Field emission display devices
AssigneeSt. Clair Intellectual Property Consultants, Inc.
InventorJohn L. Janning
Life of this patent
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Abstract
A cathodoluminescent field emission display device features an enhancement layer disposed over at least selected portions of an outer surface of an extraction grid of the device. The enhancement layer provides enhanced secondary electron emissions. The enhancement layer is preferably near mono-molecular film of an oxide of barium, beryllium, calcium, magnesium, strontium or aluminum.
Claims8
In a field emission display device including at least one cathode point-type emitter structure, each cathode emitter underlying an aperture in a conductive extraction grid, the improvement comprising:
- an enhancement layer disposed over an outer surface of the extraction grid for providing enhanced secondary emissions of electrons within the device.
In a field emission display device including at least one cathode point-type emitter structure, the improvement comprising:
- a plurality of extraction grids each having an aperture aligned over each point-type emitter structure;
- and
- an enhancement layer disposed over an outer surface of each extraction grid for providing enhanced secondary emissions of electrons within the device.
Dependencies are inferred from the claim text.