Electric lamp and discharge devices – Cathode ray tube – Screen
Patent
1991-05-23
1992-11-24
DeMeo, Palmer C.
Electric lamp and discharge devices
Cathode ray tube
Screen
358253, H01J 2989, H01J 2928
Patent
active
051665778
ABSTRACT:
A projection cathode-ray tube includes a multilayered interference film interposed between a face plate and a cathode-ray tube. In order to improve brightness in a direction of the normal, then on a face plate, a phosphor layer is composed of a first layer substantially consisting of large size phosphor particles and a second layer substantially consisting of small size phosphor particles. In addition, a phosphor density of the phosphor layer is set from 20 to 50% larger than that necessary to produce a maximum brightness on a cathode-ray tube without the multilayered interference film. The phosphor particles of the phosphor layer are preferably material having a high reflectance.
REFERENCES:
patent: 2476619 (1949-07-01), Nicoll
patent: 3517243 (1970-06-01), Jones
patent: 4172920 (1979-10-01), Kanda et al.
patent: 4642695 (1987-02-01), Iwasaki
patent: 4772818 (1988-09-01), Koike et al.
patent: 4804884 (1989-02-01), Vriens et al.
"Optimum Arrangement of Phosphor Particles in Cathode-Ray Picture Tube Screens" pp. 894-899, vol. 121, No. 7--Jul. 1974.
"A New Coolant-Sealed CRT for Projection Color TV" IEEE Transaction on Consumer Elec., vol. CE-27, No. 3, Aug., 1981.
Hashimoto Noritsuna
Iwasaki Yasuo
Nagao Chie
Okuda Hiroshi
DeMeo Palmer C.
Mitsubishi Denki & Kabushiki Kaisha
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