Field-emission display with black insulating layer between trans

Details Field-emission display with black insulating layer between trans Field-emission display with black insulating layer between trans

1994-07-20

1996-07-09

O'Shea, Sandra L.

Electric lamp and discharge devices

With luminescent solid or liquid material

Vacuum-type tube

313309, 313336, 3151693, H01J 162

Patent

active

055347495

ABSTRACT:
A field-emission display has a phosphor panel assembly comprising a transparent electrode, a plurality of coated phosphor layers disposed on the transparent electrode for emitting light in response to bombardment of electron beams emitted from field-emission cathodes, a plurality of black insulating layers disposed between the coated phosphor layers, and a plurality of conductive layers disposed on the black insulating layers, respectively, between the coated phosphor layers and electrically insulated from the transparent electrode by the black insulating layer. The black insulating layers provide a black mask between the phosphor layers to improve the contrast ratio, and the conductive layers are effective to increase the percentage of electron beam utilization, thus improving the quality and resolution of displayed images. These advantages can be achieved without making image display unstable due to charging-up of the black mask and straying of secondary electrons.

REFERENCES:
patent: 4472658 (1984-09-01), Morimoto et al.
patent: 4908539 (1990-03-01), Meyer
patent: 5347292 (1994-09-01), Ge et al.
"Phosphors for Full-Color Microtips Fluorescent Displays", by F. Levy et al., IEEE 1991, pp. 20-23. Conference Record of the 1991 International Display Research Conference, 15 Oct., 1991, San Diego, Calif.

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