Field emission based print head
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United States of America Patent
Stats
-
Mar 16, 1999
Grant Date -
N/A
app pub date -
Jul 15, 1996
filing date -
Jul 15, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A photoprinter is described, including a print head comprising parallel substrates. The bottom substrate supports an array of microtips that rest on cathode columns. Gate lines, orthogonally disposed relative to the cathode columns are located at the top level of the microtips and have openings through which the microtips can emit electrons, due to field emission, which bombard a nearby conductive phosphor layer, thereby emitting light. A bundle of transparent fibers, cast in a suitable medium, are permanently and transparently attached to the upper surface of the top substrate and are in one to one alignment with the microtips. The far side of the fiber bundle may be ground and polished to fit the contours of a rotatable photosensitive drum. A method for manufacturing the print head is also provided.
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