Cathode-ray tube having a mixture of long and short persistence

Details Cathode-ray tube having a mixture of long and short persistence Cathode-ray tube having a mixture of long and short persistence

1982-10-06

1984-01-03

Demeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Screen

313473, H01J 2910

Patent

active

044244673

ABSTRACT:
A cathode-ray tube has a phosphor screen which is made by using a mixture of a long persistent phosphor and a short persistent phosphor. A light emission from the short persistent phosphor has a spike figure, so that a light pen can have sufficient sensitivity therefor, and a light emission from the long persistent phosphor is continuous within the one cycle period of the frame frequency, so that flicker is not noticeable.

REFERENCES:
patent: 3742291 (1973-06-01), Yamada
patent: 3911310 (1975-10-01), Galves et al.
patent: 3919584 (1975-11-01), Galves et al.

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