(84) Designated Contracting States:
DE FR GB

(30) Priority: 23.03.1990 JP 75112/90

(71) Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
Tokyo (JP)

(72) Inventors:
  • Samejima, Kazuhiro, c/o Mitsubishi Denki K.K.
    Kamakura-shi, Kanagawa-ken (JP)
  • Shoji, Toshiaki, c/o Mitsubishi Denki K.K.
    8-chome, Amagasaki-shi, Hyogo-ken (JP)

(74) Representative: Sajda, Wolf E., Dipl.-Phys. et al
MEISSNER, BOLTE & PARTNER Widenmayerstrasse 48
D-80538 München
D-80538 München (DE)


(56) References cited: : 
   
       


    (54) Optical print head


    (57) An optical print head comprises light-emitting elements (3) disposed on a substrate (2) having a light-emitting surface opposite to the substrate (2), and a transparent mold member (11) covering the light-emitting elements (3) and the surface of the substrate (2) at the area surrounding the areas where the light-emitting elements (3) are disposed. The surface of the mold member (11) is more receded toward the substrate (2) at the neighboring area than at the areas where the light-emitting elements (3) are disposed and covered with the mold member (11). Because the light-emitting elements (3) are covered with the mold member (11), any corrosion thereof is prevented. Moreover, since the mold member (11) is transparent, any light emitted from the light-emitting elements (3) is not absorbed. Furthermore, degradation in recording quality due to scattering and multiple reflection of the light emitted from the light-emitting elements (3) toward the inside of the transparent mold member (11), and unnecessary leakage is avoided, so that an optical print head with a high recording quality is obtained.






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