Magnetic-inverting display panel |
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IPC classes for russian patent Magnetic-inverting display panel (RU 2222055):
    
 Device for reproducing three-dimensional images / 2218607
The invention relates to a programmable electro-mechanical devices for displaying three-dimensional information intended for multicolor imaging information, advertising and other messages in the form of bulk text and graphic images
 Magnetic migration display panel / 2152314
The invention relates to a magnetic migration display panel is able to clearly show written magnetically and can then erase the written
 The magnetic blanquerna scoreboard / 2133507
The invention relates to display devices and display information that can be used to create data fields on the display, flat screens and pointers
 Blanquerna the display device information / 2101777
The invention relates to computing and Informatics
 The method of synthesizing images and device for its implementation / 2079897
The invention relates to methods and devices for synthesizing digital visual, textual or graphical information and can be used in various fields of technology
 Ferroelectric liquid crystal display cell / 2092883
The invention relates to electro-optical devices and can be used to create information displays, imaging devices, Svetozarov
 The discovery of the nature of the alleged luminiferous ether / 2049312
The invention relates to physics
 Passive-matrix liquid crystal display and method of controlling this screen / 2206914
The invention relates to a device playback of images and ways of managing these devices
 A liquid-crystal spatial-temporal light modulator for optical information processing / 2134440
The invention relates to the field of optical instrument, in particular for the construction sitopaladi liquid crystal-spatial light modulators for input and processing of optical information, such as holography and intracavity readout image
 Glass filter for welding / 2126548
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The invention relates to a magnetic display panel with the inversion of the material, where the image is formed by inverting the magnetic display material using a magnet and washed by inverting materials magnet on the same side. The technical result - the creation of a flat panel with the inversion of the magnetic material, characterized by increased clarity and erase panel, the image which is formed by inverting the magnetic material. Is achieved in that in the magnetic display panel with the inversion of the material in which the base panel carries a liquid dispersion, characterized by some value of the yield strength and containing as the main components of the magnetic display material in the form of fine particles, which have magnetic poles of opposite signs are painted in different colors by applying a thin metal layer on at least one surface and the second surface in a different colour from thin metal layer on the first surface, a dispersion medium and a thickener, the total surface area of S-poles or surfaces of the N-poles of the magnetic display mother is avna her or exceeds this size is not more than 15 times. Consequently, the magnetic display panel with the inversion of material corresponding to the invention, has good contrast and allows you to create image metal tones or pastel colors. 2 C. and 13 C.p. f-crystals, 6 PL.
The present invention relates to a magnetic display panel with the inversion of the material, where the image is formed by inverting the magnetic display material using a magnet and washed by inverting materials magnet on the same side. More specifically, it relates to a magnetic display panel with the inversion of the material in which the magnetic display material has a magnetic pole of opposite signs, painted in different colors by applying a thin opaque metal layer at least on one surface and the second surface in a different colour from thin metal layer on the first surface.
In known magnetic display panel fine particles of magnetic material dispersed in the dispersion medium. The image is formed due to the migration of the magnetic particles to the surface of the panel, otivational side. For this type of the magnetic display panel characterized by the disadvantage that the apparatus becomes complicated and bulky, because erasing the image must be made on the reverse side of the panel. In addition, the migration of the magnetic particles to the surface of the panel is difficult to erase only the unwanted part of the image.
Further, in patent publication Japan 59-32796/1984, which is incorporated in this application by reference, proposes a magnetic display panel, in which display is realized by inversion showing the magnetic particles. In this panel uses a liquid dispersion of magnetic particles with the residual magnetic moment of from 0.2 to 10 electromagnetic units per gram, and the coercive force of not less than 500 OE; yield strength dispersion is not less than 5.0 N/m2.
This panel, however, had such disadvantages as low contrast and blurred due to the lack of inversion in the formation of the image by inverting the magnetic particles or abrasion.
The purpose of the invention is to create a flat panel with the inversion of the magnetic material, characterized by increased clarity and erase panel, the image which is formed by invertion who ate fluidity and contains, as the core components of the magnetic display material in the form of fine particles having magnetic poles of opposite signs, painted in different colors through the use of a thin opaque metal layer at least on one surface and give the other surface color different from the color of the first surface, and also contains a dispersion medium and a thickener, and rests on the base. The ratio between the internal volume V of the base, the carrier liquid dispersion, and the amount W of the magnetic display material in the form of fine particles is W/V 100 = 1% to 17%. The total area of the surfaces S-poles or surfaces of the N-poles of the magnetic display material in the form of fine particles dispersed in the liquid dispersion of the panel ranges from 60 to 1500% of the area showing the surface of the flat panel.
Preferred embodiments of the invention.
Magnetic display material used in the present invention is a magnetic material with magnetic poles of opposite signs, which has shades of different colors by applying a thin opaque metal layer on one surface is: under the action of a magnetic field, forming the image. For example, when displaying the surface of the panel conducting the S-pole of the writing of the magnet, the surface of the N-poles of the magnetic material located on the surface of the panel so that it becomes the color of the N-poles. When the writing surface of the N-pole of the magnetic pen, magnetic material is inverted and the surface color becomes the S-pole. When the panel is again carried out S-pole magnetic pen, the material is inverted and the image disappears, so you get a panel with the color of the metal and the color of the magnetic material.
In the present invention the ratio between the internal volume V of the base, which houses the liquid dispersion, and the amount W of the magnetic display material in the form of fine particles is W/V100 = 1% to 17%. When this ratio is less than 1%, the image tends to be fuzzy due to the small number of reflecting material, and when the ratio exceeds 17%, it is difficult even inversion, because the particles of material in the inversion interfere with each other. The same volumetric ratio is preferably in the cases when the magnetic display material is contained in cell-cell or capsule. The ratio between but preferably W/V100 = 1% to 17%.
Further, in the present invention, the total surface area of S-pole or N-pole of the magnetic display material to obtain clear images should be from 60 to 1500% of the area showing the surface of the flat panel.
The area of the display surface of the display panel means the area of a flat surface to form the image on the panel containing a liquid dispersion in which the dispersed magnetic display material.
The authors of the present invention have found that one of the reasons for the lack of images in a known indicator panels with inversion of the material is a mismatch between the surface area of S-pole or N-pole of the magnetic material forming the image, and the area of the display panel surface. Another reason is the lack of inversion of the magnetic material.
If the surface area of the S-pole or N-pole of the magnetic material forming the image is less than 60% area of the display panel surface, the color of the image becomes pale and the color difference between the color image and the background color of the substrate is reduced, so that the contrast becomes Hastie too large mutual interference, created by the particles of magnetic material, the inversion is difficult and on the surface occurs non-inverted material, the material turned outward the boundary between the S-pole and N-pole, and so on, so that the image is of mixed color and therefore may not be clear.
Liquid dispersion in which the dispersed magnetic display material must have a certain magnitude of flow and viscosity. A certain amount of fluidity necessary for good dispersion of the magnetic material in a liquid dispersion, good inverting it by magnetic fields, and to prevent the deposition of particles of the material. Viscosity is required in order inverted only that part of the material affected by the magnetic field. More specifically, it is preferable that the liquid dispersion had a yield strength of from 0.15 to 7.5 N/m2and a viscosity of from 3 to 350 MPaC. as a thickener to give the required value of yield strength can be used an inorganic substance, such as "AEROSIL". However, inorganic thickeners have the disadvantage that their viscosity and yield stress of change over time. In contrast, N-acylaminoacyl, this has the advantage that it reports required yield strength, and ductility and yield strength almost do not change with time.
When the liquid dispersion has a yield stress and viscosity that are beyond the ranges of 0.15-7,5 N/m2and 3-350 MPawith, respectively, although the magnitude of the yield stress and viscosity is still acceptable stability save the generated image deteriorates, and due to the fact that the writing magnetic pen material gathers around him, the distribution of the magnetic material becomes nonuniform, so that the color on the periphery of the image formed by the inversion, and the background color of the educated non-inverted magnetic material around the image, have a tendency to change. As a result, the overall image becomes fuzzy, that is, the sharpness deteriorates.
Magnetic display material used in the present invention, has a different color of the surface S-poles and the surface of the N-poles. On one surface must be made with opaque thin metal layer, a specific type or form of which is not significant. However, since it is necessary to form an image of the second magnetic material was obtained by dispersing magnetic particles in the composition, containing the synthetic resin and/or synthetic rubber, color, and cutting or grinding of the layered structure obtained by applying a thin opaque metal layer, or that the magnetic display material was obtained by creating a layered colored sheet with surfaces of different colors and cutting or grinding layered sheet obtained by applying an opaque thin metal layer on at least one surface. The color of the surface on which the opaque thin metal layer is not applied, may be the color of the magnetic material, without colouring. Next, a colored layer may be provided on both surfaces or on one surface, while the thin metal layer applied on one surface.
Alternatively, the surface of the S-poles and N-poles are painted different colors on both surfaces applied a thin transparent metal layer, so that the result is the color of metal tone.
According to research conducted by the authors of the present invention, the magnetic display material is inverted under the action of the magnetic force of the opposite pole, and particles Magno, this material is preferred because not only increases the speed of image formation, but also get a clearer image with a small amount of non-inverted inverted or not enough material.
In particular, in the case when the particles showing magnetic material have a flat or film form, you should pay attention to the fact that when the total surface area of S-pole or N-pole is not less than 1500% of the display area of the panel inversion located piles of material with slip becomes insufficiently expressed, as they interfere with each other.
Most preactically view of the opaque layer on the painted surface of the magnetic particles is opaque thin layer formed by vacuum deposition from the vapor phase.
When the magnetic display material includes an opaque thin metal layer, the image is formed by the combination of metal luster and metallic luster, which provides a high contrast and high image clarity.
Magnetic display material has a tendency to be charged by static electricity due to friction between the particles of the AK as they are inverted stacks, gliding over each other. Being electrostatically charged particles of magnetic material stick together, so their uniform inversion is difficult and part of the material is not inverted. The result may come a case when a clear image using the magnetic display material, painted in various colors cannot be obtained, therefore, the electrostatic charges must be avoided.
As the antistatic agent can be used one or more substances selected from the products of sulfation of polybutene, Quaternary salts of aliphatic alkylammonium reason, polycondensates of aminoethanol-epichlorohydrin, alkylbenzenesulfonates, metal salts alkylsalicylate acids, salts sulfosuccinic acid, salts dialkilsuljfoksidih acid and metal salts of dodecylbenzensulfonate. In particular, the preferred options are the mixture of products of sulfation of polybutene, Quaternary salts of aliphatic alkylammonium reason, polycondensates of aminoethanol-epichlorohydrin and alkylbenzenesulfonic, as well as a mixture of chromium salts alkylsalicylate acid, calcium salt sulfosuccinate acid and polymer.
Design is, you can choose to use the following: base, consisting of two substrates with a space between them, hermetically joined at the perimeter; a base, in which between these two substrates placed the cells in the honeycomb; the Foundation on which the substrate is placed in the capsule; and the like.
Examples of embodiment of the invention.
Below are examples of the present invention, although the invention is not restricted by them.
Example 1 a film of polyethylene terephthalate (PET) with a thickness of 25 μm, is used as the basis, has caused the magnetic paint green with the composition specified in the table. 1; the preparation, application and drying of paint was made in accordance with the procedures set forth below. The result is a green magnetic sheet. In this case, the thickness of the layer of the magnetic paint was 10 μm, and the coating weight was 14.0 g/m2.
(Procedure 1) Resin was dissolved in methyl ethyl ketone (MEK) at concentrations indicated in the table. 1, and to the solution was added to the magnetic powder. Then the resulting mixture was dispersively for 1 hour in razmelchitel.
(Procedure 2) To the dispersion was added to blue paint, yellow paint and white paint production Mikuni Color Ltd., each of which was formed by the dispersion of the pigment in the IEC, in the ratio given is rocedure 3) the Magnetic paint was applied onto the film through the machine for coating at a speed of 30 m/min and dried to obtain the above-mentioned green magnetic sheet.
Then, the obtained sheet was cut into pieces of 100 mm140 mm and napisali on it aluminum with an apparatus for vacuum deposition from the vapor phase production SINKU-RIKQ, INC. (model FA-504); thus, the obtained two-color sheet, colored green from the side of base film and a silver from the opposite side.
In this case, the thickness of the deposited layer was 0.05 μm, and the measurement results two-color sheet after vacuum deposition, weight aluminum evaporated layer together with the layer of paint was 14.1 g/m2.
After this two-tone leaf has demagnetise together with tape-based so that the green side two-color sheet the N-pole, and the silver side is the S pole, and then two-color sheet separated from the film base, so polucilasi thin film. Then a thin film to grind in a small mill (manufactured Kyorisu Riko K. K., sample type SK-M3) and sifted; the result is a magnetic display material of a particle size of from 63 to 212 μm, painted in two colors - green and silver.
Then mixed isoparaffin with a viscosity of 2.0 MPawith the 25oFrom (produced by Esso Chemical Co. Ltd., trade name ISOPAR-the oh Oil Chemical Co. Ltd.) as a thickener in the ratio of 70 weight parts of the first and 30 parts by weight of the latter with the formation of the dispersion. The dispersion was diluted with isoparaffins so that the ratio of isoparaffin to the thickener was 407,92:12,42 weight parts. To the diluted dispersion was added antistatic agent (STADIS-450 production E. LDupont Co. Ltd.) in the amount of 0.15% of the total weight. The result is a dispersion with a yield of 1.76 N/m2and a viscosity of 16 MPawith the 25oC.
The yield strength was determined according to the method of reading the angle of torsion of the rotor during the rotation of dispersion at low speed using a Brookfield viscometer (BL production Tokyo Keiki Co. Ltd.). The second rotor is attached to the specified type viscometer (BL), was used as the actual rotor.
Further, as for the viscosity measurement, its value was measured under conditions of shear stress of 10 PA by using a rheometer with voltage regulation (CSL-100 produced Carri-Med. Ltd.).
Then, to the dispersion was added a magnetic display material, painted in green/silver ratio of 15 parts by weight of magnetic material per 100 parts by weight of the dispersion; the mixture was stirred to obtain a liquid of DIII was 0,84.
After this liquid dispersion was poured into the cells of multi-cell structure with walls made of vinyl chloride resin. Cells of this honeycomb structure was in the form of regular hexagons with a side of 3 mm and a height of 0.8 mm Cells were pasted on one side PVC film thickness of 0.12 mm, Then open the surface of the honeycomb structure coated with PVC film thickness of 0.1 mm, which was glued to the honeycomb structure, so that the liquid dispersion was sealed in cells; therefore, formed a flat panel. In this case, the ratio of the total area of the same color magnetic display material contained in the panel to display the panel surface was 622%. It was calculated as follows.
(1) Displays the surface area of the cell with the millimeter side of the cell is equal to . Therefore, if the cell sites have side 3 mm, .
(2) on the other hand, the total area of the layer is painted in the same color side of the magnetic display material is expressed as follows: Sparticles= volume of cellsthe specific weight of the contained liquidconcept>0,80,84(15:115):(14,1:10,05):0,01005=48,44 mm2.
(3) Accordingly, the ratio of the area of the layer to one surface of the magnetic display material to the site's coverage area is: 48,44:7,794100=622 (%).
The ratio between the internal volume V of one cell and the volume W of the particles of the magnetic display material contained in the cell, was W/V=7,88%.
When the contact S-pole of the magnet from one side of the panel formed the surface of the green color since the magnetic material in the cells colored in two colors, moved up to the front side of the panel and the particles were located partially on top of one another. Then, when the surface of the PVC film wrote the N-pole of the magnet, the green reflecting surface was obtained a clear image of a silver color with a metallic sheen in those places, where he passed the N-pole of the magnet.
Then to erase the image, again conducted the S-pole of the magnet is painted in silver color of the panel, the particles of the material facing the surface of the panel silver side, inverted, and the surface was again green.
Example 2 Liquid dispersion was obtained in the same way as in example 1, except that assigned the local weight of the liquid dispersion in this case was 0,80, while the ratio of the display area of one surface of the magnetic material to the display area of the panel was 89%; the calculation was performed by the method described above. Next, the relationship between the internal volume of one cell and the amount of magnetic material contained in a single cell, was 1.1%.
When the contact S-pole of the magnet from one side of the panel formed the surface of the green color since the magnetic material in the cells colored in two colors, moved up to the front side of the panel and the particles were located partially on top of one another. Then, when the surface of the PVC film wrote the N-pole of the magnet, the green reflecting surface was obtained a clear image of a silver color with a metallic sheen in those places, where he passed the N-pole of the magnet.
Then to erase the image, again conducted the S-pole of the magnet is painted in silver color of the panel, the particles of the material facing the surface of the panel silver side, inverted, and the surface was again green.
Example 3 As in example 1, was prepared green magnetic paint and put it on a PET film with a thickness of 25 μm, which was formed green magnetic sheet, having a thickness in a dry form 9 MK the example 1. The thickness of the green magnetic sheet after the deposition of aluminum was 9,05 μm, and the total weight is 12,72 g/m2.
The liquid dispersion was obtained in the same way as in example 1 except that the ratio in the mixture of the magnetic display material to 100 weight parts of the dispersion was changed to 35 weight parts. The specific weight of the liquid dispersion in this case was 0.89 and the ratio of the display area of one surface of the magnetic material to the display area of the panel was 1458%; the calculation was performed by the method described above. Next, the relationship between the internal volume of one cell and the amount of magnetic material contained in a single cell, was 16,58%.
When the contact S-pole of the magnet from one side of the panel formed the surface of the green color since the magnetic material in the cells colored in two colors, moved up to the front side of the panel and the particles were located partially on top of one another. Then, when the surface of the PVC film wrote the N-pole of the magnet, the green reflecting surface was obtained a clear image of a silver color with a metallic sheen in those places, where he passed the N-pole of the magnet.
Then to erase the image, again conducted the S-pole of the magnet on the painted tiropanis, and the surface was again green.
Example 4 Transparent yellow paint composition specified in the table.2, inflicted on a film of polyethylene terephthalate (PET) with a thickness of 25 μm and dried to obtain a transparent yellow paint layer having a dry thickness of 4 microns.
Then it formed a deposited aluminum layer with a thickness of 0.05 μm by the same method as in example 1, and it caused the same magnetic paint color is green, so that the formed green magnetic layer, having a thickness in a dry form 10 microns and coating weight 13,99 g/m2.
As described above, was obtained two-color leaf gold color on one side and green on the other side. Then the sheet was demagnetise with the formation of the N-pole on the green side and the S-pole on the gold side, the received sheet to grind and sift the received magnetic display material with a particle size in the range from 63 to 212 μm, painted in two colors: green and gold.
Then the magnetic display material, painted in green/gold color, mixed with the dispersion in the ratio of 15 parts by weight of magnetic material per 100 parts by weight of the dispersion; the mixture was stirred to obtain a liquid dispersion in which magnetic displays mA is spersi poured into the cells of multi-cell structure in the form of honeycombs with partitions, made of vinyl chloride resin. Cells of this honeycomb structure was in the form of regular hexagons with a side of 3 mm and a height of 0.8 mm Cells were pasted on one side PVC film thickness of 0.12 mm, Then open the surface of the honeycomb structure coated with PVC film thickness of 0.1 mm, which was glued to the honeycomb structure so that the liquid dispersion was sealed in cells; therefore, formed a flat panel. In this case, the ratio of the total area of the same color magnetic display material contained in the panel to display the panel surface was 466%. It was calculated by the method described above. The ratio between the internal volume of one cell and the volume of particles showing magnetic material contained in the cell, was 8.2 per cent.
When the contact S-pole of the magnet from one side of the panel formed the surface of the green color since the magnetic material in the cells colored in two colors, moved up to the front side of the panel and the particles were located partially on top of one another. Then, when the surface of the PVC film wrote the N-pole of the magnet, the green reflecting surface was obtained a clear image of a Golden color with a metallic the Ohm magnet, painted in Golden color of the panel, particles of the material facing the surface of the gold side, inverted, and the surface was again green.
Example 5 Transparent blue paint composition specified in the table.3, was applied to the PET film with a thickness of 25 μm and dried to obtain a transparent blue paint layer having a dry thickness of 4 microns.
Then on the layer of transparent blue paint formed a deposited aluminum layer with a thickness of 0.05 μm by the same method as in example 1, and the deposited layer has caused the magnetic paint composition specified in the table.4, so that the formed magnetic layer, having a thickness in a dry form 10 microns and coating weight 13,47 g/m2.
Thereafter, the magnetic layer caused a yellow ink composition specified in the table. 5, so that the formed layer of yellow paint, having a thickness in a dry form 18 microns and coating weight 27,4 g/m2; thus, there was obtained a two-color sheet.
As described above, was obtained two-tone sheet metal blue on one side and yellow on the other side. Then the sheet was demagnetise with the formation of the N-pole on the blue side and the S-pole on the yellow side, similarly to example 1, the obtained sheet to grind and sift the received magnetic display the
Then the magnetic display material, painted in metallic blue/yellow, mixed with the dispersion in the ratio of 15 parts by weight of magnetic material per 100 parts by weight of the dispersion; the mixture was stirred to obtain a liquid dispersion in which magnetic display material was evenly dispersed. The specific weight of the liquid dispersion was 0,84,
After this liquid dispersion was poured into the cells of multi-cell structure of the honeycomb, where the cells were made of vinyl chloride resin. Cell cellular structures were in the form of regular hexagons with a side of 3 mm and a height of 0.8 mm Cells were pasted on one side PVC film thickness of 0.12 mm, Then open the surface of the honeycomb structure coated with PVC film thickness of 0.1 mm, which was glued to the honeycomb structure, so that the liquid dispersion was sealed in cells; therefore, formed a flat panel. In this case, the ratio of the total area of the same color magnetic display material contained in the panel to display the panel surface was 186%. It was calculated by the method described above. The ratio between the internal volume of one cell and the volume of magnetic particles tobradex the examples 1 and 2, formed surface blue color with metallic luster.
Then, when the surface of the PVC film wrote the N-pole of the magnet, on a blue surface with metallic luster was obtained a clear image of yellow color in those places, where he passed the N-pole of the magnet.
Then to erase the image, again conducted the S-pole of the magnet on the yellow painted side of the panel, the particles of the material facing the panel surface yellow side, inverted, and the surface was again blue with a metallic sheen.
The example for comparison 1.
As in example 1, was prepared green magnetic paint and put it on a PET film with a thickness of 25 μm, which was formed green magnetic sheet, having a thickness in a dry form 6 microns and coating weight 8,39 g/m2. Then the sheet was napisali aluminum by the method of deposition from the vapor phase as in example 1. The thickness of the green magnetic sheet after the deposition of aluminum was 6,05 μm, and the total weight of 8.53 g/m2.
The liquid dispersion was obtained in the same way as in example 1 except that the ratio in the mixture of the magnetic display material to 100 weight parts of the dispersion was changed to 25 weight parts. The specific weight of the liquid dispersion in this case was 0 which was 1632%; the calculation was performed by the method described above. Next, the relationship between the internal volume of one cell and the amount of magnetic material contained in a single cell, amounted to 12.3%.
When the contact S-pole of the magnet from one side of the panel formed the surface of the green color since the magnetic material in the cells colored in two colors, moved up to the front side of the panel and the particles were located partially on top of one another. Then, when the surface of the PVC film wrote the N-pole of the magnet, the inversion of the particles was insufficient, and a clear image is not obtained even in those places where it is held by a magnet.
The example for comparison 2.
The liquid dispersion was obtained in the same way as in example 5, except that the ratio in the mixture of the magnetic display material to 100 weight parts of the dispersion was changed to 50 weight parts. The specific weight of the liquid dispersion in this case was 0,94, and showing the area of one surface of the magnetic material to the display area of the panel was 529%; the calculation was performed by the method described above. Next, the relationship between the internal volume of one cell and the amount of magnetic material contained in a single cell, amounted to 21.2%.
When the contact S-polataiko, painted in two colors, moved up to the front side of the panel and the particles were located partially on top of one another. Then, when the surface of the PVC film wrote the N-pole of the magnet, the inversion of the particles was insufficient, and a clear image is not obtained even in those places where it is held by a magnet.
The example for comparison 3.
The liquid dispersion was obtained in the same way as in example 1 except that the ratio in the mixture of the magnetic display material to 100 weight parts of the dispersion was changed to 1 weight part. The specific weight of the liquid dispersion in this case was to 0.80, and the display area of one surface of the magnetic material to the display area of the panel was 45%; the calculation was performed by the method described above. Next, the relationship between the internal volume of one cell and the amount of magnetic material contained in a single cell, was 0.6%.
When the contact S-pole of the magnet from one side of the panel formed the surface of the green color since the magnetic material in the cells colored in two colors, moved up to the front side of the panel and the particles were located partially on top of one another. Then, when the surface of the PVC film wrote the N-pole of the magnet, the boundary between the green surface is>In table.6 summarizes the examples and comparative examples and their appreciation has been given.
The evaluation standards In table. 1 shows the evaluation results of the properties of the magnetic display panels with inversion of the material made as described in examples and examples for comparison.
1. Evaluation of properties of formiruemoi image was carried out according to the following standard.
(Procedure) the N-pole and S-pole rubber magnet (the magnet anisotropic rubber, magnetized so that magnetic poles parallel to the surface of the display panel; the length of the magnet 150 mm, height 10 mm, thickness 2 mm) were alternately applied to the surface of the display panel and held them on the surface with a speed of 100 mm per second. The state of inversion of the magnetic material when observed visually.
(Standard evaluation) good: Magnetic material uniformly inverted.
bad: the Particles of magnetic material are mutually interfere with each other, so the inversion is insufficient.
2. Evaluation of a property definition was carried out according to the following standard.
(Procedure) the N-pole and S-pole rubber magnet (the magnet anisotropic rubber, magnetized so that magnetic poles parallel to the surface of the display panel; length MAG is moved, separating it, in the direction perpendicular to the surface of the display panel. While visually observed the surface of the N-poles and S-poles of the magnetic display material that appeared on the surface.
(Standard evaluation) good: the boundary between the surfaces of the N-poles and S-poles of the magnetic display material is clear.
bad: On the border between the surfaces of N-poles and S-poles of the magnetic display material is observed in the mixture of colors, the border is fuzzy.
3. As regards the evaluation of the brightness of bright colors, with this purpose, the display panel manufactured by the methods described in the examples and comparative examples were evaluated by a group of 10 men and 10 women, i.e. only 20 people who were asked to rate their feelings luminous brightness, direction, unevenness, etc.
(Procedure) using a rubber magnet on the entire surface of the display panel turning the material so that its surface with a thin metal layer facing out, and this side was visually observed 20 people selected by random sampling. To assess observers questionnaires with three grades (good, average, bad).
Overall assessment include the evaluation.
(Standard evaluation) : very goodabout: good x: unsuitable The present invention provides a magnetic display material for increased contrast of the written image and having a relatively light color; it allows you to create an image of metallic tones or pastel colors. All layers of the magnetic display material are consistently in all variants of carrying out the invention and in the same sequence as they are listed in the respective claims. The amount of W in paragraph 1 of the claims represents the volume of all the particles of the magnetic display material in the space between the substrates and the base. The amount of W1in paragraph 10 of the claims represents the volume of all the particles of the magnetic display material in a single cell. V1in paragraph 10 of the formula represents the volume of the unit cell. The amount of W2in paragraph 12 of the claims represents the volume of all the particles of the magnetic display material in the capsule. V2in paragraph 12 of the formula represents the volume of the capsule.
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