JP4683877B2 - IMAGE RECORDING MEDIUM CONTAINING 2 Hue Dipolar Spherical Particles - Google Patents

Description

The present invention relates to an image recording medium having two-color dipolar spherical particles as a display medium. More specifically, the present invention relates to a charge-bipolar two-color spherical particle sealed in an electrodeless panel which is an opposing electrodeless sandwich substrate. The present invention relates to an image recording medium in which particles are inverted and discolored under dielectric polarization to display a colored image.
The present invention also relates to an image forming apparatus that displays a desired image using an image recording medium that forms an image through such two-color bipolar spherical particles sealed in such an electrodeless panel.

  In recent years, a wide variety of information has been output to the world as recording, storage, transmission, and display forms. Flat panel display devices such as plasma panels, liquid crystal panels, organic EL panels, etc., display units for personal computers, display plates for advertising / information transmission, portable information terminals for mobile phones, and image display units for game machines, televisions, etc. In addition, they are widely used for office display devices such as office equipment such as telephones, copying machines, facsimiles, printers, and home appliances such as washing machines, refrigerators, rice cookers. Among such display devices, display devices represented by flat panel displays such as PDP, LCD, ELD, etc. are large flat TVs, mobile phones, notebook and desktop computers, PDAs (small information devices), car navigation systems. As shown in the above, the trend is toward a large flat screen with a large screen, and on the other hand, the reality is that it is increasingly in the direction of lighter, smaller, thinner and power-saving. In addition, even in the power saving type, there is a demand for a display screen with a clearer, higher brightness and higher quality.

  As is well known, an LCD is a display that utilizes the electric field deflectability of an encapsulated liquid crystal between opposing sandwiching electrode substrates. The CRT is a self-luminous display that emits light by irradiating electrons with a cathode ray gun (CRT) onto the electrodeless blank tube surface with a phosphor. In addition, such an electronic paper (PLD) display developed in a completely different display system from LCDs and CRTs is, for example, a (−) white charge in a transparent insulating medium between the TFT back electrode substrate and the transparent electrode substrate. A microcapsule type electrophoretic type in which microcapsules containing particles and (+) black charged particles are encapsulated and migrated to the transparent electrode side by switching between both electrodes to form an image. This is a complete scattering display system that does not use a plate. In [Patent Document 1], two or more types of display bodies having different optical reflection characteristics (for example, dispersed in a solvent in a microcapsule that moves by applying an electric field located at an arbitrary position on a substrate (electrophoresis) (for example, , Magenta, yellow, and cyan), a multicolor display panel that displays an image based on detection of a color for each display body, position information as color information, and the like has been proposed.

  As described above, any of the PLD image displays that have been proposed in the past is to form an image by electrophoresing a display medium dispersed in an insulating liquid in a sealed electric field system. ], A monochromatic particle A1 charged with electrons (or holes) from a conductive substrate in an air medium layer that is transparent at least one side and sealed between opposing conductive sandwiched substrates, and A1 There has been proposed an image forming apparatus for forming an image by moving monochromatic particles A2 having different colors and chargeability under the electric conductive action of an electric field.

  [Patent Document 3] uses a surface-conduction electron-emitter display (SED) to emit light emitted from the SED to a phosphor similarly to a CRT. A SED system of a self-luminous flat display has been proposed. That is, a glass substrate provided with surface conduction electron-emitting devices corresponding to the number of pixels corresponding to a cathode ray gun of a blank tube and a glass substrate with a pair of phosphors are sealed in a high vacuum several mm gap. Stop panel. Unlike CRT, it does not require deflection of the electron beam, and even with a large screen exceeding 40 inches, the panel thickness may be about several centimeters, and the power consumption is about 1/3 compared to the current PDP. It is a self-luminous display that realizes brightness and clear colors that do not require liquid crystal and color filters.

  [Patent Document 4] describes that a conventional TFT-LCD is a switching element for an image signal because of a problem of a decrease in yield associated with higher density and higher definition of pixels and an increase in cost associated with an increase in screen size. Instead of the active-matrix TFT-LCD used as a liquid crystal display, there has been proposed a liquid crystal display of a PA-LCD that can improve the yield, reduce the cost, increase the pixel density, and increase the screen size. That is, a plasma address as an active matrix LCD using a plasma cell with a switching electrode as a plasma cell with a dielectric electrode provided across a dielectric sheet provided on a plasma channel provided with a stripe-shaped anode and cathode on a transparent substrate Liquid crystal display devices (PALC) have been proposed.

JP 2003-295235 A JP 2001-033833 A JP 2000-251643 A JP 2003-107447 A

  Under such circumstances, flat panel display devices such as LCDs and ELDs that are found in displays for mobile phones, notebook computers, PDAs (small information devices), car navigation systems, etc. have a display screen size that is large or small. As widely used. In recent years, PDP has been rapidly spread as a flat panel display for large-screen TVs. In addition, LCDs that have various problems related to yield, cost, high density, high definition, etc., are thinner than PDPs in relation to the technical problems of lower power consumption of PDPs. In order to enable further weight reduction and lower power consumption, for example, it has been developed as a flat panel display for a TV with a medium screen.

  In addition, the SED self-luminous display as the next-generation display described above has been proposed as a flat panel display used as a wall-mounted television, for example, as a low-power, thin large screen instead of PDP. ing. In addition, the PALC reflection type liquid crystal display as the next generation display as described above is replaced with the pixel switching TFT method as an active matrix of the conventional TFT-LCD, and the yield is improved, the cost is reduced, A PA-LCD (Plasma Address Liquid Crystal Display) type flat panel type display that enables high density and large screen size has been proposed. Furthermore, although various image display methods are completely different from any of the above-described LCD, LED, PDP, SED, PALC, and the like, various displays as PLDs have been proposed.

  In order to cope with such a wide variety of display formats, a wide variety of display devices have been developed, and in their application trends, all are used as flat panel type displays, but they are increasingly thinner, lighter, and power-saving. While it is in the direction of downsizing, it is increasingly thin, power-saving, and in the direction of upsizing of a large screen. In addition, referring to the technological trend, there is a demand for a display format that can further improve the display quality on a display screen with a high viewing angle, which is under the power-saving type, and cope with the increasingly diverse application trends. Yes. Furthermore, in the broadband media via the Internet, which is becoming increasingly widespread from the viewpoint of information, terminals, and networks, the display formats of the displays that carry the terminals are expected to become more and more diverse. However, it can be said that the display format has not yet been fully satisfied.

  Therefore, the present inventors have already described in Japanese Patent Application No. 03-391544, monodisperse particles having an average particle diameter in the range of 1 to 300 μm in the volume method and colored spherical resin particles color-coded into two hues and novel ones thereof. A manufacturing method was proposed. In addition, since the two-color colored spherical particles are expected to be used as, for example, a display medium for displaying an image, the two-colored spherical particles in which the two hues are charged in a positive (±) bipolar phase. Has proposed.

  Accordingly, the present inventors pay attention to the fact that the two-hue particles are easily inverted by inverting the two-hue particles by taking advantage of the feature that the two hues are (±) bipolar. A flat panel in which two glass plate panels, which are electrically insulating, are bonded to each other so as to have a gap of about 0.5 mm, was manufactured. In an air medium sealed between the panels, spherical particles having a particle diameter of 45 μm, black and white two-color phases, and polar particles (or bipolar particles) that are polarized in a (±) dipolar phase are encapsulated. . Next, when (±) electrodes were attached to both ends of this prototype electrodeless panel and this external electrode was turned on and off while applying a predetermined voltage, the ammeter did not shake at all, but the black and white phase was very smooth. The present inventors have found that the inverted discolored color image can be seen and completed the present invention.

  According to the present invention, it is possible to display (or record) a desired colored image by inverting and discoloring two-phase bipolar spherical particles of a display medium enclosed in an opposing electrodeless panel under dielectric polarization. An image recording medium is provided.

That is, the two electrodeless panel plates as the two electrodeless sandwiching substrates facing each other are at least a dielectric member made of a non-conductive material, and the image display side panel plate is a transparent dielectric member. Both electrodeless panel plates have at least equivalent dielectric constants. The display medium sealed in this panel has a mutually different second color, moreover, Ri Oh in bipolar spherical particles having a charge polarity different (±) together, the sealing panels to encapsulate the bipolar spherical particles Consists of an air medium tank .
Therefore, since the display medium enclosed in the electrodeless panel of the dielectric member is a bipolar spherical particle that is charged to the (±) bipolar, the panel emits electrons under, for example, a table. When placed underneath, this panel surface is also placed under an external electric field of a virtual electric field. The bipolar spherical particles in such a panel are image recording media that can be perceived (or recorded) as colored images by being inverted in polarization under dielectric polarization as ferroelectric two-phase spherical particles of ferroelectric material. .

  Further, as another object of the present invention, by using the image recording medium according to the present invention for recording and forming an image with such characteristics, an electrodeless panel which is a pair of two electrodeless sandwiched substrates facing each other is used. Provided is an image forming apparatus characterized in that a two-colored bipolar spherical particle of a display medium enclosed in a container is inverted and discolored under dielectric polarization under a virtual electric field to display a desired colored image.

In other words, the image recording medium to be used is air in which bipolar spherical particles having two different hues and different (±) charging polarities are provided in a pair of electrodeless panels facing each other as a display medium. Enclosed and dispersed in a medium tank .
The two electrodeless sandwiching substrates are dielectric members having a dielectric constant of at least the same level as that of the non-conductor, and the image display side sandwiching substrate is a transparent dielectric member.
When such an image recording medium forms an image, both panel plate surfaces on which the pair of electrodeless panels are placed under a virtual electric field are (±) as pattern signals for forming a desired pattern image under dielectric polarization by a computer command. ) Since the pair of band electrodes are formed, the enclosed bipolar two-color spherical particles are rapidly reversed in polarity along the pattern virtual electric field to display a colored image of a desired pattern on the image recording medium. Can be made.

  From the above, the recording medium for forming an image provided by the present invention is for a flat panel display, and the sealed cell enclosing the display medium of two-color spherical particles is a narrow dielectric member having no counter electrode. It consists of a holding panel board. In addition, the dielectric constant of the opposing pair of dielectric panel plates allows the (positive) and (negative) pairs of charged polarities to be smoothly formed on the sandwich panel plate under a virtual electric field formed during image display. It is important that the dielectric constants are substantially the same and have the same dielectric constant.

  That is, by placing this sandwich panel plate under application of a predetermined voltage via an external electrode, both panel plates are dielectrics, so if any panel surface is (-) charged without current flowing. At the same time, the opposite panel surface is (+) charged under dielectric polarization, and the sandwich panel plate is placed under a virtual electric field. In such a pair of dielectric sandwich panels exhibiting a (±) charging polarity under such a virtual electric field, the two-phase bipolar spherical particles encapsulated as a display medium are charged in advance in a (±) band. Since the electrode is provided, the soot is also encapsulated as “two-color spontaneously polarized particles” which are ferroelectrics. The “two-color spontaneously polarized particles” enclosed in the dielectric panel under the virtual electric field are easily reversed in polarity by the action of rotational torque by switching the charge of the virtual electric field. Since it is a two-color particle at the same time, it is possible to clearly perceive a discoloration display through this polarization reversal. Therefore, the “reversal torque” of the two-color spherical particle that is charged in bipolar in an electrodeless panel is charged. The image can be displayed.

  Therefore, in the present invention, in order to place the sandwich panel panel under the virtual electric field in this way, in addition to dealing with a predetermined charge application through the external electrode described above, in the present invention, For example, a surface conduction electron-emitting device method (SED method), an electrolytic electron-emitting device method (FED method), a cold cathode ray method (MIM method), a plasma discharge method, or a corona discharge method By any one of the countermeasures selected from the above, by emitting electrons or ions, at least the surface of the dielectric member having substantially the same dielectric constant is easily charged (+) under dielectric polarization. The sandwich panel panel can be placed under a virtual electric field of (±).

  The best mode for carrying out the image recording medium and the image recording apparatus using the image recording medium according to the present invention will be further described below.

  As described above, the opposing electrodes are not provided on the two opposing panel plates on which the image of the image recording medium according to the present invention is formed. In this electrodeless panel, two-color spherical particles, bipolar spherical particles having different (±) charged polarities are encapsulated as a display medium. Moreover, the two opposing panel plates are characterized by being composed of a non-conductive dielectric member having at least an equivalent dielectric constant.

  Therefore, when either one of the opposing dielectric panel plates is irradiated with electrons or ions from the outside, for example, the (−) pole is easily charged and the other opposing panel surface has a pair of electrodes. The (+) pole is dielectrically charged. In the present invention, the opposing electrodeless panel plate is placed in such a virtual electric field, so that the polar two-color spherical particles encapsulated in the opposing panel plate are made of ferroelectric bipolar particles ( Or a spontaneously polarized particle), the rotating torque, that is, the reversing torque easily acts on this virtual electric field to cause reversal discoloration and display a desired colored image.

  That is, further explanation will be given with reference to the conceptual sectional view of the image recording medium according to the present invention shown in FIGS. A predetermined electric field (E) can be applied to the opposing panel plates 20 and 21 of the dielectric member, for example, via an external electrode, as shown in FIG. Although no current flows through the dielectric panel plate in such an applied state, (−) charging is performed on the “panel 20” surface, and at the same time, (+) charging is performed on the “panel 21” surface. Is made. In this state, in the present invention, the non-electrode panel “20/21” plane is placed under a virtual electric field of “(−) / (+)”. Therefore, in FIG. 2B, for example, the “spontaneously polarized two-color spherical” of the encapsulated “two-colored spherical particle 1” facing the (−)-charged panel 20 surface with the same (−) polar charge. As shown in the figure, the polarization reversal of the concentric axis is “(±) 1” → “(±) 2” → “(±) 3” → “(±) 4” → “( As shown in the exploded inversion diagram of ±) 5 ”, the image is perceived as white → black dot image. Next, as shown in FIG. 1A, the displayed black dots are instantly concentric with the “20/21” plane being switched to a virtual electric field of “(+) / (−)”. As shown in the exploded inversion diagram of “(±) 6” → “(±) 7” → “(±) 8” → “(±) 9” → “(±) 10”, The dot image is erased or deleted.

  Therefore, in the present invention, instead of such a “white / black” two-phase bipolar spherical particle image display medium, in this panel, for example, red / white, yellow / white, blue / white, green Two-color dipolar spherical particles of “chromatic hue / white hue” such as white / purple / white can be encapsulated. Therefore, in the present invention, an image recording medium for reversal discoloration images in monotone (monochrome) including “black / white” can be suitably used. For example, by combining at least two chromatic colors selected from red / white, yellow / white, blue / white, green / white, purple / white, etc., a mixed color consisting of “chromatic hue / white hue” An image display medium encapsulated with two-phase dipolar spherical particles can be suitably used as appropriate.

  Accordingly, the image recording medium according to the present invention includes other chromatic monotone (single color) image display including “black / white” and “existence” in two opposing sealed panel plates made of a dielectric member. Encapsulating so as to form a plurality of pixel groups in which one pixel (or one dot) corresponds to one of two-color dipolar spherical particles that enables multicolor image display of two or more colors of “chroma / white”. Can do.

  Therefore, in the present invention, the two-color dipolar spherical particles encapsulated in this way make the display image clear, so that the average particle diameter on a volume basis is in the range of 20 to 400 μm, preferably 30 to It is preferably 300 μm and is preferably monodisperse particles because of the rotational property to be reversed. In addition, a gap of 0.4 to 1.5 mm is provided between the electrodeless panels facing each other, and preferably 0.6 to 1.2 mm in view of display image clarity, image stability, reversibility, and the like. It is preferable to provide a gap.

  Further, in the present invention, the inside of the sealed panel plate in which the two-color bipolar spherical particles of the image display medium are enclosed is preferably a dispersion medium that is an air medium tank in which air is enclosed under normal pressure. Moreover, in view of the bipolar chargeability of the two-color dipolar spherical particles, a dispersion medium having an appropriate humidity (20 to 90% in terms of relative humidity HR) may be used. Further, in the present invention, as long as it is not required to be chemically or physically eroded and deformed so as to inhibit the reversibility of the two-phase bipolar spherical particles of the dispersion medium in the sealed panel plate, a dielectric material is used. An organic solvent can also be used as a dispersion medium.

  From the above, by using the image recording medium according to the present invention having such characteristics, the image recording apparatus as shown in FIG. 2 can be appropriately implemented according to the present invention as described below.

  FIG. 2 is a conceptual sectional view of an image recording apparatus using the image recording medium according to the present invention. Between the two panel plates having “dielectric sheet 20” / “dielectric sheet 21” facing each other of two dielectric sheets having the same dielectric constant and having a sheet thickness in the range of 0.01 to 1 mm Is formed with a sealed air medium tank 25 having a gap width of 0.6 to 1.2 mm. In this medium tank 25, two-color bipolar spherical particles (11, 12) are enclosed. Further, as described above in detail, the two-color bipolar spherical particles (11, 12) to be encapsulated form a group of pixels (dots) that are inverted and discolored under a virtual electric field in the present invention to display an image. Encapsulated and dispersed as an image display medium.

  In addition, in the sealed air medium tank 25 formed with a gap width of 0.6 to 1.2 mm provided in both electrodeless panel bodies as the image recording medium, a two-color bipolar having a particle diameter in the range of 20 to 400 μm is provided. The spherical particles (11, 12) are encapsulated and dispersed so as to form an infinitely single-stage phase, and encapsulated at a maximum dispersion density in a range that does not hinder smooth reversal discoloration under a virtual electric field. The chromatic hues of these two hues include black / white, for example, any one of “chromatic hue / white hue” such as red / white, yellow / white, blue / white, green / white, purple / white, etc. Two hue dipolar spherical particles can be encapsulated. In the present invention, each of the sealed air medium tanks 25 may be a single monotone, or may be sealed as a display medium for forming a multicolor image in which these plural colors are appropriately mixed.

  Therefore, in the image recording apparatus according to the present invention, for example, [transparent dielectric sheet 20/2 hue spherical particles (11, 12) -enclosed air medium tank 25 / dielectric sheet 21] as shown in FIG. A sealed type “electron emission tank unit 40” is provided on both electrodeless panel bodies having the structure. The electron emission tank unit 40 emits electrons to a desired spot charging group on the surface of the dielectric sheet 21, and charges the desired surface of the surface of the dielectric sheet 21 to (-). At this point, in the present invention, the opposite surface of the opposing transparent dielectric sheet 20 is instantaneously dielectrically polarized and charged to (+). Therefore, the two-color dipolar spherical particles 12 of the air medium tank 25 are placed under a virtual electric field, and as already apparent from the description of FIGS. 1 (a) and (b), the two-color dipolar spherical particles 12 are It is displayed as a part of the pixels that are inverted and discolored to form a desired image.

  Thus, in the present invention, the electrons emitted from the sealed electron emission tank unit 40 are irradiated in a planar manner through, for example, the “surface conduction electron-emitting device” 30 provided in the electron emission tank unit 40. In the present invention, the “surface conduction electron-emitting device” 30 is a desired pattern image under the computer of the generation signal circuit 32 (or the operation circuit 32 of the surface conduction electron-emitting device) provided via the dielectric sheet 31. By operating as the pattern signal DS33 for forming the surface, the surface of the dielectric sheet 21 via the “surface conduction electron-emitting device” 30 causes the electrons to be (−) charged in the “S-shaped” pattern. Released. As a result, the two-phase dipolar spherical particles 12 group that are (+) charged in the “S-shaped” shape on the opposite surface of the transparent dielectric sheet 20 and placed under such a virtual electric field are, for example, illustrated in FIG. The “S-shaped” image that is the house mark of Soken Chemical Co., Ltd. shown in FIG.

  In the present invention, as an operation source for starting (or driving) an image recording medium mounted on the image forming apparatus, the above-described operation may be performed as long as the opposing dielectric panel plate of the image recording medium is dealt with under a virtual electric field. The method is not limited to the surface conduction electron-emitting device method (SED method), and is selected from, for example, the electrolytic electron-emitting device method (FED method), the cold cathode ray method (MIM method), the plasma discharge method, and the corona discharge method. Any electron emission or ion emission method can be mentioned as appropriate.

  Therefore, as a method for producing dichromatic dipolar spherical particles that are display media of the image recording medium of the present invention, the present inventors have already disclosed in Japanese Patent Application No. 03-391544 that the average particle diameter represented by the volume method is in the range of 1 to 300 μm. A method for producing microchannels of two-color spherical particles that are monodispersed particles and are color-divided into two hues and form a (±) dipolar phase expected as a display medium for displaying an image is proposed.

  That is, according to this microchannel manufacturing method, the colored continuous phase and the spherical particle phase are in an O / W type or W / O type relationship with each other, and from the first microchannel in which the colored continuous phase is transferred, In the spherical particleized phase of the flowing medium flowing in the second microchannel, two colored continuous phases are sequentially ejected to form a two-color spherical polymer particle, which is appropriately used as a bipolar spherical particle having a charge (±) polarity. To be prepared.

  In the oily or aqueous fluid medium containing the polymerizable resin component, the polymerizable resin components in the colored continuous phase containing the colored dye / pigment insoluble in the medium are separated from each other, and are different from each other. Formed with positively and negatively charged polymerizable monomers and transferred to the first microchannel, and this colored continuous phase is then continuously or intermittently introduced into the aqueous or oily spherical particulate phase flowing in the second microchannel. Are discharged sequentially. Next, the discharged material discharged into the spherical particle phase is gradually formed into spherical particles during the series of discharge, dispersion, and transfer in the microchannel, and then into spherical particles. The polymerizable resin component in the polymerized particles is polymerized and cured under UV irradiation and / or heating to appropriately prepare dichromatic dipolar spherical particles.

  Therefore, the colored continuous phase in the present invention is a continuous hue divided into two hues and includes black / white, for example, red / white, yellow / white, blue / white, green / white, purple There can be mentioned any two phase separation hues selected from “chromatic hue / white hue” such as / white. The dye / pigment for forming such a hue is appropriately selected without particular limitation as long as it is insoluble or uniformly dispersed in a fluid dispersion medium containing a polymerizable resin component described later, which is preferably used in the present invention. Used in

  In the present invention, any oil-soluble dye that is preferably less soluble in water than the monomer is suitably used. As the oil-soluble dye, for example, black ... Olesolol Fast Black, 5% of Solvent Black 27Cr (trivalent), Pigment Black7 / water, red ... VALIFAST RED 3306, Olesolol Fast RED BL, Solvent RED 8Cr (3 Value) 5.8% contained, Blue ... Kaya Set Blue, Solvent Blue 35, Yellow ... VALIFAST YELLOW 4120, Oil Yellow 129, Solvent Yellow 16, Solvent Yellow 33, Disperse Yellow 54, Green ... Oil Green 502, Opias Green 502, Solvent Green 3, Magenta ... VALIFAST PINK 2310N, Plast RED D-54, Plast RED 8355, Plast RED 8360, Solvent RED 149, Solvent RED 49, Solvent RED 52, Cyan ... VALIFAST BLUE 2610, VALIFAST BLUE 2606, Oil BLUE 650, Plast BLUE 8580, Plast BLUE 8540, etc. can be mentioned. Moreover, various direct dyes, acid dyes, basic dyes, azoic dyes, reactive dyes, fluorescent dyes and fluorescent brighteners can be used as necessary.

  Examples of pigments include, for example, permanent yellow DHG, Lionol Yellow 1212B, Shimler First Yellow 4400, Pigment Yellow 12, Pigment Red 57: 1, Lionol Red 6B-4290G, Irgarite Rubin 4BL, Fast as Magenta Pigment Gensuper Magenta RH, Cyan Pigment Lionol Blue 7027, Fast Gen Blue BB, Chromophthal Blue 4GNP, Black Pigment Carbon Black, Black Pearls 430, Titanium White, Lithopone, Charcoal Cal, Bengala, Cadmium Red, Chromium Permillion, Yellow lead, zinc yellow, barium yellow, cobalt yellow, emerald green, cobalt green viridian, ultramarine, brussian blue, cobalt blue, egyptian blue, manganese violet, koba Door violet, a variety of organic and inorganic pigments such as Mars purple, or the like can also be used.

  The addition amount of the dyes and pigments as these colorants is not particularly limited, and the desired color tone varies depending on the use of the colored particles, and the dispersibility in the above-described colored continuous phase, etc. From the above, in the present invention, 0.1 to 20 parts by weight, preferably 2 to 10 parts by weight, is suitably added per 100 parts by weight of the total polymerizable resin component which is a polymerization curing component in the colored continuous phase. can do.

  Therefore, from such a viewpoint, as the polymerizable resin component (or polymerizable monomer) used in the present invention is apparent from the monomer species shown as specific examples of the polymerizable monomers listed below, the polymerizable property used in the present invention. Depending on the type of the functional group or substituent of the monomer, the chargeability of the two-phase dipolar spherical particles already used in the present invention should be a monomer type that tends to exhibit (−) chargeability and (+) chargeability, respectively. Can do. Therefore, in the case where at least two or more kinds of monomers are used as the polymerizable resin component in the present invention, the tendency to show the (+) and (−) chargeability is well known, A plurality of monomers having a tendency of property can be used in combination as appropriate.

  On the other hand, in the polymerizable resin component (or polymerizable monomer) having at least one functional group and / or substituent in the molecule, examples of the functional group or substituent include a carbonyl group, a vinyl group, a phenyl group, Examples thereof include an amino group, an amide group, an imide group, a hydroxyl group, a halogen group, a sulfonic acid group, an epoxy group, and a urethane bond. In this invention, it can use suitably suitably combining the monomer type which has a functional group or a substituent in such a polymerizable monomer individually or in combination of 2 or more types.

  Therefore, examples of the polymerizable monomer having a (−) chargeability tendency include (meth) acrylic acid aryl esters; (meth) acrylic acid phenyl, (meth) acrylic acid benzyl, and the like. (Meth) acrylic acid-2-chloroethyl and the like, and nitrile groups; acrylonitrile, methacrylonitrile and the like, and epoxy group-containing polymerizable compounds; glycidyl (meth) acrylate, maleic acid Mono and diglycidyl esters of fumaric acid, mono and diglycidyl esters of fumaric acid, mono and diglycidyl esters of crotonic acid, mono and diglycidyl esters of tetrahydrophthalic acid, mono and glycidyl esters of itaconic acid, etc. Glycidyl ester, p-styrene carbo Examples include hydroxy glycidyl esters of acids, and the hydroxy group-containing polymerizable compounds include: (meth) acrylic acid-2-hydroxyethyl, (meth) acrylic acid-2-hydroxypropyl, (meth) acrylic acid and polypropylene glycol Examples of fluorovinyl monomers include: trifluorodimethyl (meth) acrylate, 2-trifluoromethylethyl (meth) acrylate, 2-perfluoromethylethyl (meth) acrylate, ( Fluorine-substituted (meth) acrylic acid alkyl esters such as (meth) acrylic acid-2-perfluoroethyl and (meth) acrylic acid perfluoromethyl, and the like. Examples of unsaturated carboxylic acids include: acrylic acid and methacrylic acid , Tetrahydrophthalic acid, itaconic acid, citraconic acid, crotonic acid, maleic acid Fumaric acid, isocrotonic acid, and norbornene dicarboxylic acid. In addition, maleic anhydride as these derivatives, itaconic anhydride, citraconic anhydride, tetrahydrophthalic anhydride, etc. phthalic acid.

  Examples of (poly) alkylene glycol diacrylates include: ethylene glycol diacrylate, diethylene glycol diacrylate, triethylene glycol diacrylate, tripropylene glycol diacrylate, etc. (Poly) alkylene glycol dimethacrylates: ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, triethylene glycol dimethacrylate, polyethylene glycol diacrylate, propylene glycol dimethacrylate Examples thereof include acid esters and dimethacrylic acid esters of tripropylene glycol.

  Examples of the styrenic monomer include alkyl styrene; styrene, methyl styrene, dimethyl styrene, trimethyl styrene, ethyl styrene, diethyl styrene, triethyl styrene, propyl styrene, butyl styrene, hexyl styrene, heptyl styrene, octyl styrene, and the like. Examples of halogenated styrenes include: fluorostyrene, chlorostyrene, bromostyrene, dibromostyrene, and the like, and other examples include nitrostyrene, acetylstyrene, methoxystyrene, and the like.

  Furthermore, as (meth) acrylic monomers having no functional group; alkyl acrylates such as methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, and octyl (meth) acrylate , (Meth) acrylic acid cycloalkyl such as cyclohexyl (meth) acrylate, and esters of (meth) acrylic acid and bicyclic alcohols such as isobornyl acrylate. Examples of silicon-containing vinyl monomers include: Examples of vinyl esters include: vinyl propionate, vinyl n-butyrate, vinyl isobutyrate, vinyl caproate, vinyl laurate, vinyl stearate, vinyl benzoate, vinyl salicylate, etc. Is mentioned.

  On the other hand, examples of (+) chargeable polymerizable monomers include, for example, amide group-containing vinyl monomers; methacrylamide, N-methylol methacrylamide, N-methoxyethyl methacrylamide, and the like. Examples of group-containing ethylenically unsaturated compounds include: acrylic acid such as aminoethyl (meth) acrylate, propylaminoethyl (meth) acrylate, dimethylaminoethyl methacrylate, aminopropyl (meth) acrylate, and phenylaminoethyl methacrylate. Alkyl ester derivatives of acid or methacrylic acid, vinylamine derivatives such as N-vinyldiethylamine and N-acetylvinylamine, allylamine derivatives such as allylamine, methacrylamine, N-methylacrylamine and N, N-dimethylacrylamide , Acrylamide derivatives such as acrylamide, N-methylacrylamide, aminostyrenes such as p-aminostyrene, (meth) acrylamides such as N-methylol (meth) acrylamide and diacetone acrylamide, 6-aminohexyl succinimide, etc. Can be mentioned.

  Further, for example, acrylic acid such as aminoethyl (meth) acrylate, propylaminoethyl (meth) acrylate, dimethylaminoethyl methacrylate, aminopropyl (meth) acrylate, phenylaminoethyl methacrylate, cyclohexylaminoethyl methacrylate, etc. Or alkyl ester derivatives of methacrylic acid, vinylamine derivatives such as N-vinyldiethylamine and N-acetylvinylamine, allylamine derivatives such as allylamine, methacrylamine, N-methylacrylamine, N, N-dimethylacrylamide, Acrylamide derivatives such as acrylamide and N-methylacrylamide, aminostyrenes such as N-aminostyrene, and amino group-containing ethylenically unsaturated bonds such as 6-aminohexyl succinimide. Mer can be suitably used as appropriate.

  In the present invention, when such a polymerizable monomer is used in combination with another copolymerizable monomer at the time of polymerization of the polymerizable resin component after protruding as a colored continuous phase in the second microchannel already described above. Depending on the desired chargeability (or electrophoretic property) entrusted to the colored resin fine particles, the chargeable monomer is preferably in the range of 1 to 100% of the total monomer, more preferably 5 in terms of weight. Copolymer particles with a polymerizable monomer in the range of -100%, particularly preferably in the range of 10-100%, can be suitably used to provide the desired bipolar spherical particles.

  In addition, the two-color dipolar spherical particles used as a display medium in the present invention are spherical monodisperse particles having an average particle diameter in a range of 1.0 to 400 μm on a volume basis, preferably 1 It can be suitably adjusted in the range of 1.0 to 200 μm, more preferably 1.0 to 50 μm. In addition, uniform particles with extremely low variation in average particle diameter are appropriately prepared. In the present invention, the homogeneity is expressed as a Cv value, and it is suitably used as dichromatic bipolar spherical particles of monodisperse particles of 20% or less, preferably 5% or less, more preferably 3% or less.

  EXAMPLES The present invention will be further described below with reference to examples, but the present invention is not limited to these examples.

(Reference example)
Disperse 100 parts by weight of methyl methacrylate (MMA), 1 part by weight of dimethylamino methacrylate and 0.3 parts by weight of carbon black (manufactured by Mitsubishi Chemical; MA-100) as a colorant using a sand mill, and an azobis-based initiator. 2 parts by weight of (V-65) was dissolved to obtain a (+) chargeable black continuous phase reactive solution A-1.
Next, as polymerizable monomer 2, 100 parts by weight of methyl methacrylate (MMA), 1 part by weight of MAA, 0.5 part by weight of IBX-A / AA polymer, and titanium white as a colorant (Ishihara Sangyo) 10 parts by weight of R-550) manufactured by using a sand mill, 2 parts by weight of a peroxide-based initiator (perbutyl ND) are dissolved, and a (−) charged white continuous phase reactive solution A- 2.
Next, an aqueous fluid medium B was prepared by dissolving 1 part by weight of 88% saponified polyvinyl alcohol in 100 parts by weight of ion-exchanged water.
Next, using a microchannel manufacturing apparatus disclosed in Japanese Patent Application No. 03-391544, two-colored bipolar spherical particles used in the present invention were prepared. As a two-color continuous continuous fluid of black / white monomer of the above-described black continuous phase reactive solution A-1 and white continuous phase reactive solution A-2 through a Y-shaped channel, From the first microchannel side of the microchannel crossing the mold, the second microchannel is projected into the flow medium B flowing at 25 (ml / hr) with a projecting amount of 5 (ml / hr), and then the inner diameter of the tube While flowing through a 1 mm glass tube, polymerization was carried out by irradiating with ultraviolet rays at 100 mW / cm 2 for 160 seconds using a 100 W high-pressure mercury lamp. By the above operation, bipolar spherical particles having two colors of black / white and black (+) / white (−) charges were prepared. The particle diameter was 150 μm and the CV value was 5%. Note that the first microchannel in the microchannel intersecting the T-shape provided in the manufacturing apparatus is a channel having a square cross section of 0.1 mm in length and 0.1 mm in width, and the second microchannel is 0.1 mm in length. The flow path has a rectangular cross section of 0.2 mm in width.

以上から、封入２色相双極性球状粒子の反転性から評価すると、本発明による画像記録媒体を形成させる対向パネル板（又はパネルシート）は、導電性ではなく、且つ非導電性であるが誘電体部材であって、しかも、少なくとも、同程度の誘電率を有する誘電体部材を対向させてパネル板を構成させることが特徴である。 (Example)
Next, the opposite panel plate as an image recording medium illustrated in FIG. 1 in which the two-color dipolar spherical particles of “black / white” prepared in the reference example are encapsulated as a display medium is various 30 × 60 × A trial production was made by combining 1.5 mm panel plates facing each other. The opposite panel gap was 0.4 mm and 0.6 mm, and two-color (±) bipolar spherical particles of “black / white” were sealed in each air dispersion medium tank. Next, as shown in FIG. 1, external electrodes are provided at both ends of the panel, and the reversibility of the encapsulated two-phase bipolar spherical particles is shown in Table 1 under ON / OFF of the static eliminator. .

From the above, when evaluated from the reversibility of the encapsulated two-color bipolar spherical particles, the opposing panel plate (or panel sheet) on which the image recording medium according to the present invention is formed is not conductive and non-conductive, but a dielectric. It is a feature that the panel plate is constituted by opposing at least dielectric members having the same dielectric constant.

  The present invention is significantly different from flat panel displays such as LCDs and ELDs of conventional notebook personal computers, mobile phones, car navigation systems, etc. in that there is no counter electrode between the display panels. This is a reversal discoloration of the two-colored bipolar spherical particles in this electrodeless display panel placed under an electric field, and it is remarkably both the discoloration display under electrophoresis of the display medium particles encapsulated between the counter electrodes of the PLD of recent years. Different thin, lightweight, and power-saving novel flat panel displays can be provided.

The conceptual diagram explaining the principle of the image display of the image recording medium by this invention is shown. The image forming apparatus according to the present invention shows an example in which the house mark “S” character of Soken Chemical Co., Ltd. is displayed as an image.

Explanation of symbols

1-12 Two-color dipolar spherical particles (display medium)
20, 21 Opposite dielectric panel plate 25 Electron emission tank panel 30 Planar conduction electron emitter 31 Dielectric sheet 32 Image signal electrode (or signal generation circuit)
40 Electron emission tank

Claims (6)

In an image recording medium for displaying a desired colored image by reversing the two-color spherical particles of a display medium encapsulated in an electrodeless panel, which is two electrodeless sandwiched substrates facing each other, under dielectric polarization,
The opposing pair of electrodeless panel plates is a dielectric member having at least an equivalent dielectric constant, and the image display side panel plate is a transparent dielectric member,
The two-color spherical particles of the display medium are bipolar spherical particles having different (±) charging polarities,
The sealed panel for enclosing the bipolar spherical particles comprises an air medium tank,
An image recording medium characterized in that, when displaying an image, the two-color dipolar spherical particles in the electrodeless panel placed under a virtual electric field are inverted in polarization under dielectric polarization to display a colored image. The display medium to be encapsulated is a two-color spherical particle of a black phase and a white phase or a two-color spherical particle of a chromatic hue and a white phase of any one of red, yellow, blue, purple and green, and on a volume basis. The image recording medium according to claim 1, wherein the average particle diameter is 10 to 400 μm. The image recording medium according to claim 1, wherein a gap of 0.1 to 1.5 mm is provided between the opposing electrodeless panels. Using an image recording medium for displaying a desired colored image by reversing the two-color spherical particles of a display medium encapsulated in an electrodeless panel which is a pair of electrodeless sandwiched substrates facing each other under dielectric polarization In the image forming apparatus,
In both electrodeless panels of the opposed pair of image recording media to be used, two-color spherical particles that are display media are encapsulated as bipolar spherical particles that are charged differently (±),
The sealed panel for enclosing the bipolar spherical particles comprises an air medium tank,
The pair of electrodeless panels is composed of a dielectric member having a dielectric constant at least equivalent to that of a nonconductor, and the electrodeless panel plate on the image display side is a transparent dielectric member,
At the time of image formation, on both panel plate surfaces of the pair placed under a virtual electric field, (±) pairs of band electrodes are presented under dielectric polarization,
An image forming apparatus characterized by displaying the desired colored image by inverting the polarization of the two-color dipolar spherical particles encapsulated in the image recording medium. The virtual electric field formed at the time of image display is obtained from the surface conduction electron-emitting device method (SED method), the electrolytic electron-emitting device method (FED method), the cold cathode ray method (MIM method), the plasma discharge method, and the corona discharge method. The image forming apparatus according to claim 4, wherein the image forming apparatus copes with any selected electron emission or ion emission. In the image recording medium, the display medium to be encapsulated includes an infinite number of pixel groups of (±) polar spherical particles having two hues of black and white phases, and displays a desired black and white image. The image forming apparatus according to claim 4, wherein the image forming apparatus is an image forming apparatus.

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