Imaging tube having improved fluorescent surface structure on fi

Details Imaging tube having improved fluorescent surface structure on fi Imaging tube having improved fluorescent surface structure on fi

1993-03-18

1996-02-20

Yusko, Donald J.

Electric lamp and discharge devices

Cathode ray tube

Image pickup tube

313372, 313475, 313524, 313525, 313528, 313544, H01J 2928, H01J 3150

Patent

active

054931746

ABSTRACT:
An imaging tube having a fiber optic plate (FOP) as an output faceplate. On one surface of the FOP within an evacuated envelope is deposited a first transparent conductive layer. On the first transparent conductive layer is deposited a fluorescent layer. On the fluorescent layer is deposited a metal-back electrode. On the other surface of the FOP outside the evacuated envelope is deposited a second transparent conductive layer. The first transparent conductive layer and the metal-back electrode are electrically connected so that an electrical field is not developed across the fluorescent layer when the metal-back electrode is applied with a high positive voltage and the second transparent conductive layer is grounded. Therefore, even if leakage currents flow through the FOP, electric charges impinging upon the first transparent conductive layer will not cause the fluorescent layer to generate noise spots.

REFERENCES:
patent: 3567947 (1971-03-01), Robbins
patent: 3760216 (1973-09-01), Lasser et al.
patent: 3772562 (1973-11-01), Goodrich
patent: 3835314 (1974-09-01), Grossel et al.
patent: 4961026 (1990-10-01), Funk et al.
patent: 5023511 (1991-06-01), Phillips
"Transparent, Electrically Conductive Film," Top Of Mind, No. 57, Ichinose et al., pp. 25-28 (Apr. 1991).
"High Quality Phosphor Screen by Electro Phoretic Deposition Method"; Electronic Communications Society Technical Research Report; vol. 76, No. 223, K. Terashima et al.; Feb. 17, 1977.

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