Cathode-ray tube for color display with separate fluorescent lay

Details Cathode-ray tube for color display with separate fluorescent lay Cathode-ray tube for color display with separate fluorescent lay

1983-03-17

1985-09-10

Demeo, Palmer

Electric lamp and discharge devices

Cathode ray tube

Screen

313472, 313473, 313474, H01J 2926

Patent

active

045409137

ABSTRACT:
A cathode-ray tube for color display comprises a face plate (1), a picture element layer (10) formed on an inner surface of the face plate and including two or more kinds of picture elements (5, 6 and 7), and a fluorescent material layer (4) formed between the picture element layer and the inner surface of the face plate and having a 10 percent afterglow time less than 50 microseconds. As necessary, a photoabsorptive material layer (2) may be provided in a matrix manner between the fluorescent material layer and the face plate. The picture element layer (10) performs a color display function and the fluorescent material layer (4) performs a communication function by means of a light pen. In case that a communication function by means of a light pen is not required, the step of forming the fluorescent material layer (4) may be omitted. Therefore, in manufacturing a cathode-ray tube requiring a communication function by means of a light pen and a cathode-ray tube not requiring such function, the same production line can be effectively utilized.

REFERENCES:
patent: 2440301 (1948-04-01), Sharpe
patent: 3891890 (1975-06-01), Yasuda et al.
patent: 3892995 (1975-07-01), Yamazaki
patent: 4424467 (1984-01-01), Masuda et al.
Japanese Gazette No. 86268/1975, Laid Open on Jul. 11, 1975, Entitled, "Cathode-Ray Tube for Display Terminal Unit".

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