Process for manufacture of color cathode-ray tube

Details Process for manufacture of color cathode-ray tube Process for manufacture of color cathode-ray tube

1996-07-17

1999-01-12

Beck, Shrive

Electric lamp and discharge devices

Cathode ray tube

427 64, 427 68, 427 71, 4271262, 427157, 427162, 313461, 313467, 313525, B05D 506, H01J 2910, H01J 2900, H01J 4018

Patent

active

058594949

ABSTRACT:
The present invention relates to a process for manufacture of color cathode-ray tube for preventing the deterioration of color purity of red phosphor while enhancing the brightness and the contrast of color cathode-ray tube, which comprises steps of forming a black matrix film corresponding to 3 colors of green(G), blue(B) and red(R) onto the panel glass by using 0.067-0.075 g atom (content relative to 1 mol of Y.sub.2 O.sub.3) of europium(Eu) as an activator for red phosphor; forming a 3 color fluorescent film onto said black matrix film, wherein said 3 color fluorescent film consists of green phosphor, red phosphor to which predetermined amount of red pigment having 50-70% of reflectance has been adhered, and blue phosphor to which predetermined amount of blue pigment having 50-65% of reflectance has been adhered; coating an organic film on the 3 color fluorescent film; forming a metal reflective film thereon; and thermally decomposing the organic film at high temperature to obtain a fluorescent plane.

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patent: 4307320 (1981-12-01), Kotera et al.
patent: 5073463 (1991-12-01), Fujita
patent: 5178906 (1993-01-01), Patel et al.
patent: 5340673 (1994-08-01), Tateyama et al.
patent: 5369331 (1994-11-01), Mizukami et al.

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