(19)
(11) EP 0 111 297 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
04.09.1985 Bulletin 1985/36

(43) Date of publication A2:
20.06.1984 Bulletin 1984/25

(21) Application number: 83112272

(22) Date of filing: 06.12.1983
(84) Designated Contracting States:
DE FR GB

(30) Priority: 07.12.1982 JP 21484982
28.12.1982 JP 23068382

(71) Applicant: KABUSHIKI KAISHA TOSHIBA
 ()

(72) Inventors:
  • Arai, Kimiyoshi
     ()
  • Kimata, Shigeki
     ()
  • Takamatsu, Hiroyuki
     ()
  • Kozuchi, Yuichi
     ()

   


(54) Thermal printing apparatus


(57) A thermal printing apparatus is provided with a thermal printing section (22) for selectively heating a heatsensitive color developing printing medium coated with diazonium compound to form an image thereon, and a photo-fixing section (24) for illuminating the printing medium thermally printed with light to fix the image formed. In the photo-fixing section (24), the printing medium is illuminated with normal light, for example, light from a fluorescent lamp, and an amount of normal light is always detected. When the light amount is insufficient, the light amount is compensated for by lighting an auxilliary fluorescent lamp (120), increasing the lamp current, or the like






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