CN100357993C - Electromagnetic driving multi-color display device, display writing device and method for making same - Google Patents
Electromagnetic driving multi-color display device, display writing device and method for making same Download PDFInfo
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- CN100357993C CN100357993C CNB2004100339962A CN200410033996A CN100357993C CN 100357993 C CN100357993 C CN 100357993C CN B2004100339962 A CNB2004100339962 A CN B2004100339962A CN 200410033996 A CN200410033996 A CN 200410033996A CN 100357993 C CN100357993 C CN 100357993C
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Abstract
The present invention discloses an electromagnetic drive multi-color display device, a display writing device and a manufacturing method thereof. Magnetic field control particles, first magnetic field control particles and second magnetic field control particles are arranged in a containing micro ball in a display layer and can move under the action of an electromagnetic field, and the colors of the various particles are different; the magnetic field control particles need to be chemically modified on surfaces when a display material is prepared, the electric field control particles are retouched in a surface macromolecule way, three-color particle suspension is formed after an electrophoresis particle charge control agent is added, then the dosage of the display material is controlled by a coating instrument, a display layer is coated on a current conducting base material into a block to be solidified, and a layer of protective layer is coated on the display layer finally; an electric field reversing switch is utilized to select forward, backward and broken circuit control electric fields during writing, full of varieties of colors can be presented on the writing display device of the present invention by the control of an electric field pen and a magnetic field pen, and the present invention is suitable for the requirement of large-scale manufacture and production.
Description
Technical field
The present invention relates to a kind of demonstration writing device, by its relate to a kind of can be by the multicolour display device of Electromagnetic Drive, show writing device and manufacture method thereof.
Background technology
Traditional writing device comprises blackboard, notebook etc., and the former causes dust from flying because of needs utilize chalk, and the latter then needs constantly to change paper.For many years, people are devoted to develop the writing device that need not chalk or need not change paper always.Several repeatedly used demonstration writing devices being arranged in the market, as be used for the magnetophoresis device on child's toy, is to utilize magnetic particle and white particles to contrast, and nib has piece magnet, utilizes magnetic field to write, and can produce black pattern on the background of white.Though this device is simple, and several shortcomings are arranged, for example:
(1) is difficult for local modification,, just needs to eliminate whole image, restart if write or paint mistake;
(2) dull coloring and be difficult to write hachure, color only is black-and-white two color usually, though polylith two colour tables can be stitched together to produce color more than three kinds, each independent splicing regions still is limited to double-colored;
(3) whole device is thicker, does not have the light sense of paper;
(4) because of the liquid of need encapsulation suspension magnetic particle and white particles, large-area devices is difficult to make.
United States Patent (USP) 5; 057; 363 have announced that a kind of magnetophoresis of little containing shows writing device; as shown in Figure 1; comprise substrate 1, display layer 2, protective clear layer 3 and the magnet pen 4 of writing usefulness; a plurality of containing microballoons 20 are arranged in display layer 2, contain magnetic particle 201 and non magnetic particle in microballoon 20 inside.
Though this technology can improve the part shortcoming of traditional magnetophoresis device, but as large-area manufacturing, other performances still remain to be improved.
Another kind of writing device utilizes electric field driven, as United States Patent (USP) 5,351,143 and 5,117,297 have announced a kind ofly to be scattered in the writing device that high molecular liquid crystal is a matrix, and this class device can show dichromatism, but contrast is not high, and needs high voltage and extra resistive layer to keep the pattern of writing.
In recent years; electrophoresis showed is because its high-contrast; the image bistability (that is to say; after electric field removes; the resulting image of electric field driven still can keep the quite a long time); obtaining people gradually payes attention to; United States Patent (USP) 6; 473; 072 has described the little containing electrophoresis showed writing device with electric field driven; as shown in Figure 2, it comprises the lower floor's base material 1 that has conductive layer 11; display layer 2; protective seam 3 and the electric field pen 4 ' that is used to write that links to each other with conductive layer 11 contact with display layer 2 when mobile at nib; electric field is moved the charged colour developing particle that contains in the microballoon, and forms dichromatism thereupon.But it will form the writing device of multiple color, then needs quite complicated structure and flow process.
The U.S. Patent application of having announced 20030132908 has proposed the electrophoresis dispersion of multiparticle, utilizes the mobility of different particles under same electric field not, can show different colours by changing electric field amplitude.But this technology implements very difficult, and not only the different field-effect mobilities of particle are difficult to control, and because all there are certain distribution in particle charging and mobility, intersects thereby produce mutually, makes the contrast effect of different colours relatively poor.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of multiple color that shows, display device, demonstration writing device and manufacture method thereof by Electromagnetic Drive, can under electric field and the action of a magnetic field, carry out writing and show of multiple color respectively, and be applicable to the large-scale manufacturing.
The invention provides a kind of Electromagnetic Drive multi-color display device, comprise: have conductive layer base material, be formed at the display layer on the base material, and be formed at protective seam on the display layer, include a plurality of containing microballoons in the described display layer, it is characterized in that comprising in the described containing microballoon: control particle in magnetic field can be moved under the action of a magnetic field; The first electric field controls particle can be moved under electric field action; Move opposite with the described first electric field controls particle direction can take place in the second electric field controls particle under described electric field action; Wherein, vary in color varying in color between the first electric field controls particle in the same containing microballoon and the second electric field controls particle between described magnetic field control particle and the electric field controls particle.
The present invention and then a kind of manufacture method of Electromagnetic Drive multi-color display device is provided is characterized in that comprising the steps:
Magnetic field control particle and the first electric field controls particle and the second electric field controls particle that gets colors different;
Particle is controlled in magnetic field carried out surface chemical modification;
It is macromolecule modified that the first electric field controls particle and the second electric field controls particle are carried out the surface;
With described magnetic field control particle and first and second electric field controls mix particles, and add the electrophoresis particle charge control agent, form three colored particle suspending liquid;
Utilize the containing microballoon of the described suspending liquid of a plurality of containings of described suspension preparation, and it is scattered in forms display material in the dispersion liquid;
According to the design volume of display layer, utilize the coating instrument to control the consumption of described display material, the coating display layer becomes piece and solidifies on conductive base;
On display layer, be coated with layer protective layer.
The present invention also provides a kind of Electromagnetic Drive polychrome to write display device, comprise and write liner plate, display device, circuit control device, wherein display device comprises the base material that has conductive layer, is formed at the display layer on the base material, and be formed at protective seam on the display layer, described base material conductive layer links to each other with described circuit control device, include a plurality of containing microballoons in the described display layer, it is characterized in that described writing device also comprises: the electric field pen links to each other with circuit control device by electrical wiring; The magnetic field pen; Described circuit control device comprises the electric field reversing switch, has forward, the reverse and control of opening circuit; Comprise in the described containing microballoon: control particle in magnetic field can be moved under the action of a magnetic field; The first electric field controls particle can be moved under electric field action; Move opposite with the described first electric field controls particle direction can take place in the second electric field controls particle under described electric field action; Wherein, vary in color varying in color between the first electric field controls particle in the same containing microballoon and the second electric field controls particle between described magnetic field control particle and the electric field controls particle.
Display device provided by the invention can be carried out the demonstration of multiple color under the control in electric field and magnetic field, utilize the combination of the continuous demonstration block of polylith, can present colourful color; The manufacture method of display device provided by the present invention not only makes magnetic field control particle well mix with the electric field controls particle, and is suitable for the extensive requirement of producing of making, and produces the flexible thin display device; Demonstration writing device provided by the invention can switch the electric field commutation easily, and the input of writing of electric field pen and magnetic field pen is provided simultaneously, under the jointly controlling of lettering pen and electric field switching, provides the demonstration of writing of multiple color.In a word, utilize the present invention, can produce and to show multiple color, utilize the flexible thin of electric field and field drives to show writing device.
Description of drawings
Fig. 1 is that existing magnetophoresis shows the writing device synoptic diagram;
Fig. 2 is existing electrophoresis showed writing device synoptic diagram;
Fig. 3 shows the writing device structural representation for the Electromagnetic Drive that the present invention carried;
Fig. 4 is the display device manufacturing method process flow diagram that the present invention carried;
Fig. 5 A-B is the display layer synoptic diagram that the present invention carried;
Fig. 6 A-B is the vertical view and the sectional view of the flexible thin electrophoretic display apparatus that the present invention carried;
Fig. 7 shows the writing device schematic top plan view for the Electromagnetic Drive that the present invention carried;
Fig. 8 carries the control circuit synoptic diagram that contains the electric field reversing switch for the present invention;
Fig. 9 A-D is carried by the present invention writes the procedure for displaying synoptic diagram;
Figure 10 A-D is for using the writing process synoptic diagram of the first embodiment of the present invention;
Figure 11 is the electric field that the has square synoptic diagram that the present invention carried;
Figure 12 A-B is vertical view and the sectional view that shows the block display device more than the present invention puies forward;
Figure 13 is for using the writing process synoptic diagram of the second embodiment of the present invention.
Embodiment
The present invention combines electric field and field drives, proposes a kind of flexible thin display device and demonstration writing device and manufacture method thereof that shows multiple color.
As shown in Figure 3, demonstration writing device structural representation provided by the present invention comprises the base material 1, display layer 2, protective clear layer 3, magnetic field pen 4, the electric field pen 4 ' that have conductive layer 11, and circuit control device 5.In display layer 2, containing microballoon 20 contains the dielectric dispersion liquid with three kinds of different colours particles, and wherein two kinds of color particles 202,203 are by the electric field controls colour developing, and another kind of color particle 201 is controlled by magnetic field.
Wherein, upper strata protective seam 3, lower floor have a plurality of containing microballoons 20 in the base material 1 of conductive layer 11 and display layer 2, the display layer 2, contain magnetic field control particle 201, electric field controls particle 202,203 in the microballoon, have constituted the display device that the present invention put forward jointly.
Wherein conductive layer 11 is used for forming electric field with after the electric field pen links to each other; Base material 1 can carry display material; protective seam 3 is used to protect display layer 2 to avoid infringements such as scuffing; in the containing microballoon in display layer 2; have three colored particles; directed moving can take place in magnetic field control particle 201 under the action of a magnetic field; directed moving can take place in the first electric field controls particle 202 under electric field action, move opposite with the described first electric field controls particle, 202 directions can take place under described electric field action the second electric field controls particle 203.
In order to guarantee that color can distinguish, wherein, vary in color varying in color between the first electric field controls particle 202 in the same containing microballoon and the second electric field controls particle 203 between described magnetic field control particle 201 and the electric field controls particle 202,203.
Described display layer both can be a continuous viewing area, also can be the continuous separately viewing area of polylith.Generally in use, the component of the containing microballoon in same viewing area is identical, to present three kinds of colors, containing microballoon between the different viewing areas can be different, also can be that part is identical, for example, the magnetic field control particle color in the containing microballoon in two viewing areas be identical, but the color difference of first, second electric field controls particle so also can play the effect of distinguishing color.Certainly, the selection of actual color particle can be selected according to the use needs of reality, as long as can play the effect of differentiation.
The present invention and then the manufacture method of an a kind of Electromagnetic Drive multi-color display device is provided, its process flow diagram as shown in Figure 4, magnetic field control particle and the first electric field controls particle and the second electric field controls particle (step 401) that at first gets colors different; Then magnetic field is controlled particle and carried out surface chemical modification (step 402); The first electric field controls particle and the second electric field controls particle are carried out surface macromolecule modified (step 403); With described magnetic field control particle and first and second electric field controls mix particles, and add the electrophoresis particle charge control agent, form three colored particle suspending liquid (step 404); Utilize the containing microballoon of the described suspending liquid of a plurality of containings of described suspension preparation, and it is scattered in forms display material (step 405) in the dispersion liquid; According to the design volume of display layer, utilize the coating instrument to control the consumption of described display material, the coating display layer becomes piece and solidifies (step 406) on conductive base; On display layer, be coated with layer protective layer (step 407).
Though the magnetophoresis device all has relevant prior art with electrophoretic apparatus, the present invention is not their simple stacks.In dielectric dispersion liquid of the present invention, by electric field controls colour developing be dielectric particle, and what control by magnetic field is metal conductive particles.More specifically get on very well, this metal conductive particles is a micron order metal carbonyl fine powder.In order to form stable dielectric dispersion liquid, the invention allows for the chemical modification method of metal carbonyl fine powder:
Be applicable to that metal carbonyl fine powder of the present invention can comprise ferromagnetic materials such as micron order iron powder, cobalt powder, nickel powder.Because its electric conductivity and high-purity, with after electrophoresis dispersion mixes, the surface is difficult for charged, and their mobilities under electric field are extremely low like this.When electric field driven, they can not intersect with the electrophoresis dielectric particle develops the color, and like this, the demonstration of electrophoresis dielectric particle color just can not be interfered.
Show in the dispersion liquid if the metal carbonyl fine powder is directly used in, attract each other between particle and the particle, may condense agglomerating and cause the instability that shows dispersion liquid, thereby influence display effect and contrast.By surface chemical modification step of the present invention, the form on metal carbonyl fine powder surface with covalent bond is implanted the macromolecular chain that is dissolved in the dispersion liquid solvent, because the mutual repulsion between the macromolecular chain reduces attracting each other of metal carbonyl fine powder.
The specific embodiment of chemical modification method can adopt United States Patent (USP) 5,035, and that announces for 803 (Cohen etc., on July 30th, 1991) utilizes the vinyl silane surface treatment, utilizes the method for free radical reaction growing polymer chain then.According to this principle, can prepare the required iron powder dispersion liquid of present embodiment.Instantiation is as follows:
In heatable mixer, add that 5.0 grams screened, the metal carbonyl fine powder (German BASF AG) of particle diameter＜1 micron, 15.0 gram hydrocarbon cosolvent Isopar G (U.S. ExxonMobil company), 0.01 the titanate KR133DS (U.S. Kenrich company) of gram g band methacrylic acid functional group mixes under the stirring rate of 500rpm and carried out surface treatment in 30 minutes.Under nitrogen environment and condensation reflux unit, in said mixture, add 3.0 gram lauryl alcohol methacrylates (U.S. Aldrich company), 26.5 gram hydrocarbon cosolvent IsoparG (U.S. ExxonMobil company), be heated to 70 degree, slowly add azoisobutyronitrile (U.S. Aldrich company) 0.02 gram (being dissolved in 0.5 milliliter of toluene in advance), reacted 8 hours, and just can obtain the iron powder dispersion liquid of 10% (weight ratio).Add 0.1% (weight ratio) macromolecule dispersing agent LP-1 (U.S. Uniqema company) in above-mentioned dispersion liquid and can obtain more stable iron powder dispersion liquid.
Electrophoresis showed is invented by Ota as far back as the seventies, utilizes coloured charged particle to move under electric field and develops the color.United States Patent (USP) 6,194,488 disclose the macromolecule modified chemical method in pigment particles surface that is used for electrophoresis showed, this method is suitable for inorganic and organic pigment particles, comprise titania, zinc oxide, silicon dioxide, carbon black, iron oxide, organic yellow uitramarine (Aiarylide yellow, Arylideyellow, Hansa yellow Benzidine yellow), organic orange pigment (Periinone Orange, Diarylide Orange), organic blue pigment (Ultramarine blue, Indanthrone blue), organic red pigment (Anthraquinoid red, Perylene red) etc.
Among the present invention,, therefore, select two kinds of electrophoresis particles (non-black) in addition, just can form three colored particles of the present invention because the metal carbonyl fine powder is Dark grey or black.In this example, use above-mentioned disclosed patented method, adopt white titania TiO
2R706 (U.S. DuPont company) and organic blue pigment 260-6101 (U.S. SunChemical company) are raw material, the preparation electrophoresis dispersion.The processing procedure of organic blue pigment dispersion liquid is as follows: blue pigment is at first through 0.06% (weight ratio) azo class 4,4 '-azobis (4-cyanovaleric acid) chain initiator hybrid processing (U.S. Aldrich company); Adding following component at the high molecular weight reactive still then: the blue pigment after 20 gram chain initiators are handled, 50 gram penta fluoro polystyrene monomers (U.S. Aldrich company), 330 gram Isopar G (U.S. ExxonMobil company), under stirring condition, be heated to 60 degree reactions 7 hours, can be made into the blue stable dispersions of 5% (weight ratio).
Titania TiO2 (U.S. DuPont company) is selected for use with the quadrat method processing, can make the stable dispersions of 5% (weight ratio).In order to obtain stronger white in final writing device, above-mentioned white dispersion liquid is further concentrated by centrifugal, remove the solvent of 80% (weight ratio) after, obtain the white dispersion liquid of 25% (weight ratio).
Iron powder, titania and organic blue pigment dispersion liquid are mixed with 1: 1: 1 (weight ratio), add electrophoresis particle charge control agent 0.1% (weight ratio) OLOA371 (U.S. Chevron company) and 0.2% (weight ratio) DMRCobalt (German Creanova company), titania and organic blue pigment are distinguished electronegative and positive charge in dispersion liquid like this.Under electric field action, titania moves towards the forward electrode like this, and organic blue pigment moves towards the negative sense electrode, and the iron powder of low mobility only just moves under magnetic field.
Compared with prior art, the present invention also proposes a kind of method of being convenient to large-scale production.Particularly, utilize the method for coating to produce display layer and protective seam, production procedure is easy like this, can also reduce the thickness of whole writing device.Protective clear layer contains the inorganic nano material close with the polymer base material refractive index, with the anti-scratch ability of raising protective seam, thus the serviceable life of improving writing device.
For the structure of display layer 2, as shown in Figure 5.Utilization Jap.P. 2551783 disclosed multiple little containing electrophoretic display technology (phase splitting, surface aggregate, surface deposition etc.), can prepare the microballoon 20 that contains three kinds of color particle suspensions, be scattered in then in macromolecule 13 liquid or the dispersion liquid, utilize coating accurate coating of instrument or printing.Electrophoretic display materials layer 2 thickness can pass through the microballoon size, and coating formula and coating print speed printing speed etc. is controlled.The coating process of commercial usefulness comprises dipping formula (dip coating), scraper type (knife or blade coating), slit die formula (slot-die coating), drum-type (rollcoating) etc., the coating wet-film thickness is usually between the 1-500 micron, concerning electrophoretic display panel was used, material display layer thickness was better at the 2-100 micron, and the 5-50 micron is better.Microballoon can be individual layer in the distribution of material display layer closely to be arranged, shown in Fig. 5 A; Or multilayer closely arranges, shown in Fig. 5 B.
Prescription for above-mentioned three particle dispersions, this example adopts United States Patent (USP) 5,057, the little containing method of 363 gelatin-gum arabic, make size microballoon between the 10-100 micron, be scattered in polyvinyl alcohol (PVA)-polypropylene ester water-soluble binder, it is 50 microns multicolor displaying layer that utilization scraper type coating process makes the multilayer back thickness of closely arranging, be heating and curing.
In the production of upper strata display material, according to the size of required display layer design volume, accurately control the consumption of display material by being coated with instrument, on compliant conductive base material 1, be coated with 2 one-tenth pieces of display layer and curing continuously, be coated with layer protective layer 3 then continuously on display layer 2; Fig. 6 A and Fig. 6 B are respectively the vertical view and the sectional views of flexible thin electrophoretic display apparatus.Here, compliant conductive base material 1 comprises sheet metal or is coated with the plastic sheeting of conductive layer that as the stainless steel thin slice SUStype304 series of Nippon Steel company, the aluminum plated PET film Liumalloy of CPFilms company etc., thickness range is the 50-500 micron.
Nano composite material protective seam of the present invention can be ultraviolet photocureable material.In 95.0 gram UVHC8558 (U.S. GE company), add 0.5 gram coupling agent NZ39 (U.S. Kenrich petrochemistry company) and 5.0 and restrain nano silicon Aerosil R812S (German Degussa company), utilize the common stirring machine of commercial usefulness to mix.Protective seam can use multiple coating process, as scraper type (knife orblade coating), slit die formula (slot-die coating), drum-type (roll coating) etc.To magnetoelectricity swimming display application, usually between the 5-100 micron, present embodiment protective seam coating wet-film thickness is 10 microns at the protective seam coating wet-film thickness on the display layer.After the coating, utilize and commercially to come curing protective coat with the uviol lamp (U.S. Fusion Systems company) that has the 250-360nm ultraviolet source, can launch 750mJ/em2.Above-mentioned steps can repeat and obtain thicker protective seam.
Nano composite material protective seam of the present invention can also be a thermosetting material.In 100 gram silicon resin solution SHC5020 (U.S. GE company), add 0.2 gram coupling agent LICA44 (U.S. Kenrich petrochemistry company) and 2 and restrain nano silicon Aerosil R972 (German Degussa company), utilize the common stirring machine of commercial usefulness to mix.Utilization scraper type rubbing method, layer coating wet-film thickness that be protected is 20 microns.Heat curing condition after the coating is room temperature 10 minutes, adds 60 minutes under 90 degree conditions then.
The flexible thin magnetoelectricity swimming display device schematic top plan view that Fig. 7 is carried by the present invention; the liner plate 100 that comprises writing device; flexible thin electrophoretic display apparatus 200 comprises flexible parent metal 1, display layer 2 and protective seam 3 (among the figure for showing), circuit control device 5; electric field reversing switch control knob 51 (comprise positive pole, negative pole and open circuit); the on line 45 that connects electric field pen 4 ' and circuit control device, electric field pen 4 ', electric field nib 41; magnetic field pen 4, magnetic field nib 42 (containing magnet).
The liner plate 100 of writing device can utilize existing material such as plank on numerous markets, organic plastic plate (comprising polyvinylchloride, polyester PET, polycarbonate etc.).Electric field pen 4 ' shape such as conventional pen, its end links to each other with the outlet terminal of circuit control device 5 by circuit on line 45, and an end links to each other with conducting channel nib 41.Circuit nib 41 is the flexibility material, as contains the soft scum rubber (U.S. Conductive Plastics company) of conductive carbon black or graphite.The top of magnetic field pen 4 contains permanent magnet material; multiple material as U.S. GROUP ARNOLD company; comprise ferrite class (ferrite); terres rares (rare earth) etc.; though the magnetic field pen write the protective seam that can contact display device; desirable magnetic field nib still is the flexibility material, as polyfoam or rubber.
Wherein, the circuit 5 of electric field reversing switch control can followingly design, and sees shown in Figure 8, comprise: power supply 52, current-limiting resistance 53, electric field reversing switch 51, circuit outlet terminal 54 (linking to each other) with conductive base 11, circuit outlet terminal 55 (linking to each other) with the on line 45 of electric field pen.
The power supply 52 here can be battery or power transformer unit, and voltage range is the 5-100 volt.The purpose of current-limiting resistance 53 is in order to control the electric current of writing device, thereby the letter of guarantee write device is safe in utilization, and its resistance range is 100K Ω-100M Ω, preferred 1M Ω-20M Ω.
As shown in Figure 9, the magnetoelectricity swimming shows that the concrete operations of writing device are as follows:
Fig. 9 A, do not having under the electric field situation, three colored particles mix mutually in the display layer, and display layer is color mixture;
Fig. 9 B, by selecting electric field reversing switch 51, make electric field pen 4 ' for anodal, base material conductive layer 11 connects negative pole, when the electric field pen touches protective seam 3, electronegative white particles 203 is moved on protective seam, and the blue particles of positively charged 202 moves down towards base material, and the place that the electric field pen is write is white in color;
Fig. 9 C, by selecting electric field reversing switch 51, make electric field pen 4 ' be negative pole, base material conductive layer 11 connects positive pole, when the electric field pen touches protective seam 3, the blue particles 202 of positively charged is moved on protective seam, and electronegative white particles 203 moves down towards base material, and it is blue that the place that the electric field pen is write is;
Fig. 9 D, by selecting electric field reversing switch 51 to opening circuit, when magnetic field pen 4 near to or in contact with to protective seam 3, black iron powder particle 201 moves on protective seam 3, the place that the electric field pen is write is black.
As shown in figure 10, write embodiment for using of the present invention first:
Figure 10 A to B, by selecting the electric field reversing switch to opening circuit, do to eliminate apparatus with magnet piece 42 ', as " blackboard eraser ", when it near to or in contact with to the upper strata (protective seam 3) of whole display layer 2 time, whole display layer becomes black 26;
Figure 10 C, by selecting the electric field reversing switch, make the electric field pen for anodal, when the electric field pen touches protective seam, the place that the electric field pen is write is white in color 27;
Figure 10 D, by selecting electric field reversing switch 4, making the electric field pen is negative pole, when the electric field pen touches protective seam, the place that the electric field pen is write is blue 28.
The present invention also provides a kind of electric field pen of altering and writing one, and as shown in figure 11, electric field pen 4 ' can have nib 41 and square 43 simultaneously.Square 43 can be coated with and use instead, as " erasing rubber ", also can be directly used in the picture square.Nib 41 and square 43 all are conductive materials, as contain the soft scum rubber of conductive carbon black or graphite.
The following describes application of the present invention second and write embodiment, as shown in figure 12, be respectively the vertical view and the sectional view of many display layers piece display device.In the production of upper strata display material, on compliant conductive base material 1, can be coated with different display layer piece 2A and 2B, in this embodiment, display layer 2A contains black iron powder, white titania and organic blue pigment, display layer 2B contains organic orange pigment DCC7170 (Canadian Dominion Color company) of black iron powder, electronegative inorganic chromium yellow pigment DCC1003 (Canadian Dominion Color company) and positively charged, and the surface chemical modification of each particle as previously mentioned.After display layer solidifies, be coated with layer protective layer 3 then continuously on display layer 2A and 2B.For determining of number of blocks and color separately, can select according to actual needs.
When writing or paint, at first,, do to eliminate apparatus with magnet piece 42 ' by selecting electric field reversing switch 51 to opening circuit, make whole display layer become black 26.
By selecting electric field reversing switch 51, make electric field pen 4 ' for anodal, at top display layer 2A, make display layer be white in color 27 with an electric field square 43, at bottom display layer 2B, make the bottom display layer be yellow 29 with an electric field square 43;
By selecting electric field reversing switch 51, make electric field pen 4 ' be negative pole, at top display layer 2A, write blueness 28, at bottom display layer 2B, with the orange pattern 30 of electric field stroke with the electric field pen;
At last, by selecting electric field reversing switch 51 to opening circuit, write respectively and paint 31 with the magnetic field pen.
Claims (22)
1, a kind of Electromagnetic Drive multi-color display device comprises: have conductive layer base material, be formed at the display layer on the base material, and be formed at the protective seam on the display layer, include a plurality of containing microballoons in the described display layer, it is characterized in that:
Comprise in the described containing microballoon:
Control particle in magnetic field can be moved under the action of a magnetic field;
The first electric field controls particle can be moved under electric field action;
Move opposite with the described first electric field controls particle direction can take place in the second electric field controls particle under described electric field action;
Wherein, vary in color varying in color between the first electric field controls particle in the same containing microballoon and the second electric field controls particle between described magnetic field control particle and the electric field controls particle.
2, device as claimed in claim 1 is characterized in that described electric field controls particle is a dielectric particle, and described magnetic field control particle is a metal conductive particles.
3, device as claimed in claim 2 is characterized in that described metal conductive particles is the metal carbonyl fine powder.
4, device as claimed in claim 1; it is characterized in that described protective seam is the organic composite material that contains inorganic nano material, each components by weight consists of: macromolecular material 50-95%, nano particle 2-45%; coupling agent 0.1-5%, high molecular weight reactive chain initiator 0-5%.
5, device as claimed in claim 4 is characterized in that described macromolecular material can be monomer, oligomer, polymkeric substance, or their potpourri, comprises polyester, polyurethane, silicones, acrylate and epoxy resin;
The selection of nano material comprises silicon dioxide, titania, silicate, zinc oxide, and its grain size should be lower than 300 nanometers;
Coupling agent comprises silane, titanate and zirconate.
6, device as claimed in claim 4 is characterized in that described macromolecular material can be monomer, oligomer, polymkeric substance, or their potpourri, comprises polyester, polyurethane, silicones, acrylate and epoxy resin;
The selection of nano material comprises silicon dioxide, titania, silicate, zinc oxide, and its grain size should be lower than the 1-50 nanometer;
Coupling agent comprises silane, titanate and zirconate.
7, device as claimed in claim 4 is characterized in that described macromolecular material can be monomer, oligomer, polymkeric substance, or their potpourri, comprises polyester, polyurethane, silicones, acrylate and epoxy resin;
The selection of nano material comprises silicon dioxide, titania, silicate, zinc oxide, and its grain size should be lower than the 1-20 nanometer;
Coupling agent comprises silane, titanate and zirconate.
8, device as claimed in claim 1 is characterized in that described display layer is a continuous viewing area.
9, device as claimed in claim 1 is characterized in that described display layer is the continuous separately viewing area of polylith.
10, a kind of manufacture method of Electromagnetic Drive multi-color display device is characterized in that comprising the steps:
Magnetic field control particle and the first electric field controls particle and the second electric field controls particle that gets colors different;
Particle is controlled in magnetic field carried out surface chemical modification;
It is macromolecule modified that the first electric field controls particle and the second electric field controls particle are carried out the surface;
With described magnetic field control particle and first and second electric field controls mix particles, and add the electrophoresis particle charge control agent, form three colored particle suspending liquid;
Utilize the containing microballoon of the described suspending liquid of a plurality of containings of described suspension preparation, and it is scattered in forms display material in the dispersion liquid;
According to the design volume of display layer, utilize the coating instrument to control the consumption of described display material, the coating display layer becomes piece and solidifies on conductive base;
On display layer, be coated with layer protective layer.
11, method as claimed in claim 10 is characterized in that described electric field controls particle is a dielectric particle, and described magnetic field control particle is a metal conductive particles.
12, method as claimed in claim 10 is characterized in that described magnetic field control particle is the metal carbonyl fine powder.
13, method as claimed in claim 10 is characterized in that the step of described surface chemical modification, can utilize the mode of free radical reaction growing polymer chain to carry out, so that the particle-stabilised dielectric solvent that is scattered in of described magnetic field control.
14, method as claimed in claim 10, it is multiple to it is characterized in that described display material can have, and each all is made of the containing microballoon of described containing three colored particle suspending liquid, the varying in color of the electric field controls particle between each described suspending liquid.
15, method as claimed in claim 10 is characterized in that the described step that is coated with display layer on conductive base, is to utilize to be coated with continuously a viewing area with a kind of described display material.
16, method as claimed in claim 10 is characterized in that the described step that is coated with display layer on conductive base, is to utilize the coating continuously separately in the polylith viewing area of multiple described display material.
17, a kind of Electromagnetic Drive polychrome is write display device; comprise and write liner plate, display device, circuit control device; wherein display device comprises the base material that has conductive layer, is formed at the display layer on the base material; and be formed at protective seam on the display layer; described base material conductive layer links to each other with described circuit control device; include a plurality of containing microballoons in the described display layer, it is characterized in that:
Described writing device also comprises:
The electric field pen links to each other with circuit control device by electrical wiring;
The magnetic field pen;
Described circuit control device comprises the electric field reversing switch, has forward, the reverse and control of opening circuit;
Comprise in the described containing microballoon:
Control particle in magnetic field can be moved under the action of a magnetic field;
The first electric field controls particle can be moved under electric field action;
Move opposite with the described first electric field controls particle direction can take place in the second electric field controls particle under described electric field action;
Wherein, vary in color varying in color between the first electric field controls particle in the same containing microballoon and the second electric field controls particle between described magnetic field control particle and the electric field controls particle.
18, device as claimed in claim 17 is characterized in that described electric field controls particle is a dielectric particle, and described magnetic field control particle is a metal conductive particles.
19, device as claimed in claim 18 is characterized in that described metal conductive particles is the metal carbonyl fine powder.
20, device as claimed in claim 17 is characterized in that described electric field pen comprises the electric field nib, is made of the flexible conductive material; The magnetic field pen comprises the magnetic field nib, contains magnet in the nib of magnetic field.
21, device as claimed in claim 17 is characterized in that described electric field pen one end has the square that is made of soft conductive material.
22, device as claimed in claim 17; it is characterized in that described protective seam is the organic composite material that contains inorganic nano material, each components by weight consists of: macromolecular material 50-95%, nano particle 2-45%; coupling agent 0.1-5%, high molecular weight reactive chain initiator 0-5%.
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| CN101271239B (en) * | 2007-03-23 | 2011-09-28 | 广州奥翼电子科技有限公司 | Microsphere containing electrophoretic display device and manufacturing method thereof |
| CN103087259B (en) * | 2013-01-22 | 2014-12-10 | 京东方科技集团股份有限公司 | Three-color particles, microfluid device for preparing three-color particles, preparation method and electronic paper |
| CN104773013B (en) * | 2014-02-19 | 2016-07-06 | 牡丹江师范学院 | Electronic teaching board system |
| CN104408976B (en) * | 2014-11-26 | 2017-12-01 | 江汉大学 | A kind of electronic blackboard and imaging pen |
| CN107209434B (en) * | 2015-02-18 | 2020-10-09 | 伊英克公司 | Addressable electro-optic display |
| CN107045244A (en) * | 2017-02-08 | 2017-08-15 | 蔡思强 | A kind of liquid display screen for the particle that developed the color by polarity in electromagnetic field control screen |
| CN106864111B (en) * | 2017-02-14 | 2018-08-03 | 江苏秀强玻璃工艺股份有限公司 | A kind of glass board and preparation method thereof |
| KR102610376B1 (en) * | 2018-12-21 | 2023-12-05 | 이 잉크 코포레이션 | Sub-threshold addressing and erasure in magnetoelectrophoretic writing media. |
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| CN1459473A (en) * | 2002-05-17 | 2003-12-03 | 希毕克斯影像有限公司 | IV phthalocyanine and naphthalene phthalocyanine dye for electrophoresis, magnetophoresis or electromagneto phoresis display device |
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| US5057363A (en) * | 1989-12-27 | 1991-10-15 | Japan Capsular Products Inc. | Magnetic display system |
| US5117297A (en) * | 1990-08-09 | 1992-05-26 | Western Publishing Company | Liquid crystal writing slate with DC imaging system |
| US5351143A (en) * | 1992-02-07 | 1994-09-27 | Kabushiki Kaisha Pilot | Hand-writable polymer dispersed liquid crystal board set with high resistance layer of crosslinking polymer adjacent conductive layer |
| CN1272665A (en) * | 1998-10-16 | 2000-11-08 | Tdk株式会社 | Magnetic electrophoretic display device and its manufacturing method |
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Denomination of invention: Electromagnetic driving multi-color display device, display writing device and method for making same Effective date of registration: 20130603 Granted publication date: 20071226 Pledgee: Zhang Changhong Pledgor: GUANGZHOU OED TECHNOLOGIES Co.,Ltd. Registration number: 2013990000336 |
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Address after: 511458 Guangdong Province, Nansha Development Zone, Jinling Road, No. 425, room 93, No. Patentee after: GUANGZHOU OED TECHNOLOGIES, Inc. Address before: 511458 Guangdong Province, Nansha Development Zone, Jinling Road, No. 425, room 93, No. Patentee before: GUANGZHOU OED TECHNOLOGIES Co.,Ltd. |
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Effective date of registration: 20180309 Address after: 511458, Guangdong, Guangzhou province Nansha District Industrial Zone West Wei Road, No. 3, B building on the first floor, the two floor Co-patentee after: Guangzhou olefin first wood technology Co.,Ltd. Patentee after: GUANGZHOU OED TECHNOLOGIES, Inc. Co-patentee after: GUANGZHOU OED TECHNOLOGIES Co.,Ltd. Address before: 511458 Guangdong Province, Nansha Development Zone, Jinling Road, No. 425, room 93, No. Patentee before: GUANGZHOU OED TECHNOLOGIES, Inc. |
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