JP2003005209A - Overwriting device for electronic recording media, overwriting method therefor, electronic recording medium folder, and electronic recording media - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the troublesomeness of recording the same picture information or different picture information in a plurality of electronic recording media, and also loading the electronic recording media on a writing device one by one. SOLUTION: This is an overwriting device for electronic recording media for recording a visual picture in each of the electronic recording media 14. The device comprises a light emitting part 30 for emitting exposure light toward the arranged electronic recording media 14, a voltage application part 20 for applying picture writing voltage to each of the arranged electronic recording media 14, and a control part 40 for controlling the light emitting part 30 and the voltage application part 20 so that the exposure light for showing the visual picture to the arranged electronic recording media, and also the picture writing voltage is applied to the electronic recording media 14 for recording the same visual picture as the picture therein.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic recording medium overwriting device for copying information from a recording device such as a display device or paper used for OA equipment, information communication terminal equipment, POS terminal, etc., and its device. The present invention relates to an electronic recording medium writing method, an electronic recording medium holder, and an electronic recording medium on which information is written.

[0002]

2. Description of the Related Art Conventionally, a display panel formed by using a plastic film substrate such as a polymer film is thinner than a display panel formed by using a glass substrate,
Since it is lightweight and can be bent, its advantages are fully exhibited as a display device of a handy type electronic device.

In particular, a liquid crystal display device using a composite of a self-holding type liquid crystal in which a cholesteric liquid crystal is dispersed in a transparent resin material and a resin has a stable memory property,
It is attracting attention because high-definition display is possible by simple matrix drive without requiring an active drive circuit such as a TFT liquid crystal.

In particular, the light-scattering mode of the cholesteric liquid crystal which can obtain a high reflection contrast is utilized in the light-receiving type display to achieve both high speed display and high resolution.
Since there is no flicker, the display is easy to see, and the eyes do not get tired easily, so it meets the needs of being easy on the human eye, and because it has a memory function for display contents, it can display and save information even without a power supply. Because there is
It also meets the needs of energy saving and environmental friendliness.

Further, a composite of self-supporting liquid crystal and resin and a photoconductor are combined to form an electronic recording medium,
A system that applies a voltage to the electronic recording medium and irradiates exposure light to display a visible image is effective as a printer that uses the electronic recording medium instead of paper, and displays information displayed on an electronic display device. It is also useful as a tool to transform the conventional method of making a hard copy and then viewing it, and by utilizing the characteristic that it can be used repeatedly, resource and waste can be realized.

Assuming that the electronic recording medium using this liquid crystal is taken by hand like paper, or moved by holding it in the hand, a voltage is applied to the electronic recording medium or exposure light is irradiated. Therefore, it is considered to be more convenient to use the writing device for writing information and the electronic recording medium in a separable manner.

However, when the electronic recording medium and the writing device are separated from each other, the electronic recording medium holds only the information that is actually recorded, like the paper medium, and the characteristic that repeated rewriting is possible is sufficient. Is not alive.

On the other hand, a writing device of the type that irradiates exposure light while applying a voltage is made of an image display body such as a light-emitting electronic display for displaying image information, or a light-transmitting material. Since it requires both a light emitting unit that irradiates the displayed image with exposure light from the back and a voltage applying unit that applies a voltage to the electronic recording medium, it is not easy to configure as a portable type.

Japanese Unexamined Patent Publication No. 11-237644 discloses a method of successively exposing while moving a laser beam or a light emitting diode array in order to miniaturize an electronic recording medium overwriting device for an electronic recording medium. .

According to this method, since it is not necessary to expose the entire surface of the electronic recording medium at the same time, the size of the entire electronic recording medium overwriting device can be reduced by downsizing the light irradiation section.

However, this disclosed method has a problem that the speed of writing the image information on the electronic recording medium is reduced, so that the need for displaying the image information at a high speed cannot be satisfied.

Further, when rewriting the image information of the electronic recording medium separated from the electronic recording medium overwriting device, the electronic recording medium is brought to a place where the electronic recording medium overwriting device is installed. Then, the brought electronic recording medium is attached to the electronic recording medium overwriting device one by one, and exposure is performed while applying a voltage to the electronic recording medium. Further, even when the same image information or different image information is recorded on a plurality of electronic recording media and distributed to a plurality of persons or places, the electronic recording media are mounted on the electronic recording medium overwriting device one by one. On the other hand, there is the trouble of applying a voltage and exposing the electronic display sheet. The trouble of installing the electronic recording medium in the electronic recording medium overwriting device does not disappear even if the electronic recording medium overwriting device is downsized and the electronic recording medium overwriting device becomes portable. Probably a problem. Further, when a plurality of electronic recording media are arranged in an overlapping manner and an image is written by exposing the plurality of electronic recording media from the same exposure means, a function of blocking the outside scene and a function of transmitting the exposure light are provided. It is necessary to make both compatible and record images of similar contrast on each of the superposed electronic recording media.

[0013]

In view of the above circumstances, the present invention makes it possible to record the same image information or different image information on a plurality of electronic recording media, and at the same time, electronic recording media can be recorded electronically one by one. An electronic recording medium overwriting device and an electronic recording medium overwriting device which eliminate the troublesomeness of attaching to the recording medium overwriting device and improve the convenience when recording or rewriting image information on a plurality of electronic recording media An object of the present invention is to provide an embedding method, an electronic recording medium holder, and an electronic recording medium.

[0014]

In the electronic recording medium overwriting apparatus of the present invention which achieves the above object, a visible image is formed by being stimulated by both irradiation of exposure light representing an image and application of a voltage. An electronic recording medium overwriting device for recording a visible image on each of the electronic recording mediums, wherein a plurality of electronic recording media to be recorded are superposed and arranged. A light irradiation unit that irradiates the electronic recording medium with exposure light, a voltage application unit that applies an image writing voltage to each of the plurality of arranged electronic recording media, and a plurality of arranged electronic recording media The light irradiation unit and the voltage application unit are controlled so that the exposure light representing the image is irradiated onto the electronic recording medium and the image writing voltage is applied to the electronic recording medium on which the same visible image as the image is recorded. With the control unit And it said that there were pictures.

Here, the control section irradiates the plurality of arranged electronic recording media with exposure light and simultaneously applies an image writing voltage to the arranged plurality of electronic recording media. Therefore, it is preferable that the light irradiation section and the voltage application section are controlled so that the same visible image is recorded on each of the electronic recording media.

Further, the control unit irradiates a plurality of arranged electronic recording media with exposure light representing an image and applies an image writing voltage to the electronic recording medium on which the same visible image as the image is recorded. The visible image is recorded on each of the electronic recording media by repeating the applied image writing process while changing the exposure light representing different images and applying the image writing voltage to different electronic recording media. To be,
It is preferable to control the light irradiation unit and the voltage application unit.

Further, the control section performs reset so that a uniform initial image is recorded on the electronic recording medium before recording the visible image on the electronic recording medium, and the light emitting section and the control section. It is also a preferable embodiment to control the voltage applying section.

According to the electronic recording medium overwriting method of the present invention which achieves the above-mentioned object, a plurality of electronic images in which a visible image is recorded by being stimulated by both irradiation of exposure light representing an image and application of a voltage are provided. A recording medium is arranged so as to overlap a predetermined image writing unit, and exposure light is irradiated toward the plurality of electronic recording media arranged in the image writing unit, and each of the plurality of electronic recording media is irradiated. It is characterized in that an image writing voltage is applied.

Here, a plurality of electronic recording media having different required light amounts of exposure light for recording the same image are prepared, and the plurality of electronic recording media are arranged in the image writing section in an overlapping manner. In this case, it is also a preferable aspect to arrange these plural electronic recording media so that the electronic recording media having the smaller necessary light amount are arranged closer to the side irradiated with the exposure light.

In the electronic recording medium holder of the present invention which achieves the above object, one end portion of the electronic recording medium is inserted and removed, and a plurality of medium connecting portions are inserted in a state of being superposed on each other.
A connector for independently applying an image writing voltage to each of the electronic recording media inserted in the medium connecting portion is provided.

The electronic recording medium of the present invention which achieves the above object, comprises an image recording layer on which a visible image is recorded by being stimulated by irradiation of exposure light representing an image, and at least the exposure light on the image recording layer. And a functional layer that transmits the exposure light at the time of irradiation and shields the outside scene at the time of observing the visible image recorded in the image recording layer.

Here, it is also a preferable embodiment that the functional layer has a light-shielding property of transmitting the exposure light having a wavelength in a predetermined band and blocking the outside scene.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of an electronic recording medium overwriting apparatus of the present invention will be described below.

FIG. 1 is a schematic block diagram showing an electronic recording medium overwriting apparatus according to a first embodiment of the present invention.

This embodiment is the first embodiment of the electronic recording medium overwriting apparatus of the present invention, the embodiment of the electronic recording medium overwriting method of the present invention, and the embodiment of the electronic recording medium holder of the present invention. Equivalent to.

The electronic recording medium overwriting apparatus shown in FIG.
The voltage application unit 20, the light irradiation unit 30, the control unit 40, and the electronic recording medium holder 10 that connects the plurality of electronic recording media 14 and the voltage application unit 20 to each other, and an instruction to the electronic recording medium overwriting device. Is performed through the control unit 40 by operating a keyboard or mouse of a personal computer (PC) connected to the electronic recording medium overwriting device.

The electronic recording medium holder 10 has a connector 2 attached to one end of each electronic recording medium 14 and having an external connection electrode 13 connected to a pair of electrodes of the electronic recording medium 14, and a connector 12 is inserted therein. And an external connection electrode 13 of the connector 12 and a medium connecting section 11 connected to the voltage applying section 20 of the electronic recording medium overwriting device, and the electronic recording medium with a plurality of electronic recording mediums 14 inserted therein. The overwriting device can be freely attached and detached, and the device itself can be carried separately from the electronic recording medium overwriting device.

The control unit 20 irradiates each of the plurality of electronic recording media 14 connected to the medium connection unit 11 with appropriate exposure light based on the content instructed by the operation of the PC, and also performs appropriate exposure. The light irradiation unit 30 and the voltage application unit 20 are controlled so that the image writing voltage is applied.

The voltage application section 20 includes a drive signal communication section 21 for transmitting a command signal issued by the control section 40 and a medium connection section 11 based on the signal transmitted from the drive signal communication section 21.
And a drive signal switching unit 22 for switching drive signals for batch voltage application or individual voltage application to each electronic recording medium 14 connected to the voltage application unit 20 and a predetermined pulse voltage based on the drive signal. The drive pulse generation unit 23 generates and applies the predetermined pulse to the electronic recording medium 14.

The light irradiation section 30 irradiates the electronic recording medium 14 with exposure light based on the signal transmitted from the optical write signal communication section 31 and the optical write signal communication section 31 which transmits the write signal generated by the control section 40. A timing control circuit 32 for generating a timing signal for generating, an image signal unit 3 for generating an image signal for displaying image information on the pattern generation unit 35, and a light for irradiating exposure light from the back surface of the pattern generation unit 35, if necessary. The irradiation unit 34 and the pattern generation unit 35 that displays an image to be recorded on the electronic recording medium 4 are included.

As described above, the electronic recording medium 14 is attached to the connector 12 at one end thereof, and the connector 12 is inserted into the medium connecting portion 11 of the electronic recording medium overwriting apparatus, whereby the electronic recording medium 14 is electronically stored. It can be connected to the voltage application unit 20 of the recording medium overwriting device. The electronic recording medium holder in which the electronic recording medium 14 is inserted and held in the medium connecting portion 11 can be easily removed as it is from the electronic recording medium overwriting device, which is convenient for carrying and is capable of rewriting and the like. This can be easily performed by simply connecting the electronic recording medium holder to the electronic recording medium overwriting device while holding the electronic recording medium.

As described above, if a plurality of electronic recording media 14 are stacked and attached to the electronic recording medium overwriting device via the electronic recording medium holder 10, the plurality of electronic recording media 14 can be attached once. It is possible to record the same image information at the same time.

Next, an electronic recording medium used in the first embodiment of the electronic recording medium overwriting apparatus of the present invention will be described.

FIG. 2 is a diagram showing a first configuration example of an electronic recording medium used in the electronic recording medium writing apparatus of the first embodiment of the present invention.

In the electronic recording medium shown in FIG. 2, silica, glass or plastic spacers are dispersed between the transparent upper substrate 1a and the transparent lower substrate 1b on the organic photoconductor layer 4 to form a liquid crystal. The layer thickness is controlled to be several μm to several tens μm.

In FIG. 2, the electronic recording medium has a substrate 1a having a transparent upper surface and a substrate 1b having a transparent lower surface, and a transparent electrode film is adhered to each substrate to form an external connection electrode of a connector. A transparent electrode 2a and a transparent electrode 2b, which are connected to each other, are formed.

The electrode film is not particularly limited as long as it is a conductive material, but it is preferable to use a material having both conductive and transparent properties, such as a NESA film or indium oxide or indium oxide and tin oxide. An ITO (indium tin oxide) film made of a mixture thereof and the like are used.

The method for forming the electrode film on the transparent substrates 1a, 1b is not particularly limited, and it may be formed by a method such as vapor deposition or sputtering. The form of the electrode film can be arbitrarily formed according to the display content that needs to be displayed, and it can be formed into a stripe-shaped electrode pattern for dot matrix display or an electrode pattern for segment display by etching. You can Further, the stripe electrode pattern and the segment display electrode pattern can be mixed.

The transparent substrate is made of a material transparent to visible light, such as soda glass or Corning 7
Although 059 and the like are used, the present invention is not limited to these. When a flexible substrate is used as the transparent substrate, the material of the plastic film substrate is a crystalline polymer such as uniaxially or biaxially stretched polyethylene terephthalate, an amorphous polymer such as polystyrene or polyether sulfone, or polyethylene or polypropylene. Polyolefin, polycarbonate, polyamide such as nylon, etc. are used. The thickness of the transparent substrate is
It can be 0.3 mm or less, preferably 20 to 200 μm.

If necessary, a functional film such as a wear resistant layer or a gas barrier layer may be formed on the surface of the transparent substrate.

The cholesteric liquid crystal constituting the liquid crystal layer 3 includes Schiff base type, azo type, azoxy type, biphenyl type, terphenyl type, benzoic acid type, tolan type, pyrimidine type, cyclohexane carboxylic acid type, phenyl cyclohexane. It is possible to use a nematic liquid crystal having a positive dielectric anisotropy such as a system or a dioxane, or a mixture thereof, to which an optically active chiral agent such as an ester derivative, a cyanobiphenyl derivative, or a bisannealing derivative is added. .

The helical pitch of the cholesteric liquid crystal is adjusted by the amount of the chiral agent added to the nematic liquid crystal. For example, when the display color is blue, the central wavelength of selective reflection is 400 to 500 nm, when the display color is green, the central wavelength of selective reflection is 500 to 600 nm, and when the display color is red. Indicates the central wavelength of selective reflection is 600 to 700 nm
To be within the range. For the purpose of compensating for the temperature dependence of the helical pitch of the cholesteric liquid crystal, a plurality of chiral agents having different twist directions or having temperature dependences acting in reverse may be added.

As a mode in which the liquid crystal layer 3 forms a self-supporting liquid crystal-resin composite composed of a cholesteric liquid crystal and a transparent resin, a PNLC (Polymer Network Li) containing a network resin in a continuous phase of the cholesteric liquid crystal.
liquid crystal (P) with cholesteric liquid crystal dispersed in the polymer skeleton
DLC (Polymer Dispersed Liquid)
dCrystal) structure can be used. PNL
The C structure or PDLC structure is a method of phase-separating a polymer and a liquid crystal, for example, a polymer precursor such as an acrylic, thiol, or epoxy polymer that is polymerized by heat, light, or an electron beam is mixed with a liquid crystal to form a uniform phase. (Polymerization Ind) that polymerizes from the state of
ucedPhase Separation) method, a polymer with a low liquid crystal solubility such as polyvinyl alcohol, and a liquid crystal are mixed and stirred to suspend the liquid crystal in the polymer to form a droplet dispersion in the polymer, and a thermoplastic polymer and a liquid crystal are mixed to obtain a uniform mixture. TIPS (Thermally Induced Ph) for cooling the phase from the heated state to phase-separate
as Separation) method, a polymer and a liquid crystal are dissolved in a solvent such as chloroform, and the solvent is evaporated to phase-separate the polymer and the liquid crystal.
It can be formed by a reduced phase separation method or the like, but is not limited thereto.

The photoconductor layer 4 may be of any type of charge transfer complex type, eutectic complex type and laminated type. Specifically, poly-N-vinylcarbazole / 2,4,7-trinitrofluorenone-based compounds, triphenylmethane-based compounds dispersed in a eutectic of pyrylium salt and polycarbonate, organic compounds such as azo compounds and phthalocyanine compounds. It is possible to use, for example, a charge-transporting material formed of a pigment and a charge-transporting material obtained by dissolving and dispersing a low-molecular-weight transport material of a charge carrier in a general-purpose resin such as polyester or polycarbonate to form a layer. The material is not limited to the above-mentioned materials as long as the dielectric constant and the conductivity greatly change by the exposure to the specific light.

FIG. 3 is a diagram showing a second configuration example of the electronic recording medium used in the electronic recording medium writing apparatus of the first embodiment of the present invention.

The electronic recording medium shown in FIG. 3 has a liquid crystal layer 3 in which cholesteric liquid crystal is droplet-dispersed in a supporting porous structure of a polymer, as compared with the first configuration example, and the PDL is used.
The spacers are omitted due to the microcapsules 5 formed around the liquid crystal by forming the C structure. Further, by encapsulating the cholesteric liquid crystal in a microcapsule, the memory property of the image and the mechanical resistance of the electronic recording medium are improved. Further, in the liquid crystal in which such capsules 5 are dispersed, in a state where an electric field is not applied between the two transparent substrates, light is reflected by the liquid crystal in the capsule 5 and the liquid crystal can be visually recognized as milky white, and the electric field is applied. In this state, the liquid crystal and the liquid crystal in the capsule 5 are transparent.

As shown in FIG. 3, the electronic recording medium has a transparent film (PET) substrate 1a on the upper surface and I on the substrate 1a.
The electrode 2a patterned with TO, the liquid crystal layer 5 on which the solution in which the capsule in which the cholesteric liquid crystal is encapsulated by the polymer is dispersed is uniformly applied on the electrode 2a, and the photoconductive layer 4
And a transparent film (PET) substrate 1b on the lower surface and an electrode 2b having ITO patterned on the substrate 1b. On the ITO electrode 2a of the film (PET) substrate (thickness 125 μm) 1a, a solution in which a capsule 5 in which a cholesteric liquid crystal is encapsulated with a polymer is dispersed is uniformly applied by a functional thin film printer or an applicator. The coating film thickness of the cholesteric liquid crystal solution is set so that the film thickness of the cholesteric liquid crystal when the solvent is evaporated is about the same as or larger than the diameter of the capsule used. As a solvent for dissolving the liquid crystal, a general solvent such as an aromatic solvent, an aliphatic solvent or an alcohol solvent can be used.

The application area of the cholesteric liquid crystal is smaller than the area where the pair of transparent substrates are superposed.

Although the cholesteric liquid crystal is applied by a functional thin film printer or applicator in this configuration example, the present invention is not limited to this method. For example, a printing plate such as screen printing, a dispenser or a sprayer is used. It may be a coater that moves the coating area.

After applying the cholesteric liquid crystal, the transparent substrate is heated or left at room temperature to evaporate the solvent. As a heating method, for example, a transparent substrate coated with cholesteric liquid crystal using a hot plate is placed thereon, a method of blowing warm air, a method of irradiating infrared rays or microwaves, or a method of heating the cholesteric liquid crystal coating substrate 1a. Examples include a method in which a heated metal roll such as a heated stainless roll is pressed against the back side of the surface coated with the cholesteric liquid crystal to heat.

In this configuration example, the upper transparent substrate 1a coated with cholesteric liquid crystal is left at room temperature for one day to evaporate the solvent and form the liquid crystal layer 3. Next, a lower surface transparent substrate 1b (PET, thickness 125 μm) with another lower surface transparent electrode 2b is laminated on the cholesteric liquid crystal application surface of the upper surface transparent substrate 1a by a substrate laminator so that the electrode surface is in contact with the cholesteric liquid crystal. As a stacking method, the upper transparent substrate 1a coated with the cholesteric liquid crystal 3 is made to pass together with the lower transparent substrate 1b coated with the photoconductor 4 between two rollers having a built-in heater for heating.

As another lamination method, the upper surface of the transparent substrate 1a coated with the cholesteric liquid crystal 3 is fixed to a flat stage having a built-in heater for heating the transparent electrode 2a.

The other lower transparent substrate 1b is heated by aligning the transparent electrode 2a of the upper transparent substrate 1a fixed to the flat stage and the transparent electrode 2b of the other lower transparent substrate 1b so that their inner surfaces face each other. The transparent electrode 2b is adsorbed and fixed to the attachment head having a built-in heater from the back surface of the transparent electrode 2b.

The substrate laminator was positioned such that the transparent electrode surface 2b of the lower transparent substrate 1b adsorbed and fixed to the sticking head faced the surface coated with the cholesteric liquid crystal, and a heater was also incorporated inside from the end. By moving the sticking roller, the layers are sequentially laminated.

More specifically, a heating heater inside a flat stage for fixing the upper transparent substrate 1a coated with cholesteric liquid crystal, a heating heater inside a sticking head for fixing the lower transparent substrate 1b, and a pair of transparent substrates. The heaters inside the sticking rollers for stacking are set to the same temperature in consideration of the thermal expansion of the transparent substrates.

When stacking a pair of substrates, all the built-in heaters are set to 110 ° C. in order to prevent fine air bubbles from being caught in the liquid crystal layer 3 sandwiched between the pair of transparent substrates 1a and 1b. is doing.

According to this method, in the case of a flexible substrate, for example, since the pair of plastic film substrates are heated to the same temperature, there is no problem that the ends of the plastic film substrates curl and the transparent electrode is broken.

In this configuration example, the method of applying the cholesteric liquid crystal to the transparent substrate has been described. However, a photoconductor or a light shielding film is provided between the transparent electrode of the transparent substrate and the cholesteric liquid crystal on the transparent electrode of the other transparent substrate. Also in the case of forming, the same coating method as this can be performed.

Next, a first embodiment of an electronic recording medium used in the first embodiment of the electronic recording medium overwriting apparatus of the present invention will be described.

FIG. 4 is a diagram showing a first embodiment of an electronic recording medium used in the electronic recording medium overwriting apparatus of the first embodiment of the present invention.

The first embodiment of the electronic recording medium is composed of the liquid crystal layer 3 and the photoconductive layer 4 of the image recording layer 8 on which a visible image is recorded, as compared with the first configuration example described with reference to FIG. The difference is that a functional layer 7 that transmits the exposure light and blocks the outside scene is formed therebetween.

In FIG. 4, electrodes 2a and 2b are formed on transparent substrates 1a and 1b, respectively, and an image recording layer 8 on which a plastic image is recorded is formed between the electrodes. The image recording layer 8 has a photoconductor layer 4 that exhibits an electric characteristic distribution according to the light amount distribution of the exposure light when irradiated with the exposure light, and a partial pressure distributed according to the electric characteristic distribution of the photoconductor layer 4. It is formed at a position sandwiched between the liquid crystal layer 3 and the photoconductor layer 4 and the liquid crystal layer 3 on which a visible image is recorded by an optical characteristic distribution according to the partial pressure applied to the image recording layer 8. It is composed of a functional layer 7 which transmits the exposure light when the exposure light is irradiated and blocks the outside scene when the visible image recorded on the liquid crystal layer 3 is observed.

In the electronic recording medium overwriting apparatus of the first embodiment of the present invention, a visible image is recorded on the electronic recording medium by superposing a plurality of electronic recording media and irradiating the exposure light. Therefore, in the electronic recording medium, a part of the exposure light is transmitted, and at the time of observation, the functional layer 7 that blocks the outside scene.
Need to have. The optical requirements of the functional layer 7 for blocking the outside scene differ depending on which optical change the image recording layer 8 utilizes. For example, when the image recording layer 8 uses the change in the absorption coefficient, white scattering property is required, and when the image recording layer 8 uses the change in reflectance, the light absorption property is required, and the change in the scattering coefficient is used. If it is one,
Since specular reflectivity is required, it is necessary to select it appropriately according to the image recording layer 8. The functional layer 7 can be formed by laminating a light absorbing material and a light reflecting material, if necessary.

For the functional layer 7, for example, black polyimide BKR-105 manufactured by Nippon Kayaku Co.
CK780 made by Dainippon Ink Co., Ltd. formed to a thickness of 7 μm
0L formed with a spin coater to a thickness of 1.2 μm,
Black paint PC-Black-006P (manufactured by Nippon Kayaku) and an aqueous solution of polyvinyl alcohol are dip-coated to 2
A black PET resin film having a thickness of 4 μm and a thickness of 4 μm can be used. By using these, the functional layer 7 with almost no visible light transmission can be formed.

Examples of the material used for the liquid crystal layer 3 having electric response by partial pressure include chiral nematic liquid crystal,
A memory-type liquid crystal such as a smectic A liquid crystal, a chiral smectic C liquid crystal, a bistable twisted nematic liquid crystal, a fine particle dispersion liquid crystal, or a memory-type display device such as a Gyricon device or an electrophoretic device can be used.

Materials for the photoconductor layer 4 include a photoconductive material (1) and a photovoltaic material (2). (1) As the photoconductive material, (a) amorphous silicon, ZnS
e, an inorganic semiconductor material such as CdS or an organic semiconductor material such as anthracene or polyvinylcarbazole (b) A charge generating material that generates a charge by light irradiation, for example, a perylene-based material, a phthalocyanine-based material, a bisazo-based material, a dithiopytochelopyrrole-based material, Squarylium-based, azurenium-based, thiapyrylium-polycarbonate-based compounds and the like, and a charge-transporting material that transports generated charges, for example, trinitrofluorene-based, polyvinylcarbazole-based, oxadiazole-based, pyrarizone-based, hydrazone-based, stilbene-based, tri-based A composite material such as a phenylamine-based compound, a triphenylmethane-based compound, a diamine-based compound, or an ion conductive material such as polyvinyl alcohol or polyethylene oxide added with LiClO ₄ is used. (2) As a photovoltaic material Is pn Semiconductor having a focus (silicon, compound semiconductor, an organic semiconductor) or the like can be utilized. The electrically responsive material and the photoelectric effect material can be used in various composite forms such as a mixture, a laminate, and a microcapsule.

Since the liquid crystal material as the above-mentioned optical material having an electrical response causes an optical change in a low electric field, particularly preferable liquid crystal materials are cyanobiphenyl type, phenylcyclohexyl type, phenylbenzoate type, cyclohexylbenzoate type, azomethine type, Known liquid crystal compositions such as azobenzene, pyrimidine, dioxane, cyclohexylcyclohexane, stilbene, and tolan can be used. Additives such as dyes and fine particles may be added to the liquid crystal material. Further, it may be dispersed in a polymer matrix, polymer gelled, or encapsulated. Further, it may be any of high molecular liquid crystal, medium molecular liquid crystal, low molecular liquid crystal, and a mixture thereof.

By separating the functions as described above, advantages such as increased sensitivity to the amount of exposure light, enabling writing in a low electric field, and expanding the choice of materials can be obtained.

Since the substrates 1a and 1b and the electrodes 2a and 2b are the same as those described with reference to FIG. 2 in the first structural example, redundant description will be omitted here.

FIG. 5 is a graph showing the absorbance of the functional layer of the electronic recording medium of the first embodiment.

In FIG. 5, the vertical axis represents the extinction coefficient, the horizontal axis represents the wavelength, and the curve in the figure represents the wavelength characteristics of the extinction coefficient for various substances used in the functional layer described with reference to FIG. .

As is apparent from the figure, the wavelengths of 600 nm and below are absorbed and hardly transmitted, but the infrared rays of 700 nm and above are transmitted and hardly absorbed. Therefore,
If the wavelength range around 700 nm is used as the exposure light, these substances shield the display wavelength range but transmit the exposure light, and thus can be used as the functional layer 7 of the present embodiment.

Here, if the wavelength range of the exposure light representing an image is within the visible wavelength range, transparency occurs in that wavelength range, so the wavelength range of the exposure light is outside the visible wavelength range, that is, at a wavelength of 400 n.
It is preferably m or less or 700 nm or more. Generally, a wavelength of 400 to 800 nm is said to be in the visible wavelength range, but a wavelength of 700 to 800 nm has a low luminosity factor, so it may be within the above range, and it is more preferable if the wavelength range of exposure light representing an image can be 800 nm or more. preferable. When the wavelength range of the exposure light representing an image is set within the visible wavelength range, it is better to narrow the width of the exposure light wavelength range for the purpose of suppressing the degree of see-through, and 100 nm or less, more preferably 50 nm or less. Is desirable.

The transmittance of the functional layer in the display wavelength range is preferably 10% or less, more preferably 1% or less.

Here, as a method of controlling the transmittance of the functional layer for each wavelength range, there are a method of utilizing the wavelength dependency of the reflectance and a method of utilizing the wavelength dependency of the extinction coefficient. In the former case For example, by using a dielectric multilayer film as a functional layer, a cholesteric liquid crystal having selective reflection, or the like, in the latter case, for example, a coloring material containing a dye or a pigment having an appropriate absorption spectrum or two polarizers. It can be realized by using one having a retardation film sandwiched therebetween.

FIG. 6 is a diagram showing the absorptance of the photoconductor layer of the electronic recording medium of the first embodiment.

In FIG. 6, the vertical axis represents the light absorptance and the horizontal axis represents the wavelength, and the curve in the figure represents the wavelength characteristics of the light absorptivity of various substances used in the photoconductive layer.

As is clear from the figure, the photoconductor layer has 5
There is almost no absorption of light near 00 nm, but 700n
It absorbs light in the wavelength range of m or more, and the resistance value changes.

Therefore, as is clear from FIGS. 5 and 6, when writing image information on an electronic recording medium having a functional layer, a plurality of electronic recording media can be formed by using exposure light having a wavelength of 700 nm or more. It is possible to write a visible image even in the overlapping state.

Here, the functional layer 7 has a function of changing the transmittance by applying an external stimulus, and making the functional layer 7 in the transmissive state by applying the external stimulus only during exposure, and transmitting a part of the exposure light. In addition to the above, it is possible to provide a function of blocking the outside scene during observation.

FIG. 7 is a diagram showing a second embodiment of an electronic recording medium used in the electronic recording medium writing apparatus of the first embodiment of the present invention.

The electronic recording medium of the second embodiment is different from the electronic recording medium of the first embodiment described with reference to FIG. 4 in the liquid crystal layer 3 of the image recording layer 8, but other than that. The points are common. The liquid crystal layer 3 is the same as that of the second configuration example described with reference to FIG. Therefore, the same reference numerals are given to the same constituent elements and the description thereof will be omitted.

In FIG. 7, the photoconductive layer 4 of the image recording layer 8 is shown.
The functional layer 7 is formed between the liquid crystal layer 3 and the liquid crystal layer 3. Also,
The liquid crystal layer 3 is a cholesteric liquid crystal in which droplets of cholesteric liquid crystal are dispersed in a supporting porous structure of a polymer, and a spacer is omitted by a capsule 5 formed around the liquid crystal by forming a PDLC structure.

As shown in FIG. 4 and FIG. 7, when the functional layer 7 is sandwiched between the liquid crystal layer 3 and the photoconductive layer 4, when an image is written from the back side having the photoconductive layer 4. In addition, since the illumination light applied to the photoconductive layer 4 from the surface side having the liquid crystal layer 3 is blocked by the functional layer 7, the performance of writing an image on the electronic recording medium is improved. Further, when observing an image, the electronic recording medium is transparent and the outside scene is not visible, so that a visible image can be clearly seen.

FIG. 8 is a schematic diagram showing the switching behavior of the electronic recording medium connected to the electronic recording medium overwriting apparatus of this embodiment.

In FIG. 8, the vertical axis represents the reflectance of the liquid crystal layer,
The horizontal axis represents the voltage applied between the electrodes of the electronic recording medium. The solid line in the figure represents the behavior of the liquid crystal layer during exposure, and the dotted line represents the behavior of the liquid crystal layer during non-exposure. Further, at the time of exposure, the threshold voltage at which the liquid crystal layer 3 transits from the planar phase to the focal conic phase is Vp.
fe, the threshold voltage at which the liquid crystal layer 3 transitions from the planar phase to the focal conic phase when not exposed is Vpfu,
Let Vfpe be the threshold voltage at which the liquid crystal layer 3 transits from the focal conic phase to the planar phase during exposure, and Vfpu be the threshold voltage at which the liquid crystal layer 3 transits from the focal conic phase to the planar phase during the non-exposure.

As can be seen from the figure, the applied voltage is set to Vpfe
As described above, if the range of Va which is Vpfu or less is set, the electronic recording medium becomes a planar phase at the time of non-exposure and exhibits a blackish state with high reflectance, but transitions to the focal conic phase at the time of exposure, so that the reflectance is low. Presents a transparent state. Further, when the applied voltage is set in the range of Vc which is not less than Vfpe and not more than Vfpu, the electronic recording medium exhibits a focal conic phase at the time of non-exposure and exhibits a transparent state with a low reflectance, but becomes a planar phase at the time of exposure. Since it transits, it exhibits a dark state with high reflectance.

FIG. 9 shows an equivalent circuit of the electronic recording medium of this embodiment.

In FIG. 9, Ca represents the capacitance of the liquid crystal layer 3, Cb represents the capacitance of the photoconductor layer 4, Ra represents the resistance value of the liquid crystal layer 3, and Rb represents the resistance value of the photoconductor layer 4. ing.
When a voltage V is applied from the electronic recording medium overwriting device between the electrodes 2a and 2b of the electronic recording medium, the resistance value Ra of the liquid crystal layer 3 and the resistance value Rb of the photoconductor layer 4 are generally sufficiently large. , The voltage Va applied to the liquid crystal layer is Va = (Cb
/ C) × V. Where C = CaCb / (C
a + Cb). When a charge transfer complex type or eutectic complex type organic photoconductor is used for the photoconductor layer 4, by simply controlling the coating film thickness, and when using a laminated type organic photoconductor, A sufficient threshold voltage difference can be obtained by simply controlling the film thickness of the charge transport layer.

On the other hand, the switching behavior of the liquid crystal layer 3 is as follows. Dielectric anisotropy, elastic modulus, spiral pitch, skeleton structure and side chain of polymer, phase separation process, polymer and liquid crystal of the cholesteric liquid crystal that constitutes the liquid crystal layer 3. It can be controlled by the morphology of the interface, the degree of anchoring effect at the interface between the polymer and the liquid crystal, which is determined by the total of these. Specifically, the types and composition ratios of nematic liquid crystals, the types of chiral agents, the types of resins, the types and compositional ratios of monomers, oligomers, initiators, cross-linking agents, etc., which are the starting materials for polymer resins, polymerization temperatures, light Exposure light source for polymerization, exposure intensity, exposure time, atmosphere temperature, electron beam intensity for electron beam polymerization, exposure time, atmosphere temperature, solvent type and composition ratio during coating, solution concentration, wet film thickness, drying The temperature, the starting temperature at the time of the temperature decrease, the temperature decrease rate, etc. are not limited to these.

Next, the operation of the voltage applying section and the light irradiating section of the electronic recording medium overwriting apparatus utilizing such characteristics of the electronic recording medium will be described.

FIG. 10 is a diagram showing an example of the operation of the voltage applying section and the light irradiating section and changes in the optical characteristics of the electronic recording medium.

In FIG. 10, (A) shows the voltage applied to the electronic recording medium from the voltage applying section, and (B) shows the exposure light (700 μm) applied to the electronic recording medium from the light irradiation section.
(having a wavelength range of m or more), (C) is
The portion of the electronic recording medium irradiated with the exposure light represents the reflectance, and (D) represents the reflectance of the portion of the electronic recording medium not irradiated with the exposure light. The horizontal axis represents the time transition.

First, as a first step, an AC pulse voltage not lower than Vfpu shown in FIG. 8 is applied for T1 time to reset the electronic recording medium (A). As a result, the liquid crystal layer 3 of the electronic recording medium is in the planar phase, so that the liquid crystal layer has uniformly high reflectance (C) and (D). Even if the application time T1 of the AC pulse voltage elapses and the application of the voltage is stopped,
Since the planar phase has a memory property, the liquid crystal layer 3 maintains a high reflectance as it is.

Next, as a second step, a voltage of Vpfe or more and Vpfu or less shown in FIG. 8 is applied for T2 time (A). However, until the exposure light is irradiated (B),
The planar phase is retained and exhibits selective reflection (C),
(D).

After that, when the exposure is started (B), the voltage distributed to the liquid crystal layer 3 in the portion irradiated with the exposure light increases, so that the liquid crystal layer 3 transits from the planar phase to the focal conic phase. The reflectance decreases. Even after the exposure is completed (C), since the focal conic phase has a memory property, the liquid crystal layer 3 maintains the low reflectance state as it is. On the other hand, since the planar phase is retained in the portion of the electronic recording medium which is not irradiated with the exposure light, the state where the reflectance is high is retained and the selective reflection is continued (D).

FIG. 11 is a diagram showing another example of the operation of the voltage applying section and the light irradiating section and changes in the optical characteristics of the electronic recording medium.

In FIG. 11, (A) shows the voltage applied to the electronic recording medium from the voltage applying section, and (B) shows the exposure light (700 μm) applied to the electronic recording medium from the light irradiation section.
(having a wavelength range of m or more), (C) is
The portion of the electronic recording medium irradiated with the exposure light represents the reflectance, and (D) represents the reflectance of the portion of the electronic recording medium not irradiated with the exposure light. The horizontal axis represents the time transition.

First, as a first step, while applying a voltage of Vfpe or more and Vfpu or less shown in FIG. 8 for T1 time (A), the entire photoconductor layer 4 is exposed (B), and electronic recording is performed. Reset the media. As a result, the liquid crystal layer 3 of the electronic recording medium is in the planar phase, so that the liquid crystal layer has uniformly high reflectance (C) and (D). Even when the application time T1 of the AC pulse voltage elapses and the application of the voltage and the irradiation of the exposure light are stopped, the planar phase has a memory property, so that the liquid crystal layer 3 maintains a high reflectance as it is.

Next, as a second step, a voltage of Vpfe or more and Vpfu or less shown in FIG. 8 is applied.
The planar phase is retained and exhibits selective reflection until the exposure is started.

After that, when the exposure is started (B), the voltage distributed to the liquid crystal layer 3 increases in the portion irradiated with the exposure light, so that the liquid crystal layer 3 changes from the planar phase to the focal conic phase, The reflectance decreases. After that, even if the exposure is completed (B), the focal conic phase has a memory property, so that the liquid crystal layer 3 maintains the low reflectance as it is (C). On the other hand, in the portion of the electronic recording medium which is not irradiated with the exposure light, the planar phase is retained, so that the state where the reflectance is high is retained and the selective reflection is continued (D).

As described above, the voltage applying section of the electronic recording medium overwriting apparatus needs to supply different voltages in the first step and the second step.

In both of the operation examples described with reference to FIGS. 10 and 11, the exposure is performed after applying the voltage, but it is not always necessary to apply the voltage first.
The exposure may be performed first.

Here, the result of actually writing an image by disposing two electronic recording media in the electronic recording medium overwriting device will be described.

First, when the rectangular wave was applied at 50 Hz for 300 ms without exposing the photoconductor layer 4 of the electronic recording medium and then the voltage was turned off. When the amplitude of the rectangular wave was between 80 V and 140 V, The electronic recording medium looks transparent,
A whitish color was exhibited when the amplitude of the rectangular wave was 160 V or more.

On the other hand, after exposing the photoconductor layer 4 of the electronic recording medium to a rectangular wave at 50 Hz for 300 ms, the voltage was turned off. When the rectangular wave amplitude was between 75 V and 120 V, the The recording medium looks transparent,
A whitish color was exhibited when the amplitude of the rectangular wave was 130 V or more.

FIG. 12 is a flow chart showing the operation of the control section of the electronic recording medium overwriting apparatus of the first embodiment of the present invention.

In this embodiment, the control section simultaneously records the same visible image on the electronic recording mediums inserted in the electronic recording medium holder in a plural number, based on the exposure light emitted from the light emitting section.

Here, as the electronic recording medium, it is preferable to use the electronic recording medium of the first and second embodiments of the present invention described with reference to FIGS. 4 and 7, but FIGS. It may be the electronic recording medium of the first and second configuration examples described by using, and further, an electronic recording medium in which a visible image is recorded under the stimulus of both irradiation of exposure light and application of voltage. Anything is fine.

As shown in FIG. 12, a connector is attached to each of the plurality of electronic recording media, and the electronic recording media is inserted into the electronic recording medium holder. An electronic recording medium holder in which a plurality of electronic recording media are inserted is connected to a voltage applying section of a writing device (S-
1). When the image writing preparation is completed, an image signal for displaying the image information on the pattern generating unit is generated or selected (S-2). The exposure timing is detected based on the image signal displayed on the pattern generation unit (S-3), and the exposure light is emitted from the light emission unit when the timing comes (s).
-4). Further, the timing of applying the voltage for writing the image is also detected based on the image signal displayed on the pattern generation unit (S-5), and when the timing comes, the electronic recording medium of the electronic recording medium holder inserted into the electronic recording medium holder is attached to the voltage application unit. A predetermined threshold voltage is applied to a desired number of electronic recording media for a predetermined time (S-6), and a plurality of desired images are simultaneously recorded (S-7). After a lapse of a predetermined time, the voltage application is stopped (S-8), and the electronic recording medium on which the image is recorded is removed, or each electronic recording medium holder is removed from the electronic recording medium overwriting device.

When a voltage is applied simultaneously to a pair of electrodes of each of the electronic recording media thus mounted, and exposure is performed, the same image information is recorded on the plurality of electronic recording media.

In this case, it is preferable to use an electronic recording medium having a higher photoconductor layer sensitivity than that of the electronic recording medium located closer to the light irradiation portion of the electronic recording medium overwriting device than the electronic recording medium located closer to the light irradiation portion. Further, before the exposure, the electronic recording medium may be reset to the initial alignment state.

FIG. 13 is a diagram showing the light transmittance of the transparent substrate (PES) and ITO (ITOPES) on the transparent substrate, and FIG. 14 is a diagram showing the light transmittance of the photoconductor layer.

In FIGS. 13 and 14, the vertical axis represents the light transmittance and the horizontal axis represents the wavelength.

The amount of light reaching the liquid crystal layer of the electronic recording medium is
Since the light transmittance of the transparent substrate shown in FIG. 13 and ITO on the transparent substrate is multiplied by the light transmittance of the photoconductor layer shown in FIG. It is preferable that the electronic recording medium arranged at a position distant from the light irradiation section has a photoconductor having a higher sensitivity than that of the electronic recording medium arranged at a position closer to the light irradiation section.

FIG. 15 is a diagram showing the sensitivity of the photoconductor layer when the material and the film thickness are changed.

In FIG. 15, the vertical axis represents CRmax, the horizontal axis represents film thickness, and the bar graph in the figure represents the type of material.

As can be seen from the figure, the sensitivity can be arbitrarily set by changing the material and the film thickness. Therefore, as an embodiment of the electronic recording medium overwriting method of the present invention, it is possible to prepare a plurality of electronic recording media having different required amounts of exposure light by creating electronic recording media of different materials and film thicknesses. it can. In addition, a plurality of electronic recording media each having a different required amount of exposure light are classified according to whether they are arranged in advance at a position near or far from the light irradiation unit, and a plurality of sheets are superposed.
It can be inserted in the electronic recording medium folder.

Next, an electronic recording medium overwriting device according to a second embodiment of the present invention will be described.

This embodiment is the second embodiment of the electronic recording medium overwriting apparatus of the present invention, the embodiment of the electronic recording medium overwriting method of the present invention, and the embodiment of the electronic recording medium holder of the present invention. Equivalent to.

The electronic recording medium overwriting apparatus of this embodiment is different from the electronic recording medium overwriting apparatus of the first embodiment in that the exposure light is changed to sequentially represent different images on a plurality of electronic recording media. However, it is different in that different images are sequentially recorded on different electronic recording media by applying a voltage to the electronic recording medium for recording the modified images while irradiating the changed exposure light. Since the other points are common, only the operation of the control section of the electronic recording medium overwriting apparatus, which is the difference, will be described.

FIG. 16 is a flow chart showing the operation of the control unit of the electronic recording medium overwriting device according to the second embodiment of the present invention.

In the present embodiment, different images are recorded on each electronic recording medium inserted in the electronic recording medium holder. Therefore, the operation of the control unit is
This is performed by repeating the flow of the image writing process in the first embodiment described with reference to FIG. 12 for each electronic recording medium for the number of sheets to be recorded.

Here, as the electronic recording medium, it is preferable to use the electronic recording medium of the first and second embodiments of the present invention described with reference to FIGS. 4 and 7, but FIGS. It may be the electronic recording medium of the first and second configuration examples described by using, and further, an electronic recording medium in which a visible image is recorded under the stimulus of both irradiation of exposure light and application of voltage. Anything is fine.

In FIG. 16, a connector is attached to each of the plurality of electronic recording media, and the electronic recording media holder is inserted. An electronic recording medium holder in which a plurality of electronic recording media are inserted is connected to the voltage applying section of the writing device (S-
1). When the image writing preparation is completed, an image signal for displaying the image information on the pattern generating unit is generated or selected (S-2), and the steps up to the exposure are performed in the same procedure as the flow in the first embodiment. Executed (S-3 ~
4).

Next, in the present embodiment, it is necessary to write different images on a plurality of electronic recording media, so the external connection terminals in the medium connection section of the electronic recording medium holder should be
The writing voltage is switched for each electronic recording medium to which it is applied (S-5). Then, the timing of applying the writing voltage for writing the image on the switched electronic recording medium is detected based on the image signal displayed on the pattern generation unit (S-
6) After that, a desired image is recorded by the same procedure as the flow in the first embodiment (S-7 to 8), and the voltage application is stopped after a predetermined time has passed (S-9). After writing the image on the first electronic recording medium,
Write a different image on the first electronic recording medium. Since the procedure for the second and subsequent sheets is the same as the procedure for the first sheet, duplicate description will be omitted.

The order of writing in the electronic recording medium in this embodiment is sequentially switched from the electronic recording medium farthest from the light irradiating section toward the electronic recording medium arranged in the vicinity, and the write voltage is applied. It is preferable. Further, before the exposure, the electronic recording medium may be reset to the initial alignment state.

As described above, once attached to the electronic recording medium overwriting device, different image information can be continuously recorded on a plurality of electronic recording media.

[0129]

According to the electronic recording medium, the electronic recording medium overwriting device, the electronic recording medium overwriting method, and the electronic recording medium holder of the present invention, the same image information is simultaneously written on a plurality of electronic recording media. Alternatively, a plurality of different image information can be continuously written in each electronic recording medium.
Further, a plurality of electronic recording media can be inserted into a portable holder, and image information can be written or rewritten for each holder and can be carried. As a result, the troublesomeness of mounting the electronic recording medium each time writing or rewriting is reduced, and the convenience can be improved by obtaining a plurality of image information.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an electronic recording medium overwriting device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a first configuration example of an electronic recording medium used in the electronic recording medium writing device of the first embodiment of the present invention.

FIG. 3 is a diagram showing a second configuration example of an electronic recording medium used in the electronic recording medium writing device of the first embodiment of the present invention.

FIG. 4 is a diagram showing a first embodiment of an electronic recording medium used in the electronic recording medium writing device of the first embodiment of the present invention.

FIG. 5 is a graph showing the absorbance of the light shielding layer of the first embodiment of the electronic recording medium.

FIG. 6 is a diagram showing the absorptance of the photoconductor layer of the first embodiment of the electronic recording medium.

FIG. 7 is a diagram showing a first embodiment of an electronic recording medium used in the electronic recording medium writing device of the first embodiment of the present invention.

FIG. 8 is a schematic diagram showing a switching behavior of an electronic recording medium connected to the electronic recording medium overwriting device of the present embodiment.

FIG. 9 shows an equivalent circuit of the electronic recording medium of the present embodiment.

FIG. 10 shows an example of actions of a voltage applying section and a light irradiation section,
It is a figure which shows the optical characteristic change of an electronic recording medium.

FIG. 11 is a diagram showing another example of the operation of the voltage applying section and the light irradiating section and changes in the optical characteristics of the electronic recording medium.

FIG. 12 is a flowchart showing an operation of a control unit of the electronic recording medium overwriting device according to the first embodiment of the present invention.

FIG. 13: Transparent substrate (PES) and ITO on transparent substrate
It is a figure which shows the light transmittance with (ITOPES).

FIG. 14 is a diagram showing the light transmittance of a photoconductor layer.

FIG. 15 is a diagram showing the sensitivity of the photoconductor layer when the material and the film thickness are changed.

FIG. 16 is a flowchart showing an operation of a control unit of the electronic recording medium overwriting device according to the second embodiment of the present invention.

[Explanation of symbols]

1a, 1b substrate 2a, 2b electrodes 3 Liquid crystal layer 4 Photoconductor layer 5 capsules 6 Light-shielding layer 7 functional layers 8 Image recording layer 10 Electronic recording medium holder 11 Media connection 12 connectors 13 External connection electrode 14 Electronic recording media 20 Voltage application section 21 Drive signal communication unit 22 Drive signal switching unit 23 Drive pulse generator 30 exposure section 31 Optical Write Signal Communication Unit 32 Timing control unit 34 Light irradiation unit 35 pattern generator 40 control unit

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Naoki Hiji             Fuji Zero, 2274 Hongo, Ebina City, Kanagawa Prefecture             Co., Ltd. Ebina Office (72) Inventor Yasunori Saito             Fuji Zero, 2274 Hongo, Ebina City, Kanagawa Prefecture             Co., Ltd. Ebina Office F-term (reference) 2H088 EA62 HA06 HA14 HA29                 2H089 HA27 KA17 KA20 TA03 TA07                       TA13 TA19                 2H092 GA45 KA05 KA07 KA09 RA10                 2H093 NC71 NC90

Claims (9)

[Claims] 1. A plurality of electronic recording media, on which a visible image is recorded by being stimulated by both irradiation of exposure light representing an image and application of a voltage, are arranged in a superposed manner, and these electronic recording media are arranged in a superposed manner. An electronic recording medium overwriting device for recording a visible image on each electronic recording medium, comprising: a light irradiation unit for irradiating a plurality of arranged electronic recording media with exposure light; and a plurality of arranged plural electronic recording media. A voltage application unit that applies an image writing voltage to each of the electronic recording media, and exposure light that represents an image is irradiated to a plurality of electronic recording media that are arranged, and a visible image that is the same as the image is recorded. An electronic recording medium overwriting apparatus comprising: a control unit that controls the light irradiation unit and the voltage application unit so that an image writing voltage is applied to the electronic recording medium. 2. The control section irradiates a plurality of arranged electronic recording media with exposure light and simultaneously applies an image writing voltage to the arranged plurality of electronic recording media. 2. The electronic recording medium overlay according to claim 1, wherein the light irradiation section and the voltage application section are controlled so that the same visible image is recorded on each of the electronic recording media. Device. 3. The control unit irradiates a plurality of arranged electronic recording media with exposure light representing an image and applies an image writing voltage to the electronic recording medium on which the same visible image as the image is recorded. The visible image is recorded on each of the electronic recording media by repeating the applied image writing process while changing the exposure light representing different images and applying the image writing voltage to different electronic recording media. The electronic recording medium overwriting apparatus according to claim 1, wherein the light irradiation section and the voltage application section are controlled as described above. 4. The light irradiator and the controller so as to perform a reset such that a uniform initial image is recorded on the electronic recording medium before recording a visible image on the electronic recording medium. The electronic recording medium overwriting device according to claim 1, wherein the electronic recording medium overwriting device controls a voltage application unit. 5. A plurality of electronic recording media, on which a visible image is recorded by being stimulated by both irradiation of exposure light representing an image and application of a voltage, are arranged in a predetermined image writing section in an overlapping manner. An electronic recording characterized by irradiating the plurality of electronic recording media arranged in the image writing section with exposure light and applying an image writing voltage to each of the plurality of electronic recording media. Medium overwriting method. 6. A plurality of electronic recording media having different required amounts of exposure light for recording the same image are prepared, and the plurality of electronic recording media are arranged in the image writing section in a superposed manner. 6. The electronic recording according to claim 5, wherein the plurality of electronic recording media are arranged so that the electronic recording media having the smaller required light amount are arranged closer to the side irradiated with the exposure light. Medium overwriting method. 7. An electronic recording medium, one end portion of which is insertably / removably inserted independently from each other, and a plurality of medium connecting portions which are inserted in a state of being superposed on each other and an electronic recording medium which is inserted into the medium connecting portion. An electronic recording medium holder, comprising: a connector for applying an image writing voltage. 8. An image recording layer on which a visible image is recorded by irradiating an exposure light representing an image and receiving a stimulus by applying a voltage, and at least the exposure light when the exposure light is applied to the image recording layer. An electronic recording medium comprising: a functional layer that is transparent and at least has a function layer that blocks an outside scene when a visible image recorded in the image recording layer is observed. 9. The electronic recording medium according to claim 8, wherein the functional layer has a light-shielding property of transmitting exposure light having a wavelength in a predetermined band and blocking an outside scene.