Loading patent…
AssigneeDai Nippon Printing Co., Ltd.
InventorsMasayuki Iijima, Kyoji Dantani, Hiroyuki Obata, Makoto Matsuo, Minoru Utsumi, Seiji Take
Estimating the term…
The electrostatic information recording medium according to the present invention comprises an electrode layer and an electric charge retaining layer. By improving the laminating method of electric charge retaining layer or by improving the layer arrangement or by converting electrostatic information to the visible information or position information, high information retaining property can be obtained and the accumulated electrostatic information can be maintained for long period. In the electrostatic information recording method according to the present invention, an electrostatic information recording medium is placed face-to-face to a photosensitive member having photoconductive layer on an electrode. The image exposure is performed by applying voltage between two electrodes, and the electrostatic information corresponding to the image exposure is recorded on the electrostatic information recording medium. The electrostatic information recorded in the electric charge retaining layer is easily reproduced by reading surface potential and by amplifying and outputting, or by electro-optical reading method, and further, by toner development. The electrostatic information recording medium according to the present invention has excellent memory capacity with information density of 8.times.10.sup.8 bits/cm.sup.2. For example, it is possible to record the information by electrostatic information recording method using a photosensitive member, to record analog, digital, image, sound and (0.1) information, and to apply for electrostatic recording card and the like.
An electrostatic information recording and reproducing method, characterized in that a photosensitive member having photoconductive layer with electrode on its front is placed face-to-face to an electrostatic information recording medium made of liquid crystal polymer layer and furnished with an electrode on backside, that exposure is performed without heating or by heating the electrostatic information recording medium up to the liquid crystal phase range with voltage applied between two electrodes, that the electrostatic information recording medium is separated and cooled in the case of heating after the exposure pattern is recorded along the orientation of liquid crystal polymer or the electrostatic information recording medium is heated and cooled down after it is separated following the image exposure to record the information, and that the exposure pattern thus recorded is reproduced through a polarization means.
An electrostatic information recording medium, characterized in that an electrode is provided on a substrate, a thermoplastic resin layer, electrophoretic substance layer or electrochromy layer and insulating are sequentially laminated on said electrode, or that electrophoretic substance layer or electrochromy layer and thermoplastic resin layer are sequentially laminated on said electrode, and that said substrate, electrode, thermoplastic resin layer and insulating layer are transparent or semi-transparent.
An electrostatic information recording and reproducing method, characterized in that it comprises a photosensitive member having a photoconductive layer with an electrode on its front, that there is provided an electrostatic information recording medium having a substrate on its backside, that an electrode is laminated on said substrate, that thermoplastic resin layer, electrophoretic substance layer or electrochromy layer and insulating layer are sequentially laminated on said electrode, or that electrophoretic substance layer or electrochromy layer and thermoplastic resin layer are sequentially laminated, that said substrate, electrode, thermoplastic resin layer and insulating layer are transparent or semi-transparent, that photoconductive layer surface of said photosensitive member is placed face-to-face to the insulating layer surface of said electrostatic information recording medium on contact or non-contact basis, and that pattern exposure is performed by applying voltage between two electrodes and the electrostatic information recording medium is developed after the exposure by heat development.
An electrostatic information recording and reproducing method, characterized in that there is provided an electrostatic information recording medium, in which an insulating layer having electric charge transport property is laminated on electrode layer via a destructible electric charge injection preventive layer, that information is recorded by destroying the electric charge injection preventive layer by heating means and by turning the destroyed electric charge injection preventive layer to electrically conductive, and that the information is reproduced by performing total exposure on upper surface of insulating layer of the electrostatic information recording medium.
An information recording and reproducing method, characterized in that there is provided an electrostatic information recording medium, which is furnished with an insulating layer having optical electric charge generating property and electric charge transport property, laminated on electrode layer via a destructible electric charge injection preventive layer, that a photosensitive member having photoconductive layer laminated on an electrode is provided, that the insulating layer of the electrostatic information recording medium and the photoconductive layer of photosensitive member are placed face-to-face to each other, that pattern exposure is performed with voltage applied between two electrodes, that electrostatic pattern is formed on the insulating layer and total exposure is performed on the insulating layer and information is recorded by destroying the electric charge injection preventive layer in the electrostatic pattern forming portion and turning it to electrically conductive, and that said electrostatic information is reproduced by total charging on the upper surface of the electrostatic information recording medium.
An electrostatic information recording and reproducing method, characterized in that there is provided an electro-optical element, which changes the optical property according to the effect of electric field, that an electrostatic information recording medium is provided, which comprises an electrode and an insulating layer on a support member and on which electric charge is accumulated, that said electro-optical element is placed face-to-face to said electrostatic information recording medium, that the electrodes of electro-optical element and electrostatic information recording medium are short-circuited with each other and light is irradiated to the electro-optical element, and that electric charge pattern is read by transmission light or reflected light.
An electrostatic information recording and reproducing medium, characterized in that the electro-optical element is a liquid crystal element having memory property, that electric charge pattern information is memorized in the liquid crystal element by short-circuiting the electrodes of electro-optical element and of electrostatic information recording medium, and that light is irradiated to the liquid crystal element through a polarizing plate and the information is read by transmission light or reflected light through a polarizing plate.
Dependencies are inferred from the claim text.