Electric lamp and discharge devices – Cathode ray tube – Screen
Patent
1997-04-22
1999-08-10
O'Shea, Sandra
Electric lamp and discharge devices
Cathode ray tube
Screen
313467, 313469, 313473, 313477R, H01J 2910, H01J 3100
Patent
active
059363398
ABSTRACT:
A color image receiving tube comprising three color (red, green and blue) phosphor screens on an inner surface of a face-plate; wherein at least two of said three color phosphor screens are coated with pigments; and wherein said three color phosphor screens have a total reflective brightness less than 70% that of three color phosphor screens with no pigment coating. According to the above-mentioned constitution, a color image receiving tube having a higher emisson brightness and contrast is achieved as compared to a color image receiving tube having the same reflective brightness, where the reflective brightness is obtained by lowering the light transmittance of its face-plate.
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Hayama et al. "Crystal Pigment Screen for Wide CRTs" National Technical Report, vol. 42, No. 3, pp. 101-107 (Abstract).
Carl et al. "The Pigmentation of Phosphors for Colour Television" Philips Technical Review, vol. 40, no. 2-3, pp. 48-53.
Trond "Filter Phosphors" SID International Symposium, Digest of technical Papers, pp. 170-171.
Communication from European Patent Office and attached Search Report.
Gotoh Masao
Hayama Hidekazu
Takahashi Toshihide
Tani Naoyuki
Haynes Mack
Matsushita Electronics Corporation
O'shea Sandra
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