US 4,757,231 AGranted

Beam-index type color cathode ray tube device

AssigneeSony Corporation

InventorsHiroshi Kato, Reiko Saito

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Abstract

A beam-index type color cathode ray tube device which includes a front panel portion, a screen panel portion which faces the front panel portion, a phosphor screen including a plurality of index phosphor stripes fixed to the inner surface of the screen panel portion and extending at regularly spaced intervals. A porous inorganic layer is fixed on the inner surface of the screen panel portion and extends between each adjoining pair of the index phosphor stripes. A metallic reflecting layer covers the index phosphor stripes and the porous inorganic layer. A plurality of color phosphor stripes is applied to the metallic reflecting layer in a predetermined pattern. A photodetecting portion disposed at the outside of the screen panel portion receives fluorescence from the actuation of the index phosphor stripes.

Claims12

Dependent claims

A beam-index type color cathode ray tube device comprising:

a front panel portion permitting colored light to pass therethrough,
a screen panel portion facing said front panel portion,
a phosphor screen comprising, a plurality of index phosphor stripes fixed on an inner surface of said screen panel portion and extending at regularly spaced intervals, a porous gas permeable inorganic layer fixed on the inner surface of said screen panel portion and extending between each adjoining pair of said index phosphor stripes, a metallic reflecting layer covering said index phosphor stripes and said porous inorganic layers, a plurality of color phosphor stripes fixed on said metallic reflecting layer in a predetermined arrangement, and
a photodetecting portion disposed at the outside of said screen panel portion for receiving fluorescence emitted from each of said index phosphor stripes.

1 more element

Dependencies are inferred from the claim text.