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US 4,730,203 AGranted
Write head for an optical printer
AssigneeFutaba Denshi Kogyo K.K.
InventorsHiroshi Watanabe, Yukihiko Shimizu
Life of this patent
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Abstract
A write head for an optical printer using a vacuum fluorescent tube. The write head includes strip like anodes 12 having a phosphor layer 16, control electrodes 14 having slits 15 formed obliquely across the anodes and a first plate-like control electrode 19 having slits 20 formed at positions corresponding to the slits 15 of the second control electrodes 14.
Claims8
A write head for an optical printer in the form of a vacuum fluorescent tube comprising:
- a substrate;
- a plurality of strip-like anode conductors arranged in parallel on the substrate;
- phosphor layers deposited on the anode conductors;
- control electrodes arranged above the anode conductors;
- and cathodes stretched above the control electrodes;
- the control electrodes comprising a plurality of second control electrodes formed with slits which cross the anode conductors obliquely, and a first control electrode arranged above the second control electrode, at positions the first control electrode being formed with slits at positions corresponding to the slits of the second control electrodes.
3 more elements
Dependencies are inferred from the claim text.