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Image input/output apparatus with light illumination device for two-dimensional illumination

  • US 6,295,390 B1
  • Filed: 08/08/1995
  • Issued: 09/25/2001
  • Est. Priority Date: 08/23/1994
  • Status: Expired due to Term
First Claim
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1. An image input/output apparatus comprising:

  • a two-dimensional image input unit disposed on a first surface;

    an image processing circuit for processing an image input by said image input unit;

    a two-dimensional image output unit disposed on a second surface opposite to the first surface; and

    an illumination device disposed between said image input unit and said image output unit for producing an illumination light for use in reading an image by said image input unit and for use in an image display by said image output unit, wherein said illumination device has a light diffusion region, wherein said image input unit comprises photoelectric conversion elements arranged in a matrix, and switch means arranged adjacent to said photoelectric conversion elements for driving said photoelectric conversion elements, each of said photoelectric conversion elements comprises a first electrode layer, a first insulating layer for preventing passage of a carrier of a first conductivity type and a carrier of a second conductivity type different from the first conductivity type, a photoelectric conversion semiconductor layer, a second electrode layer, and an injection prevention layer which is formed between said second electrode layer and said photoelectric conversion semiconductor layer, disposed in opposition to said first electrode layer, to prevent injection of the carrier of the first conductivity type to said photoelectric conversion semiconductor layer, wherein, when a voltage is supplied between said first and second electrode layers, said photoelectric conversion element performs a photoelectric conversion function between said first and second electrode layers, and a function of storing a carrier generated based on the photoelectric conversion function, and said switch means comprises a gate electrode, a gate insulating film on said gate electrode, a semiconductor layer on said insulating film, an ohmic contact layer with a gap on said semiconductor layer, and an electrode on said ohmic layer.

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