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US 5,402,157 AGranted
Electrophotographic recording apparatus
AssigneeKabushiki Kaisha Toshiba
InventorsHitoshi Nagato, Yuzo Koike, Shuzo Hirahara, Masafumi Mori
Life of this patent
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Abstract
A voltage is selectively applied between two electrodes (emitter and gate) disposed at a short distance to create an intense electric field between the electrodes. Electrons emitted by the field emission are accelerated by the intense electric field and collide against a fluorescent layer so that light can be emitted from portions of the fluorescent layer. With a recording head of the above construction, an electrostatic latent image is formed on a photosensitive drum.
Claims20
An electrophotographic recording apparatus comprising:
- a printing head having a substrate, a plurality of recording elements, a certain number of which are driven on the basis of one image signal, formed on said substrate, each of which includes at least one first electrode for emitting electrons according to a predetermined voltage condition and at least one second electrode disposed to face said first electrode and selectively applied with a voltage which is positive with respect to said first electrode, for causing a selected first electrode to emit electrons, and a light emitting section including an acceleration electrode for accelerating electrons emitted from said first electrode and a fluorescent layer for emitting light from a portion against which the electrons accelerated by said acceleration electrode collide;
- and
- a photoconductive medium which is uniformly charged and on which an electrostatic image is formed by application of light emitted from said fluorescent layer.
Dependencies are inferred from the claim text.