Vacuum fluorescence display
AssigneeDisplay Research Laboratories, Inc.
InventorsKazuhiko Kasano, Duane A. Haven, W. Edward Naugler, Jr.
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Abstract
An improved vacuum fluorescence display (VFD) that is less expensive to produce and more rugged than currently available VFDs. The display includes metal side walls and fluorescent material carried on one or more silicon wafers. A ceramic, layerable insulating material is employed as the substrate on which the wafer or wafers are mounted. In another embodiment of the current invention, a chemical getter is incorporated into a recess formed in the ceramic substrate. The getter is positioned underneath the back side of the phosphor screen so as to significantly reduce contamination of the screen by material sputtered off of the surface of the getter.
Claims9
An improved vacuum fluorescence display comprising:
- a ceramic substrate;
- a metal collar, said metal collar sealed to one surface of said ceramic substrate;
- a viewing window, said viewing window spaced from and disposed approximately parallel to said ceramic substrate and sealed to said metal collar;
- a phosphor screen mounted on said ceramic substrate, said phosphor screen comprising phosphor pixels disposed in a grid pattern on one or more semiconductor chips, said semiconductor chips containing integrated circuits that form a matrix of anodes, said anodes be individually energizable in a desired pattern;
- a getter, said getter formed of a chemically reactive material, said getter mounted inside of said sealed, evacuated interior volume beneath said phosphor screen;
- one or more filament cathodes disposed between said phosphor screen and said viewing window;
- and
- a biasing grid disposed between said phosphor screen and said one or more filament cathodes.
Dependencies are inferred from the claim text.