Beam-indexing color picture tube

Details Beam-indexing color picture tube Beam-indexing color picture tube

1981-10-01

1983-09-27

La Roche, Eugene

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Combined cathode ray tube and circuit element structure

313471, H01J 2989, H01J 2996

Patent

active

044069740

ABSTRACT:
A beam-indexing color picture tube includes a gun for producing an electron beam that scans across a screen of the tube and a plurality of index phosphor stripes provided on the screen for emitting near-ultraviolet index lights. The near-ultraviolet index lights are transmitted through a window formed in the tube to a detector. The detector is formed by a planar fluorescent collector doped with fluorescent material for absorbing the near-ultraviolet index lights, and at the same time, generating secondary index lights having different wavelength than that of the near-ultraviolet index lights. A silicon p-i-n photodiode is mounted on the planar fluorescent collector for detecting the secondary index lights and for generating electrical signal representing the near-ultraviolet index lights.

REFERENCES:
patent: 3444413 (1969-05-01), Harrold
patent: 4194140 (1980-03-01), Hamano et al.
patent: 4259687 (1981-03-01), Shinkai et al.

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