Photosensor
AssigneeHitachi, Ltd.
InventorsMakoto Matsui, Hideaki Yamamoto, Eiichi Maruyama
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Abstract
In a thin-film photosensor comprising a transparent electrode deposited on one surface of a thin layer of photoconductor, and a counter electrode deposited on the other surface thereof, a photosensor for use in a photosensor array of a facsimile transmitter or the like characterized in that part of the transparent electrode other than a window for incidence of a light signal is covered with an opaque thin film.
Claims14
In a thin-film photosensor comprising an electrode of a transparent conductive film and an opaque metallic thin film of high conductivity both of which are deposited on one surface of a thin layer of photoconductor between the photoconductor and the source of incident light, and a counter electrode deposited on the other surface thereof, the improvement comprising said transparent conductive film other than a window for incidence of a light signal being covered with the opaque thin metallic film to limit the light applied to the photoconductor to attain high resolution and to allow low resistance coupling to lead wires.
In a thin-film photosensor comprising an electrode of a transparent conductive film and an opaque metallic film of high conductivity both of which are deposited on one surface of a thin layer of photoconductor between the photoconductor and the source of incident light, and a counter electrode deposited on the other surface thereof, wherein the improvement comprises that said transparent conductive film is provided on a transparent substrate, that the opaque metallic film is provided on said transparent conductive film except its position corresponding to a window for incidence of a light signal to limit the light applied to the photoconductor to attain high resolution, and to allow low resistance coupling to lead wires, that said thin layer of photoconductor is provided over said electrode and said window for incidence of a light signal in said transparent conductive film, and that said counter electrode is deposited on at least a part of said thin layer of photoconductor.
A photosensor array comprising:
- a transparent substrate:
- a plurality of stripe-shaped electrodes provided on said transparent substrate, each comprising a transparent conductive film and an opaque metallic thin film provided in contact with said transparent conductive film except at a position corresponding to a window for incidence of a light signal;
- a thin layer of photoconductor contiguous with and overlapping at least the opaque metallic thin film of said electrodes and said windows;
- and
- a counter electrode provided on the side of said photoconductor opposite to said transparent electrodes.
A photosensor array comprising:
- a transparent substrate;
- a stripe-shaped electrode provided on said transparent substrate comprising a transparent conductive film and an opaque metallic thin film provided in contact with said transparent conductive film except at a position corresponding to a window for incidence of a light signal;
- a thin layer of photoconductor contiguous with and overlapping at least the opaque metallic thin film of said electrode and said window;
- and
- a plurality of stripe-shaped counter electrodes provided on the side of said photoconductor opposite to said transparent electrodes.
A photosensor array comprising:
- a transparent substrate;
- a plurality of stripe-shaped electrodes provided on said transparent substrate, each comprising a transparent conductive film and an opaque metallic thin film provided in contact with said transparent conductive film except at a position corresponding to a window for incidence of a light signal;
- a thin layer of photoconductor contiguous with and overlapping both at least portions of each of the conductive films and opaque metallic thin films of said electrodes and said windows;
- and
- a counter electrode provided on the side of said photoconductor opposite to said transparent electrodes.
A photosensor array comprising:
- a transparent substrate;
- a stripe-shaped electrode provided on said transparent substrate comprising a transparent conductive film and an opaque metallic thin film provided in contact with said transparent conductive film except at a position corresponding to a window for incidence of a light signal;
- a thin layer of photoconductor contiguous with and overlapping both at least a portion of each of the conductive film and opaque metallic film of said electrode and said window;
- and
- a plurality of stripe-shaped counter electrodes provided on the side of said photoconductor opposite to said transparent electrodes.
Dependencies are inferred from the claim text.