(19)
(11) EP 1 104 001 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
19.11.2003 Bulletin 2003/47

(43) Date of publication A2:
30.05.2001 Bulletin 2001/22

(21) Application number: 00403293.4

(22) Date of filing: 24.11.2000
(51) International Patent Classification (IPC)7: H01J 29/89
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 24.11.1999 JP 33347299
02.03.2000 JP 2000061859

(71) Applicant: SONY CORPORATION
Tokyo (JP)

(72) Inventors:
  • Takeuchi, Hiromitsu
    Shinagawa-ku, Tokyo (JP)
  • Okada, Hideki
    Shinagawa-ku, Tokyo (JP)
  • Kouno, Yoji
    Shinagawa-ku, Tokyo (JP)

(74) Representative: Thévenet, Jean-Bruno et al
Cabinet Beau de Loménie 158, rue de l'Université
75340 Paris Cédex 07
75340 Paris Cédex 07 (FR)

   


(54) Flat cathode ray tube and picture display device using the same


(57) A flat cathode ray tube (CRT) capable of producing clear pictures and a picture display device using the flat CRT. A light-attenuation film (17) having a light-attenuating action is attached to the front surface of a front panel (12). The quantity of light of an extraneous ray passing into the front panel (12) is reduced by the light-attenuation film (17) when passing through the front panel (12) and when reflected by a phosphor layer. The quantity of light of a ray for picture formation is also reduced by the light-attenuation film (17). However, the quantity of light reduced in the case of the ray for picture formation is smaller relatively to that of the extraneous ray. Thus, a picture observed becomes clearer.






Search report