JP3906652B2 - Electronic recording medium overwriting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electronic recording medium overwriting apparatus for copying information from a recording medium such as a display device or paper used for OA equipment, information communication terminal equipment, POS terminal, etc., and an electronic recording medium writing method used for the apparatus. , An electronic recording medium holder, and an electronic recording medium on which information is written.
[0002]
[Prior art]
Conventionally, a display panel formed using a plastic film substrate such as a polymer film is advantageous in that it is thinner, lighter, and can be bent than a display panel formed using a glass substrate. The advantages of this type of display device for handheld electronic devices can be fully demonstrated.
[0003]
In particular, a liquid crystal display device using a composite of self-holding liquid crystal and resin in which cholesteric liquid crystal is dispersed in a transparent resin material has stable memory characteristics and an active drive circuit such as TFT liquid crystal. Attention has been focused on the fact that high-definition display is possible with simple matrix driving.
[0004]
In particular, a light-receiving display that utilizes the light scattering mode of cholesteric liquid crystal that provides high reflection contrast for both high-speed display and high resolution is easy to see because there is no flicker. In addition to meeting the needs of being easy on the eyes, it also has the ability to display and save information without a power source, as well as the memory content of the displayed content, thus meeting the needs of energy saving and environmentally friendly Yes.
[0005]
Further, a system that composes an electronic recording medium by combining a composite of a self-holding liquid crystal and a resin and a photoconductor, applies a voltage to the electronic recording medium and irradiates exposure light to display a visible image. Is powerful as a printer that uses electronic recording media instead of paper, and is also useful as a tool that transforms the conventional style of making a hard copy of information displayed on an electronic display device and then browsing it, By taking advantage of the property that it can be used repeatedly, it is possible to realize resource saving and waste saving.
[0006]
Assuming that an electronic recording medium using this liquid crystal is picked up in the same manner as paper or moved in hand, information is obtained by applying voltage to the electronic recording medium or irradiating exposure light. It is considered that it is more convenient to use the writing device for writing and the electronic recording medium in a separable manner.
[0007]
However, when the electronic recording medium and the writing device are separated, the electronic recording medium retains only the information that is actually recorded in the same manner as the paper medium, and the characteristic that it can be rewritten repeatedly is fully utilized. Not.
[0008]
On the other hand, the writing device that irradiates the exposure light while applying a voltage is displayed on an image display body such as a light-emitting electronic display that displays image information or a material having translucency. Since both a light emitting unit that irradiates an image with exposure light from the back side and a voltage applying unit that applies a voltage to the electronic recording medium are required, it is not easy to configure as a portable type.
[0009]
Japanese Patent Application Laid-Open No. 11-237644 discloses a method of performing sequential exposure while moving a laser beam or a light emitting diode array in order to reduce the size of an electronic recording medium overwriting apparatus for electronic recording media.
[0010]
According to this method, since it is not necessary to simultaneously expose the entire surface of the electronic recording medium, it is possible to reduce the size of the entire electronic recording medium overwriting apparatus by reducing the size of the light irradiation unit.
[0011]
However, this disclosed method has a problem in that the speed of writing image information on an electronic recording medium is reduced, so that the need to display image information at high speed cannot be satisfied.
[0012]
In addition, when rewriting the image information of the electronic recording medium in a state separated from the electronic recording medium overwriting device, bring the electronic recording medium to the place where the electronic recording medium overwriting device is installed, There is the trouble of attaching the electronic recording medium brought to the electronic recording medium overwriting device one by one and exposing the electronic recording medium while applying a voltage. Furthermore, 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 people or places, the electronic recording media are attached to the electronic recording medium overwriting device one by one. However, there is an annoyance of applying voltage and exposing the electronic display sheet. The troublesome task of attaching the electronic recording medium to the electronic recording medium overwriting device is not lost even if the electronic recording medium overwriting device is downsized and the electronic recording medium overwriting device can be carried. It seems to be a problem. In addition, when a plurality of electronic recording media are arranged in an overlapping manner, and an image is written by exposing to the plurality of electronic recording media from the same exposure means, a function of blocking the outside scene and a function of transmitting exposure light are provided. At the same time, it is necessary to record an image with the same contrast on each of the superimposed electronic recording media.
[0013]
[Problems to be solved by the invention]
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 eliminates the trouble of attaching the electronic recording media to the electronic recording medium overwriting device one by one. An electronic recording medium overwriting device, an electronic recording medium overwriting method, an electronic recording medium holder, and an electronic recording medium overwriting method that improve convenience when recording or rewriting image information on a plurality of electronic recording media, and An object is to provide an electronic recording medium.
[0014]
[Means for Solving the Problems]
An electronic recording medium overwriting apparatus according to the present invention that achieves the above object includes a plurality of electronic recording media on which a visible image is recorded by receiving stimulation 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 media arranged and superimposed,
A light irradiation unit that irradiates exposure light toward a plurality of electronic recording media arranged; and
A voltage applying unit that applies an image writing voltage to each of the plurality of electronic recording media disposed; and
The light irradiation is performed so that exposure light representing an image is irradiated to a plurality of arranged electronic recording media and an image writing voltage is applied to the electronic recording medium on which a visible image identical to the image is recorded. And a control unit for controlling the voltage application unit.
[0015]
Here, the control unit is configured to irradiate exposure light toward a plurality of arranged electronic recording media and simultaneously apply an image writing voltage to the plurality of arranged electronic recording media. The light irradiation unit and the voltage application unit are preferably controlled so that the same visible image is recorded on each of the electronic recording media.
[0016]
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 a visible image identical to the image is recorded. Each visible image is recorded on each of the electronic recording media by repeating the writing process while changing to exposure light representing different images and applying an image writing voltage to different electronic recording media. Further, it is preferable to control the light irradiation unit and the voltage application unit.
[0017]
Further, prior to recording a visible image on the electronic recording medium, the control unit performs the reset so that a uniform initial image is recorded on the electronic recording medium, and the light irradiation unit and the voltage application unit. It is also a preferred embodiment that the control is performed.
[0018]
The electronic recording medium overwriting method of the present invention that achieves the above object includes a plurality of electronic recording media on which a visible image is recorded by receiving both stimulation of exposure light representing an image and application of voltage. Arrange it over a predetermined image writing unit,
The plurality of electronic recording media arranged in the image writing unit is irradiated with exposure light, and an image writing voltage is applied to each of the plurality of electronic recording media.
[0019]
Here, a plurality of electronic recording media having different light amounts of exposure light for recording the same image are prepared,
In arranging a plurality of electronic recording media to be superimposed on the image writing unit, the plurality of electronic recording media are arranged such that the required light quantity is smaller as the exposure light is irradiated. It is also a preferable aspect to arrange them in such a manner.
[0020]
The electronic recording medium holder of the present invention that achieves the above-described object is provided with a medium connecting portion into which a plurality of end portions of the electronic recording medium are inserted so as to be freely inserted and removed, and inserted into the medium connecting portion. And a connector for independently applying an image writing voltage to each of the electronic recording media.
[0021]
The electronic recording medium of the present invention that achieves the above object includes an image recording layer on which a visible image is recorded by receiving stimulation by irradiation of exposure light representing an image, and at least when the exposure light is irradiated onto the image recording layer. It has a functional layer that transmits the exposure light and at least blocks an outside scene when observing a visible image recorded on the image recording layer.
[0022]
Here, it is also a preferable aspect that the functional layer has a light shielding performance that transmits exposure light having a wavelength in a predetermined band and blocks an outside scene.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of an electronic recording medium overwriting apparatus according to the present invention will be described below.
[0024]
FIG. 1 is a schematic configuration diagram showing an electronic recording medium overwriting apparatus according to a first embodiment of the present invention.
[0025]
This embodiment corresponds to the first embodiment of the electronic recording medium overwriting device 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. .
[0026]
The electronic recording medium overwriting apparatus shown in FIG. 1 includes an electronic recording medium holder 10 that connects a voltage application unit 20, a light irradiation unit 30, a control unit 40, and a plurality of electronic recording media 14 and the voltage application unit 20. The instruction to the electronic recording medium overwriting device is made via the control unit 40 by a keyboard or mouse operation of a personal computer (PC) connected to the electronic recording medium overwriting device.
[0027]
The electronic recording medium holder 10 is attached to each end of the electronic recording medium 14 and has a connector 2 having an external connection electrode 13 connected to a pair of electrodes of the electronic recording medium 14, and the connector 12 when the connector 12 is inserted. The external connection electrode 13 includes a medium connection unit 11 connected to the voltage application unit 20 of the electronic recording medium overwriting device, and the electronic recording medium overwriting is performed with a plurality of electronic recording media 14 being inserted. The apparatus can be freely attached to and detached from the apparatus, and the apparatus can be carried separately from the electronic recording medium overwriting apparatus.
[0028]
The control unit 20 irradiates each of the plurality of electronic recording media 14 connected to the medium connection unit 11 based on the contents instructed by the operation of the PC with appropriate exposure light and performs appropriate image writing. The light irradiation unit 30 and the voltage application unit 20 are controlled so that a working voltage is applied.
[0029]
The voltage application unit 20 is inserted into the medium connection unit 11 based on a drive signal communication unit 21 that transmits a command signal issued by the control unit 40 and a signal transmitted from the drive signal communication unit 21, and is connected to the voltage application unit 20. A drive signal switching unit 22 that switches a drive signal for applying a collective voltage or an individual voltage to each connected electronic recording medium 14, and a predetermined pulse voltage is generated based on the drive signal to generate a predetermined electronic recording medium 14 It comprises a drive pulse generator 23 to be applied to.
[0030]
The light irradiation unit 30 transmits a write signal emitted from the control unit 40, and a timing signal that irradiates the electronic recording medium 14 with exposure light based on the signal transmitted from the light write signal communication unit 31. A timing control circuit 32 for generating the image signal, an image signal unit 3 for generating an image signal for displaying image information on the pattern generation unit 35 as necessary, and a light irradiation unit 34 for irradiating exposure light from the back of the pattern generation unit 35. And a pattern generation unit 35 for displaying an image to be recorded on the electronic recording medium 4.
[0031]
As described above, the electronic recording medium 14 is attached to the one end thereof, and the connector 12 is inserted into the medium connecting portion 11 of the electronic recording medium overwriting device, whereby the electronic recording medium 14 is overlapped with the electronic recording medium. It can be connected to the voltage application unit 20 of the writing 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 from the electronic recording medium overwriting device as it is, so that it is convenient for carrying and a plurality of rewriting operations can be performed. The electronic recording medium holder can be simply connected to the electronic recording medium overwriting device as it is while the electronic recording medium is held.
[0032]
In this way, 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 same recording is simultaneously applied to the plurality of electronic recording media 14 by a single attachment. Image information can be recorded.
[0033]
Next, the electronic recording medium used in the first embodiment of the electronic recording medium overwriting apparatus of the present invention will be described.
[0034]
FIG. 2 is a diagram illustrating a first configuration example of an electronic recording medium used in the electronic recording medium writing apparatus according to the first embodiment of the present invention.
[0035]
In the electronic recording medium shown in FIG. 2, silica, glass, or plastic spacers are scattered between the transparent upper substrate 1a and the organic photoconductor layer 4 on the transparent lower substrate 1b, and the thickness of the liquid crystal layer. Is controlled to be several μm to several tens of μm.
[0036]
In FIG. 2, the electronic recording medium has a transparent upper substrate 1a and a transparent lower substrate 1b, each of which is provided with a transparent electrode film and connected to an external connection electrode of the connector. A transparent electrode 2a and a transparent electrode 2b are formed.
[0037]
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, indium oxide, or a mixture of indium oxide and tin oxide. An ITO (indium tin oxide) film made of, for example, is used.
[0038]
The method for forming the electrode film on the transparent substrates 1a and 1b is not particularly limited, and is formed by a method such as vapor deposition or sputtering. The form of the electrode film can be arbitrarily formed according to the display contents that require display, and can be formed into a striped electrode pattern for dot matrix display or an electrode pattern for segment display by etching. Can do. Moreover, a striped electrode pattern and a segment display electrode pattern can be mixed.
[0039]
The transparent substrate is made of a material that is transparent to visible light, such as soda glass or Corning 7059, but is not limited thereto. In the case of using a flexible substrate as the transparent substrate, the material of the plastic film substrate is a crystalline polymer such as uniaxial or biaxially stretched polyethylene terephthalate, an amorphous polymer such as polystyrene or polyethersulfone, polyethylene, polypropylene, etc. Polyolefins such as polycarbonate, polyamides such as polycarbonate and nylon are used. The transparent substrate having a thickness of 0.3 mm or less, preferably 20 to 200 μm can be used.
[0040]
If necessary, functional films such as a wear-resistant layer and a gas barrier layer may be formed on the surface of the transparent substrate.
[0041]
The cholesteric liquid crystal constituting the liquid crystal layer 3 includes Schiff base, azo, azoxy, biphenyl, terphenyl, benzoate, tolan, pyrimidine, cyclohexanecarboxylate, phenylcyclohexane, dioxane. A material obtained by adding an optically active chiral agent such as an ester derivative, a cyanobiphenyl derivative, or a bisanneal derivative to a nematic liquid crystal having positive dielectric anisotropy such as a system, or a mixture thereof can be used.
[0042]
The helical pitch of the cholesteric liquid crystal is adjusted by the amount of chiral agent added to the nematic liquid crystal. For example, when the display color is blue, the center wavelength of selective reflection is 400 to 500 nm, when the display color is green, the center wavelength of selective reflection is 500 to 600 nm, and the display color is red. Makes the center wavelength of selective reflection in the range of 600 to 700 nm. 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 temperature twisting or exhibiting temperature dependence acting in reverse may be added.
[0043]
The liquid crystal layer 3 forms a self-holding type liquid crystal-resin composite composed of cholesteric liquid crystal and a transparent resin. A PNLC (Polymer Network Liquid Crystal) structure including a network-like resin in the continuous phase of cholesteric liquid crystal, or a polymer A PDLC (Polymer Discharged Liquid Crystal) structure in which cholesteric liquid crystal is dispersed in the form of droplets can be used. The PNLC structure and PDLC structure are a method of phase-separating a polymer and liquid crystal, for example, mixing a polymer precursor polymerized by heat, light, electron beam, etc., such as acrylic, thiol, epoxy, etc. A PIPS (Polymerization Induced Phase Separatio) method in which polymer is polymerized from the above state, an emulsion in which a polymer having low liquid crystal solubility such as polyvinyl alcohol is mixed with liquid crystal, stirred and suspended, and the liquid crystal is dispersed in droplets in the polymer. The TIPS (Thermally Induced Phase Separation) method, in which a thermoplastic polymer and liquid crystal are mixed, cooled to a homogeneous phase and then cooled and phase-separated, the polymer and liquid crystal are dissolved in a solvent such as chloroform, and the solvent is evaporated. Phase separation of polymer and liquid crystal Causing SIPS (SolventInduced Phase Separation) method can be formed by such as, but not limited thereto.
[0044]
The photoconductor layer 4 may use any of a charge transfer complex type, a eutectic complex type, and a stacked type. Specifically, poly-N-vinylcarbazole / 2,4,7-trinitrofluorenone, triphenylmethane compound dispersed in eutectic of bililium salt and polycarbonate, organic compounds such as azo compounds and phthalocyanine compounds For example, a charge generation material composed of a pigment and a low molecular transport material of a charge carrier dissolved and dispersed in a general-purpose resin such as polyester or polycarbonate can be used. The material is not limited to the above materials as long as the dielectric constant and the electrical conductivity change greatly by exposure to specific light.
[0045]
FIG. 3 is a diagram illustrating a second configuration example of the electronic recording medium used in the electronic recording medium writing apparatus according to the first embodiment of the present invention.
[0046]
Compared to the first configuration example, the electronic recording medium shown in FIG. 3 has a liquid crystal layer 3 in which a cholesteric liquid crystal is dispersed in droplets in a polymer support porous structure to form a PDLC structure. The spacer is omitted by the microcapsule 5 formed in the above. In addition, since the cholesteric liquid crystal is encapsulated, the memory performance of the image and the mechanical resistance of the electronic recording medium are improved. Further, in such a liquid crystal in which the capsule 5 is dispersed, in a state where an electric field is not applied between the two transparent substrates, the light is reflected by the liquid crystal in the capsule 5 so that the liquid crystal can be seen milky white, and the electric field is applied. In this state, the liquid crystal and the liquid crystal in the capsule 5 are transparent.
[0047]
As shown in FIG. 3, the electronic recording medium includes a transparent film (PET) substrate 1a on the upper surface, an electrode 2a on which ITO is patterned on the substrate 1a, and a capsule in which a cholesteric liquid crystal is encapsulated with a polymer on the electrode 2a. It consists of a liquid crystal layer 5 uniformly coated with the solution, a photoconductive layer 4, a transparent film (PET) substrate 1b on the lower surface, and an electrode 2b in which ITO is patterned on the substrate 1b.
A solution in which capsules 5 in which cholesteric liquid crystal is encapsulated with a polymer is dispersed on an ITO electrode 2a on a film (PET) substrate (thickness 125 μm) 1a is uniformly applied by a functional thin film printing apparatus or applicator. The coating film thickness of the cholesteric liquid crystal solution is set so that the cholesteric liquid crystal film thickness when the solvent evaporates is about the same as or larger than the diameter of the capsule used. As the solvent for dissolving the liquid crystal, general solvents such as aromatic, aliphatic and alcoholic solvents can be used.
[0048]
The coating area of the cholesteric liquid crystal is applied smaller than the area where the pair of transparent substrates are overlapped.
[0049]
In this configuration example, the cholesteric liquid crystal is applied by a functional thin film printing apparatus or applicator. However, the present invention is not limited to this method. For example, a printing plate such as screen printing, a dispenser or a spray coater is used. Alternatively, the coating area may be moved.
[0050]
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 method of placing a transparent substrate coated with cholesteric liquid crystal using a hot plate, a method of blowing warm air, a method of irradiating infrared rays or microwaves, a method of applying cholesteric liquid crystal coated substrate 1a Examples include a method in which a heated metal roll such as a heated stainless steel roll is pressed from the back side of the cholesteric liquid crystal coated surface and heated.
[0051]
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, the lower transparent substrate 1b with the other lower transparent electrode 2b (PET, thickness 125 μm) is laminated on the cholesteric liquid crystal application surface of the upper transparent substrate 1a by the substrate laminator so that the electrode surface is in contact with the cholesteric liquid crystal.
As a laminating method, the upper transparent substrate 1a coated with the cholesteric liquid crystal 3 is passed along with the lower transparent substrate 1b coated with the photoconductor 4 between two rollers incorporating a heater for heating.
[0052]
As another lamination method, the upper transparent substrate 1a coated with the cholesteric liquid crystal 3 is fixed from the back surface of the transparent electrode 2a to a flat stage with a built-in heater.
[0053]
The other lower transparent substrate 1b is positioned so that the transparent electrode 2a of the upper transparent substrate 1a fixed on the flat stage and the transparent electrode 2b on the other lower transparent substrate 1b face each other, and a heater is incorporated. The adhering head is adsorbed and fixed from the back surface of the transparent electrode 2b.
[0054]
The substrate laminator is positioned so that the transparent electrode surface 2b of the lower transparent substrate 1b adsorbed and fixed to the pasting head faces the surface coated with the cholesteric liquid crystal, and from the end, a pasting roller with a built-in heater inside. Are sequentially stacked by moving the.
[0055]
More specifically, when the heater inside the flat stage for fixing the upper transparent substrate 1a coated with cholesteric liquid crystal and the heater inside the attaching head for fixing the lower transparent substrate 1b and a pair of transparent substrates are laminated. The heaters inside the pasting rollers are set to the same temperature in consideration of the thermal expansion of the transparent substrates.
[0056]
Further, when stacking a pair of substrates, all the built-in heaters are set to 110 ° C. so as not to bite microbubbles in the liquid crystal layer 3 sandwiched between the pair of transparent substrates 1a and 1b. .
[0057]
According to this method, for example, in the case of a flexible substrate, since the pair of plastic film substrates are heated to the same temperature, there is no problem that the ends of the plastic film substrate are curled and the transparent electrode is torn.
[0058]
In this configuration example, the method of applying the cholesteric liquid crystal to the transparent substrate is shown. However, a photoconductor or a light shielding film is formed between the transparent electrode of the transparent substrate and the cholesteric liquid crystal on the transparent electrode of the other transparent substrate. In this case, it can be performed in the same manner as the present application method.
[0059]
Next, a first embodiment of the electronic recording medium used in the first embodiment of the electronic recording medium overwriting apparatus of the present invention will be described.
[0060]
FIG. 4 is a diagram showing a first embodiment of an electronic recording medium used in the electronic recording medium overwriting apparatus according to the first embodiment of the present invention.
[0061]
Compared with the first configuration example described with reference to FIG. 2, the first embodiment of the electronic recording medium is provided between the liquid crystal layer 3 and the photoconductive layer 4 of the image recording layer 8 on which a visible image is recorded. The difference is that a functional layer 7 that transmits exposure light and blocks the outside scene is formed.
[0062]
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 showing an electrical characteristic distribution according to the light amount distribution of the exposure light by irradiation of the exposure light, and a partial pressure distributed according to the electrical characteristic distribution of the photoconductor layer 4. Applied to the liquid crystal layer 3 on which a visible image is recorded according to the optical characteristic distribution according to the partial pressure, and formed between the photoconductor layer 4 and the liquid crystal layer 3. It consists of a functional layer 7 that transmits the exposure light when irradiated with the exposure light and blocks the outside scene when observing a visible image recorded on the liquid crystal layer 3.
[0063]
In the electronic recording medium overwriting device according to the first embodiment of the present invention, a plurality of electronic recording media are stacked and irradiated with exposure light to record a visible image on the electronic recording medium. Therefore, the electronic recording medium needs to have a functional layer 7 that transmits part of the exposure light and blocks the outside scene during observation. The optical requirements of the functional layer 7 that blocks the outside scene differ depending on which optical change the image recording layer 8 uses. For example, when the image recording layer 8 uses a change in absorption coefficient, white scattering is required, and when the image recording layer 8 uses a change in reflectance, light absorption is required and the change in scattering coefficient is used. If it is, it is necessary to select appropriately according to the image recording layer 8 because specular reflectivity is required. In addition, the functional layer 7 can also laminate | stack a light absorption material and a light reflection material as needed.
[0064]
For the functional layer 7, for example, black polyimide BKR-105 manufactured by Nippon Kayaku Co., Ltd. is formed to a thickness of 0.7 μm by spin coating, and CK7800L manufactured by Dainippon Ink is formed to a thickness of 1.2 μm by a spin coater. Further, a black paint PC-Black-006P (manufactured by Nippon Kayaku Co., Ltd.) and an aqueous solution of polyvinyl alcohol dip-coated to form a 2 μm thickness, a 4 μm thick black PET resin film, or the like can be used. By using these, the functional layer 7 that hardly transmits visible light can be formed.
[0065]
Examples of the material used for the liquid crystal layer 3 having an electrical response by partial pressure include, for example, a chiral nematic liquid crystal, a smectic A liquid crystal, a chiral smectic C liquid crystal, a bistable twisted nematic liquid crystal, a fine particle dispersed liquid crystal, a Gyricon element, Memory display elements such as electrophoretic elements can be used.
[0066]
The material of the photoconductor layer 4 includes a photoconductive material (1) and a photovoltaic material (2). (1) Examples of photoconductive materials include (a) inorganic semiconductor materials such as amorphous silicon, ZnSe, and CdS, and organic semiconductor materials such as anthracene and polyvinylcarbazole. (B) a charge generating material that generates charges when irradiated with light. , Perylene-based, phthalocyanine-based, bisazo-based, dithiopytochelopyrrole-based, squarylium-based, azurenium-based, thiapyrylium-polycarbonate-based compounds, and other charge transport materials that transport the generated charges, such as trinitrofluorene-based, polyvinylcarbazole-based Oxadiazole, pyralizone, hydrazone, stilbene, triphenylamine, triphenylmethane, diamine compounds, LiClO _Four (2) As a photovoltaic material, a semiconductor having a pn junction (silicon, compound semiconductor, organic, etc.) is used. Semiconductor) can be used. The electroresponsive material and the photoelectric effect material can be used in various composite forms such as a mixture, a laminate, and a microcapsule.
[0067]
As the optical material having the above-described electrical response, a liquid crystal material causes an optical change at a low electric field, and as a particularly preferable liquid crystal material, cyanobiphenyl-based, phenylcyclohexyl-based, phenylbenzoate-based, cyclohexylbenzoate-based, azomethine-based, azobenzene-based, Known liquid crystal compositions such as pyrimidine, dioxane, cyclohexylcyclohexane, stilbene, and tolan can be used. Additives such as pigments and fine particles may be added to the liquid crystal material. Moreover, the thing disperse | distributed in the polymer matrix, the thing gelatinized, and the thing encapsulated may be used. Moreover, any of high molecular liquid crystal, medium molecular liquid crystal, and low molecular liquid crystal may be used, or a mixture thereof may be used.
[0068]
As described above, by separating the functions, advantages such as increased sensitivity to the amount of exposure light, enabling writing with a low electric field, and widening choices of materials can be obtained.
[0069]
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 configuration example, a duplicate description is omitted here.
[0070]
FIG. 5 is a graph showing the absorbance of the functional layer of the electronic recording medium according to the first embodiment.
[0071]
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.
[0072]
As is apparent from the figure, although wavelengths below 600 nm absorb and hardly transmit, infrared light above 700 nm transmits and hardly absorbs light. Therefore, if the wavelength region around 700 nm is used as exposure light, these substances can be used as the functional layer 7 of the present embodiment because they shield the display wavelength region but transmit the exposure light.
[0073]
Here, if the wavelength range of the exposure light representing the image is within the visible wavelength range, transparency occurs in the wavelength range. Therefore, the wavelength range of the exposure light is preferably outside the visible wavelength range, that is, at a wavelength of 400 nm or less or 700 nm or more. . Generally, the wavelength range of 400 to 800 nm is said to be the visible wavelength range, but the wavelength range of 700 to 800 nm is low because it has low visibility. If the wavelength range of exposure light representing an image can be set to 800 nm or more, it is more desirable. preferable. When the wavelength range of exposure light representing an image is set within the visible wavelength range, it is better to narrow the width of the wavelength range of exposure light for the purpose of suppressing the degree of transparency, and it is preferably 100 nm or less, more preferably 50 nm or less. Is desirable.
[0074]
The transmittance of the functional layer in the display wavelength region is desirably 10% or less, more preferably 1% or less.
[0075]
Here, as a method for controlling the transmittance of the functional layer for each wavelength region, there are a method using the wavelength dependency of the reflectance and a method using the wavelength dependency of the extinction coefficient. In the former case, for example, By using a dielectric multilayer film, a cholesteric liquid crystal having selective reflection, etc. as the functional layer, in the latter case, for example, a coloring material containing a dye or pigment having an appropriate absorption spectrum, or between two polarizers. This can be realized by using a material sandwiching a phase difference plate.
[0076]
FIG. 6 is a graph showing the absorptance of the photoconductor layer of the electronic recording medium of the first embodiment.
[0077]
In FIG. 6, the vertical axis represents the light absorptance and the horizontal axis represents the wavelength, and the curves in the figure represent the wavelength characteristics of the light absorptance for various substances used in the photoconductive layer.
[0078]
As is apparent from the figure, the photoconductor layer hardly absorbs light in the vicinity of 500 nm, but absorbs light in the wavelength region of 700 nm or more, and the resistance value changes.
[0079]
Therefore, as is apparent from FIGS. 5 and 6, when writing image information on an electronic recording medium having a functional layer, a plurality of electronic recording media are overlaid with exposure light having a wavelength of 700 nm or more. However, it becomes possible to write a visible image.
[0080]
Here, the functional layer 7 has a function of making the transmittance variable by applying an external stimulus and making the functional layer 7 in a transmissive state by applying an external stimulus only at the time of exposure to transmit a part of the exposure light. When observing, it is possible to provide a function of blocking the outside scene.
[0081]
FIG. 7 is a diagram showing a second embodiment of an electronic recording medium used in the electronic recording medium writing apparatus according to the first embodiment of the present invention.
[0082]
The electronic recording medium of the second embodiment is different in the liquid crystal layer 3 of the image recording layer 8 from the electronic recording medium of the first embodiment described with reference to FIG. To do. The liquid crystal layer 3 is the same as that of the second configuration example described with reference to FIG. Therefore, the same components are denoted by the same reference numerals and description thereof is omitted.
[0083]
In FIG. 7, a functional layer 7 is formed between the photoconductive layer 4 and the liquid crystal layer 3 of the image recording layer 8. The liquid crystal layer 3 is obtained by droplet-dispersing cholesteric liquid crystal in a polymer supporting porous structure, and a spacer is omitted by a capsule 5 formed around the liquid crystal by forming a PDLC structure.
[0084]
When the functional layer 7 is sandwiched between the liquid crystal layer 3 and the photoconductive layer 4 as shown in FIGS. 4 and 7, the liquid crystal layer is used when an image is written from the back side where the photoconductive layer 4 is present. Illumination light applied to the photoconductive layer 4 from the surface side 3 is blocked by the functional layer 7, so that the performance of writing an image on the electronic recording medium is improved. Further, when observing an image, the electronic recording medium can be seen through and the outside scene is not seen, so that the visible image can be seen clearly.
[0085]
FIG. 8 is a schematic diagram showing the switching behavior of the electronic recording medium connected to the electronic recording medium overwriting device of the present embodiment.
[0086]
In FIG. 8, the vertical axis represents the reflectance of the liquid crystal layer, and 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 transitions from the planar phase to the focal conic phase is Vpfe. At the time of non-exposure, the threshold voltage at which the liquid crystal layer 3 transitions from the planar phase to the focal conic phase is Vpfu. The threshold voltage at which the liquid crystal layer 3 transitions from the focal conic phase to the planar phase is Vfpe, and the threshold voltage at which the liquid crystal layer 3 transitions from the focal conic phase to the planar phase during non-exposure is Vfpu.
[0087]
As can be seen from the figure, if the applied voltage is set to a range of Va which is not less than Vpfe and not more than Vpfu, the electronic recording medium becomes a planar phase at the time of non-exposure and exhibits a black state with high reflectivity, but at the time of exposure. Because it transitions to the focal conic phase, it exhibits a transparent state with low reflectivity. Further, if the applied voltage is set within a range of Vc that is Vfpe or more and Vfpu or less, the electronic recording medium becomes a focal conic phase when non-exposure and exhibits a transparent state with a low reflectivity. Since it transitions, it presents a black state with high reflectivity.
[0088]
FIG. 9 shows an equivalent circuit of the electronic recording medium of the present embodiment.
[0089]
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. When the 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.
Here, C = CaCb / (Ca + Cb).
When using a charge transfer complex type or eutectic complex type organic photoreceptor for the photoconductor layer 4, simply controlling the coating film thickness, or using a stacked type organic photoreceptor, A sufficient threshold voltage difference can be obtained by simply controlling the thickness of the charge transport layer.
[0090]
On the other hand, the switching behavior of the liquid crystal layer 3 is that the cholesteric liquid crystal constituting the liquid crystal layer 3 has dielectric anisotropy, elastic modulus, helical pitch, polymer skeleton structure and side chain, phase separation process, and interface between polymer and liquid crystal. It can be controlled by the morphology, the degree of anchoring effect at the interface between the polymer and the liquid crystal determined by the synthesis of these. Specifically, the types and composition ratios of nematic liquid crystals, the types of chiral agents, the types of resins, the types and composition ratios of monomers, oligomers, initiators, crosslinkers, etc. that are starting materials for polymer resins, polymerization temperature, 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 temperature drop, the temperature drop rate, and the like are not necessarily limited thereto.
[0091]
Next, the operation of the voltage application unit and the light irradiation unit of the electronic recording medium overwriting apparatus will be described using such characteristics of the electronic recording medium.
[0092]
FIG. 10 is a diagram illustrating an example of the operation of the voltage application unit and the light irradiation unit and changes in optical characteristics of the electronic recording medium.
[0093]
10A shows the voltage applied to the electronic recording medium from the voltage application unit, and FIG. 10B shows the exposure light (having a wavelength region of 700 μm or more) irradiated from the light irradiation unit to the electronic recording medium. (C) represents the reflectance of the portion of the electronic recording medium that has been exposed to the exposure light, and (D) represents the reflectance of the portion of the electronic recording medium that has not been exposed to the exposure light. Appears. The horizontal axis represents the transition of time.
[0094]
First, as a first step, an AC pulse voltage equal to or higher 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 becomes a planar phase, and thus the liquid crystal layer has a uniform high reflectance (C) and (D). Even if the application time T1 of the AC pulse voltage elapses and the voltage application is stopped, the planar phase has a memory property, so that the liquid crystal layer 3 maintains a high reflectance as it is.
[0095]
Next, as a second step, a voltage not lower than Vpfe and not higher than Vpfu shown in FIG. 8 is applied for T2 time (A). However, until the exposure light is irradiated (B), the planar phase is maintained and selective reflection is exhibited (C) and (D).
[0096]
Then, when 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 transitions from the planar phase to the focal conic phase, and the reflectance is descend. Even after the exposure is finished (C), the focal conic phase has a memory property, so that the liquid crystal layer 3 is kept in a low reflectance state as it is. On the other hand, since the planar phase is maintained in the portion of the electronic recording medium that is not irradiated with the exposure light, the state of high reflectivity is maintained and selective reflection is continued (D).
[0097]
FIG. 11 is a diagram illustrating another example of the operation of the voltage application unit and the light irradiation unit, and changes in optical characteristics of the electronic recording medium.
[0098]
In FIG. 11, (A) represents a voltage applied to the electronic recording medium from the voltage application unit, and (B) represents exposure light (having a wavelength region of 700 μm or more) irradiated from the light irradiation unit to the electronic recording medium. (C) represents the reflectance of the portion of the electronic recording medium that has been exposed to the exposure light, and (D) represents the reflectance of the portion of the electronic recording medium that has not been exposed to the exposure light. Appears. The horizontal axis represents the transition of time.
[0099]
First, as a first step, the voltage of Vfpe or more and Vfpu or less shown in FIG. 8 is applied for T1 time (A), and the entire photoconductor layer 4 is exposed (B) to reset the electronic recording medium. To do. As a result, the liquid crystal layer 3 of the electronic recording medium becomes a planar phase, and thus the liquid crystal layer has a uniform high reflectance (C) and (D). Even when the application time T1 of the AC pulse voltage elapses and the application of voltage and the irradiation of 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.
[0100]
Next, as a second step, a voltage not lower than Vpfe and not higher than Vpfu shown in FIG. 8 is applied, but the planar phase is maintained and selective reflection is exhibited until exposure is started.
[0101]
After that, when 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, and the reflectance is descend. Even after the exposure is finished (B), since the focal conic phase has a memory property, the liquid crystal layer 3 maintains a low reflectance as it is (C). On the other hand, since the planar phase is maintained in the portion of the electronic recording medium that is not irradiated with the exposure light, the state of high reflectivity is maintained and selective reflection is continued (D).
[0102]
Thus, the voltage application unit of the electronic recording medium overwriting device needs to supply different voltages in the first step and the second step.
[0103]
In both of the operation examples described with reference to FIGS. 10 and 11, the exposure is performed after the voltage is applied. However, it is not always necessary to apply the voltage first, and the exposure may be performed first. .
[0104]
Here, a result of actually writing an image by arranging two electronic recording media in the electronic recording medium overwriting device will be described.
[0105]
First, without exposing the photoconductor layer 4 of the electronic recording medium, a rectangular wave was applied for 50 Hz for 300 ms and then the voltage was turned off. When the rectangular wave amplitude was between 80V and 140V, the electronic recording medium Seemed transparent and showed a whitish color when the amplitude of the rectangular wave was 160 V or higher.
[0106]
On the other hand, after exposing the photoconductor layer 4 of the electronic recording medium to a rectangular wave of 50 Hz for 300 ms and then turning off the voltage, when the amplitude of the rectangular wave is between 75V and 120V, the electronic recording medium is It appeared transparent and showed a whitish color when the amplitude of the rectangular wave was 130V or higher.
[0107]
FIG. 12 is a flowchart showing the operation of the control unit of the electronic recording medium overwriting apparatus according to the first embodiment of the present invention.
[0108]
In the present embodiment, the control unit simultaneously records the same visible image on an electronic recording medium that is inserted into a plurality of electronic recording medium holders based on the exposure light emitted from the light irradiation unit.
[0109]
Here, as the electronic recording medium, it is preferable to use the electronic recording medium according to the first and second embodiments of the present invention described with reference to FIGS. 4 and 7, but the description will be made with reference to FIGS. The electronic recording mediums of the first and second configuration examples may be used, and any electronic recording medium can be used as long as a visible image is recorded by receiving both exposure light irradiation and voltage application stimulation. Good.
[0110]
As shown in FIG. 12, a connector is attached to each of the plurality of electronic recording media and inserted into the electronic recording media holder. The electronic recording medium holder in which a plurality of electronic recording media are inserted is connected to the voltage application unit of the writing device (S-1). When the image writing preparation is completed, an image signal for displaying the image information on the pattern generation unit is generated or selected (S-2). The exposure timing is detected based on the image signal to be displayed on the pattern generation unit (S-3), and exposure light is emitted from the light irradiation unit when the timing comes (s-4). The timing for applying the voltage for writing the image is also detected based on the image signal to be displayed on the pattern generation unit (S-5). 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 recorded simultaneously (S-7). When the predetermined time has elapsed, the voltage application is stopped (S-8), and the electronic recording medium on which the image has been recorded is removed, or the electronic recording medium holder is removed from the electronic recording medium overwriting device.
[0111]
When a voltage is simultaneously applied to a pair of electrodes of each of the electronic recording media mounted in this way and exposure is performed, the same image information is recorded on the plurality of electronic recording media.
[0112]
In this case, it is preferable to use a photoconductor layer having a higher sensitivity to the electronic recording medium farther from the light irradiation unit than the electronic recording medium near the light irradiation unit of the electronic recording medium overwriting device. Further, before the exposure, the electronic recording medium may be reset to the initial alignment state.
[0113]
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.
[0114]
13 and 14, the vertical axis represents the light transmittance, and the horizontal axis represents the wavelength.
[0115]
The amount of light reaching the liquid crystal layer of the electronic recording medium is obtained by multiplying the light transmittance of the transparent substrate shown in FIG. 13 and ITO on the transparent substrate by the light transmittance of the photoconductor layer shown in FIG. Therefore, the sensitivity of the photoconductor is higher in the electronic recording medium arranged at a position away from the light irradiation section of the electronic recording medium overwriting device than in the electronic recording medium arranged at a position near the light irradiation section. It is preferable to arrange a good one.
[0116]
FIG. 15 is a diagram showing the sensitivity of the photoconductor layer when the material and film thickness are changed.
[0117]
In FIG. 15, the vertical axis represents CRmax, the horizontal axis represents the film thickness, and the bar graph in the figure represents the type of material.
[0118]
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, by preparing electronic recording media having different materials and film thicknesses, it is possible to prepare a plurality of electronic recording media having different required amounts of exposure light. it can. In addition, a plurality of electronic recording media having different required amounts of exposure light are classified according to whether they are previously arranged at a position close to or far from the light irradiation unit, and a plurality of sheets are overlapped to form an electronic recording medium folder. Can be inserted.
[0119]
Next, an electronic recording medium overwriting apparatus according to a second embodiment of the present invention will be described.
[0120]
This embodiment corresponds to the second embodiment of the electronic recording medium overwriting device 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. .
[0121]
The electronic recording medium overwriting device of the present embodiment is changed to exposure light that sequentially displays different images on a plurality of electronic recording media, as compared with the electronic recording medium overwriting device of the first embodiment. The difference is that different images are sequentially recorded on different electronic recording media by applying a voltage to the electronic recording medium that records the changed image while irradiating the changed exposure light. Therefore, only the operation of the control unit of the electronic recording medium overwriting device, which is a difference, will be described.
[0122]
FIG. 16 is a flowchart showing the operation of the control unit of the electronic recording medium overwriting apparatus according to the second embodiment of the present invention.
[0123]
In this embodiment, different images are recorded on each of the electronic recording media inserted into the electronic recording media holder. Therefore, the operation of the control unit 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.
[0124]
Here, as the electronic recording medium, it is preferable to use the electronic recording medium according to the first and second embodiments of the present invention described with reference to FIGS. 4 and 7, but the description will be made with reference to FIGS. The electronic recording mediums of the first and second configuration examples may be used, and any electronic recording medium can be used as long as a visible image is recorded by receiving both exposure light irradiation and voltage application stimulation. Good.
[0125]
In FIG. 16, a connector is attached to each of the plurality of electronic recording media and inserted into the electronic recording media holder. The electronic recording medium holder in which a plurality of electronic recording media are inserted is connected to the voltage application unit of the writing device (S-1). When the image writing preparation is completed, an image signal for displaying image information on the pattern generation 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. It is executed (S-3-4).
[0126]
Next, in the present embodiment, since it is necessary to write different images on a plurality of electronic recording media, the external connection terminal in the medium connection portion of the electronic recording medium holder is connected to the electronic recording to which a writing voltage is applied. Switching is performed for each medium (S-5). And the timing which applies the voltage for writing which writes an image in the switched electronic recording medium is detected based on the image signal displayed on a pattern generation part (S-6), and it is the same as that of the flow in 1st Embodiment below. The desired image is recorded by the procedure (S-7 to 8), and the voltage application is stopped when a predetermined time has elapsed (S-9). When the writing of the image on the first electronic recording medium is completed, a different image is written on the second electronic recording medium. Since the procedure for the second and subsequent sheets is the same as the procedure for the first sheet, a duplicate description is omitted.
[0127]
Note that the order of writing in the electronic recording medium in the present embodiment is preferably switched from the electronic recording medium farthest from the light irradiating unit to the electronic recording medium arranged nearby, and the writing voltage is applied. . Further, before the exposure, the electronic recording medium may be reset to the initial alignment state.
[0128]
In this way, once attached to the electronic recording medium overwriting device, different image information can be continuously recorded on a plurality of electronic recording media.
[0129]
【The invention's effect】
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 can be simultaneously written on a plurality of electronic recording media, Image information can be continuously written to 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. Thereby, the troublesomeness of attaching the electronic recording medium every time writing or rewriting is reduced, and convenience is improved by obtaining a plurality of pieces of image information.
[Brief description of the 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 illustrating a first configuration example of an electronic recording medium used in the electronic recording medium writing apparatus according to the first embodiment of the present invention.
FIG. 3 is a diagram illustrating a second configuration example of the electronic recording medium used in the electronic recording medium writing apparatus according to 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 apparatus according to 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 graph 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 apparatus according to 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 is a diagram illustrating an example of the operation of a voltage application unit and a light irradiation unit, and changes in optical characteristics of an electronic recording medium.
FIG. 11 is a diagram illustrating another example of the operation of the voltage application unit and the light irradiation unit, and changes in optical characteristics of the electronic recording medium.
FIG. 12 is a flowchart showing the operation of the control unit of the electronic recording medium overwriting device according to the first embodiment of the present invention.
FIG. 13 is a diagram showing light transmittances of a transparent substrate (PES) and ITO (ITOPES) on the transparent substrate.
FIG. 14 is a diagram showing the light transmittance of the photoconductor layer.
FIG. 15 is a diagram showing the sensitivity of the photoconductor layer when the material and film thickness are changed.
FIG. 16 is a flowchart illustrating the operation of the 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 electrode
3 Liquid crystal layer
4 Photoconductor layer
5 capsules
6 Shading layer
7 Functional layer
8 Image recording layer
10 Electronic recording medium holder
11 Media connection
12 Connector
13 External connection electrode
14 Electronic recording media
20 Voltage application section
21 Drive signal communication unit
22 Drive signal switching part
23 Drive pulse generator
30 exposure part
31 Optical writing signal communication part
32 Timing controller
34 Light irradiation part
35 Pattern generator
40 Control unit

Claims (6)

Visible image Ru is recorded by receiving both the stimulation of an application of irradiation and the voltage of the exposure light representing an image, the visible image is arranged to be superposed plurality of electronic recording medium viewable individually, these An electronic recording medium overwriting device for recording a visible image on each of electronic recording media arranged in an overlapping manner,
A light irradiation unit that irradiates exposure light toward a plurality of electronic recording media arranged; and
A voltage applying unit that applies an image writing voltage to each of the plurality of electronic recording media disposed; and
A plurality of arranged electronic recording media are irradiated with exposure light representing an image, and a voltage for image writing is simultaneously applied to the arranged plurality of electronic recording media to each of the electronic recording media. An electronic recording medium overwriting apparatus comprising: a control unit that controls the light irradiation unit and the voltage application unit so that the same visible image is recorded . A visible image is recorded by receiving both stimulation of exposure light representing an image and application of a voltage, and a plurality of electronic recording media on which the recorded image can be browsed by a predetermined process are arranged and superimposed. An electronic recording medium overwriting device for recording a visible image on each of the electronic recording media arranged in an overlapping manner,
A light irradiation unit that irradiates exposure light toward a plurality of electronic recording media arranged; and
A voltage applying unit that applies an image writing voltage to each of the plurality of electronic recording media disposed; and
Image writing processing in which exposure light representing an image is irradiated to a plurality of arranged electronic recording media and an image writing voltage is applied to the electronic recording medium on which the same visible image as the image is recorded differs The light irradiating section and the light irradiating unit and the recording medium are recorded so that each visible image is recorded on each of the electronic recording media by repeating the change to the exposure light representing and applying the image writing voltage to the different electronic recording media. An electronic recording medium overwriting apparatus comprising: a control unit that controls the voltage application unit . Prior to recording a visible image on the electronic recording medium, the control unit controls the light irradiation unit and the voltage application unit to perform a reset that records a uniform initial image on the electronic recording medium. The electronic recording medium overwriting device according to claim 1 or 2, wherein The plurality of electronic recording media arranged in a superimposed manner are inserted into the medium connection portion, a medium connection portion inserted into a state where one end portions of the respective electronic recording media are detachably overlapped with each other, and inserted into the medium connection portion according to claim 1 or 2 electronic recording medium, characterized in that held by the electronic recording medium holder and a connector for applying an image writing voltage independently to each of the electronic storage medium Overwrite device. Each of the plurality of electronic recording media has an image recording layer on which a visible image is recorded by irradiation with exposure light representing an image and stimulation by applying a voltage, and at least exposure light to the image recording layer. 3. The electronic recording according to claim 1, further comprising a functional layer that transmits the exposure light at the time of irradiation and at least blocks an outside scene when observing a visible image recorded on the image recording layer. Medium overwriting device . 6. The electronic recording medium overwriting apparatus according to claim 5 , wherein the functional layer has a light shielding performance that transmits exposure light having a wavelength in a predetermined band and blocks an outside scene .

Images