(19)
(11) EP 1 098 348 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
17.07.2002 Bulletin 2002/29

(43) Date of publication A2:
09.05.2001 Bulletin 2001/19

(21) Application number: 00403032.6

(22) Date of filing: 31.10.2000
(51) International Patent Classification (IPC)7: H01J 9/227, H01J 29/32, H01J 29/18
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 05.11.1999 IT MI992325

(71) Applicant: VIDEOCOLOR S.p.A.
03012 Anagni (IT)

(72) Inventors:
  • Pezzulo, Antimo
    92648 Boulogne Cédex (FR)
  • Palumbo, Alfredo,
    92648 Boulogne Cédex (FR)
  • Salani, Giorgio,
    92648 Boulogne Cédex (FR)

(74) Representative: Zhang, Jianguo et al
THOMSON multimedia, 46 quai A. Le Gallo
92648 Boulogne Cédex
92648 Boulogne Cédex (FR)

   


(54) Color cathode ray tube and manufacture for contrast improvement


(57) The invention relates to a method of manufacturing a colour cathode-ray tube, in which a graphite coating (22) of variable thickness is interposed between the glass faceplate (2) of the tube and the phosphors (25, 26, 27) intended to reproduce a colour image. The purpose of the coating (22) is to reduce the transmission of the glass, of which the faceplate is composed, to a defined value.






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