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US 4,734,723 AGranted
Electrophotograhic printer
AssigneeNEC Home Electronics Ltd.
InventorYoshimitsu Ishitobi
Life of this patent
Estimating the term…
Abstract
An electrophotographic printer which is equipped with a photoreceptor, a charge device, an optical head, a developing device and a transfer device. The optical head has an array of electroluminescent devices arranged along one edge of a substrate and an array of light waveguide strips for transmitting the light from each of the electroluminescent devices to the other edge of the substrate which is to be brought into a face-to-face relationship with the photoreceptor.
Claims8
An electrophotographic printer comprising:
- a photoreceptor;
- a charging device positioned adjacent said photoreceptor for charging the same;
- a developing device positioned adjacent said photoreceptor for forming a toner density pattern on a charged area thereof;
- a transfer device positioned adjacent said photoreceptor for transferring a toner image therefrom onto a sheet of paper;
- an optical head, positioned adjacent said photoreceptor and including a substrate;
- a light-emitting means for emitting light arranged along one edge portion of the substrate, said light-emitting means comprising an array of electro-luminescent devices, said electro-luminescent devices comprising a first metal electrode layer formed on said substrate, an electro-luminescent material layer formed on said first electrode layer, an electrical insulating layer formed on said electro-luminescent material layer, and a second metal electrode layer formed on said electrical insulating layer;
- and
- a light transmitting means for transmitting light emitted from said emitting means to said photoreceptor;
- said transmitting means comprising an array of light wave guide strips.
6 more elements
Dependencies are inferred from the claim text.