WO2001050188A1 - Panneau d'affichage a inversion de substance magnetique - Google Patents

Panneau d'affichage a inversion de substance magnetique Download PDF

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Publication number
WO2001050188A1
WO2001050188A1 PCT/JP2000/009429 JP0009429W WO0150188A1 WO 2001050188 A1 WO2001050188 A1 WO 2001050188A1 JP 0009429 W JP0009429 W JP 0009429W WO 0150188 A1 WO0150188 A1 WO 0150188A1
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WO
WIPO (PCT)
Prior art keywords
magnetic
display
display panel
color
magnetic flux
Prior art date
Application number
PCT/JP2000/009429
Other languages
English (en)
Japanese (ja)
Inventor
Takeo Yokoyama
Ineo Ota
Masahiko Ikeda
Hideki Misawa
Original Assignee
Kabushiki Kaisha Pilot
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kabushiki Kaisha Pilot filed Critical Kabushiki Kaisha Pilot
Priority to JP2001550485A priority Critical patent/JPWO2001050188A1/ja
Priority to AU22311/01A priority patent/AU2231101A/en
Publication of WO2001050188A1 publication Critical patent/WO2001050188A1/fr

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/37—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being movable elements
    • G09F9/375—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being movable elements the position of the elements being controlled by the application of a magnetic field

Definitions

  • the present invention relates to a magnetic field in which a display is formed by inverting a magnetic display using a display magnet and the display is erased from the same surface by using an erasing magnet to erase the display.
  • the present invention relates to a magnetic material inversion display panel in which a display is inverted to erase a display.
  • a display panel using magnetism is described in Japanese Utility Model Publication No. 58-55406, Japanese Patent Publication No. 62-535359, and the like filed by the present applicant. These publications describe a magnetophoretic display panel.
  • the magnetophoretic display panel seals between two substrates a plastic dispersion liquid composed of magnetic particles, a dispersing medium, a thickener and, if desired, a coloring material.
  • a writing magnet is actuated from the side of the panel surface. Then, the magnetic particles are migrated to the panel surface side to form a display. When the display is no longer required, an erasing magnet is applied from the back side of the panel to settle the magnetic particles from the display surface side of the panel and erase the display.
  • a resin or a metal disposed on the back side of the display panel is used. When a metal is used, a non-magnetic aluminum plate is used.
  • the erasing operation is performed on the back side of the panel.
  • Japanese Patent Publication No. 59-32796 proposes a magnetic material reversal display panel that performs display by reversing a minute magnetic display material.
  • This magnetic material inversion display panel is a dispersion liquid having a residual magnetic moment of 0.2 to 10 emu / g and a yield value of 0.5 N / m 2 or more in which magnetic particles having a coercive force of 500 eelsted or more are dispersed. Is used.
  • This magnetic material inversion display panel can display and erase by applying a writing magnet or an erasing magnet from the display surface side of the panel.
  • a magnetic member has not been used as a back surface member of the panel.
  • the magnetic body reversal display panel described in the above-mentioned Japanese Patent Publication No. 59-32796 is a display in which the magnetic display body is reversed with a writing magnet from the front side of the panel.
  • the present inventors conducted research and experiments to improve the display contrast of the magnetic inversion display panel! / , wherein at the display contrast Bok was c was found to be improved connection, the conventional magnetic reversal display panel has been made blurred is considered shall by the following reasons. In other words, when a small magnetic display is reversed by applying a magnet from the front side, a clear display is obtained if all the magnetic displays are parallel to the display surface. It is considered that color mixing occurs and the contrast is weakened because some colors appear.
  • the ferromagnetic back surface member when a ferromagnetic material is used for the back surface member of the magnetic body reversal display panel, when the display change magnet approaches the front side of the magnetic body reversal display panel, the ferromagnetic back surface member: It is considered that the magnetic flux formed inside the magnetic body reversal display panel is concentrated by the display changing magnet and also acts to make the direction of the magnetic flux perpendicular to the panel.
  • the present invention has been made in view of the above-described problems and the results of the study, and has improved the clarity of erasing and display contrast of a magnetic material anti-feS display panel that performs display by inverting a magnetic display material, and also has a cost reduction. It is an object of the present invention to provide an inexpensive magnetic material reversal display panel.
  • the magnetic substance reversal display panel of the present invention has a yield mainly composed of a particulate magnetic display material having a different color on the S-pole side surface and a different color on the N-pole side surface, a dispersion medium and a thickener.
  • a magnetic material inverted display panel in which a dispersion having a value is enclosed in a container composed of a transparent front member and a rear member,
  • the back surface member has a ferromagnetic flux concentrating member, and the magnetic flux concentrating member concentrates a magnetic flux generated by the display changing magnet when the display changing magnet approaches the front side of the panel;
  • the magnetic flux acts so as to be perpendicular to the back surface member.
  • the magnetic flux concentration member is made of a material containing Fe as a main component or a material obtained by mixing and molding Fe, Co, Ni, or an alloy particle thereof with a synthetic resin or rubber. Can be composed of magnetic members
  • the magnetic flux concentrating member preferably has a thickness of 0.05 mm to 1.6 mm, more preferably a thickness of 0.1 mm to 1.0 thigh.
  • the surface of the back surface member of the magnetic reversal display panel can be made substantially the same color as any one of the S-pole side surface and the N-pole side surface of the particulate magnetic display body.
  • the color of the S-pole side surface and the N-pole side surface of the particulate magnetic display of the magnetic reversal display panel is such that one is bright and the other is blue, and the back surface member is May have a lightness closer to the darker color than the lighter color, or a lightness closer to the lighter color than the darker color.
  • the writing magnet or the erasing magnet used when displaying or erasing the display on the magnetic material inversion display panel of the present invention has a round bar-shaped or rectangular magnet having a N-pole or S-pole at the tip. In such a magnet, the magnetic field lines coming out of the N pole always return to the S pole and form one loop, but the angle of the magnetic field lines to the panel surface is not the same at the center and outside of the magnet.
  • the magnetic flux concentration member having ferromagnetism is provided on the back surface of the display panel, when the N-pole or S-pole magnet is brought into contact with the surface of the display panel, the magnetic field lines are directed in a direction perpendicular to the display panel. Focus on For this reason, a magnetic flux having a high magnetic field line density can be obtained. Therefore, the magnetic display body in the dispersion liquid sealed in the display panel receives a strong magnetic force in the strong magnetic flux and a strong reversal force.
  • the display changing magnet is brought close to the front surface of the magnetic display panel, the magnetic flux on the side surface of the display changing magnet becomes more concentrated in the vertical direction, so that the reversing force of the magnetic display is increased. Therefore, the boundary between the display section and the erasure section of the magnetic display panel becomes clear, so that the contrast can be improved.
  • the magnetic display used in the present invention has different colors on the N pole surface and the S pole surface It is a magnetic material, and this magnetic display is inverted by magnetism to form a display.
  • the N pole surface of the magnetic material is aligned with the panel surface and the color of the N pole surface is obtained.
  • the N pole of the erasing magnet is moved along the display surface on which the color of the N pole surface is displayed, the magnetic display is inverted, and the display surface becomes the color of the S pole of the magnetic display.
  • the S pole of the writing magnet is moved again along the display surface, the magnetic display is reversed and the display of the N pole surface appears.
  • the magnetic flux concentration member having ferromagnetism when a magnetic flux concentration member having ferromagnetism is arranged on the back surface of the display panel, when the writing magnet and the erasing magnet act, the magnetic flux concentrates and acts in a direction perpendicular to the display surface.
  • the orientation of the magnetic poles of most magnetic display bodies is oriented along the direction of the magnetic flux, that is, the tendency of the magnetic pole surface to be arranged in parallel to the display surface is increased, so that a clear display without color mixing and clear contrast is obtained.
  • a material containing Fe as a main component for example, a color steel sheet
  • ferromagnetism such as Fe, Co, Ni, or an alloy thereof, or a material obtained by mixing them with a synthetic resin or rubber. Anything can be used.
  • it becomes a flexible magnetic flux concentrating member, and it is possible to easily change the display surface not only to a flat surface but also to a curved surface depending on the use state of the display panel.
  • the magnetic flux concentration member itself can be used as the back surface member of the container holding the dispersion liquid.
  • the thickness of the magnetic flux concentration member is required to be 0.05 mm to 1.6 mm, and it is effective to set the thickness to 0.1 mm to 1.0 mm. If the thickness of the magnetic flux concentrating member is less than 0.05 mm, some magnetic displays have a magnetic pole surface that is perpendicular or oblique to the display surface, causing color mixing or slightly weakening the contrast. Tend to be. If it exceeds 1.6 mm, the weight will increase. For example, if the panel size is 900 mm, 180 mm, it will be about 20 kg, and the workability and assemblability will deteriorate. . In addition, higher material costs result in higher production costs. In addition, in the case of a wall-mounted type in use, there is also a problem of strength of a board-mounting bracket or a hook-type bracket fixed to a wall, which causes a problem in work such as mounting and dismounting.
  • the magnetic flux concentrating member on the surface member side If the surface has a lightness closer to the darker color than the lighter color, or a lightness closer to the lighter color than the darker color, the display of the light color in the dark background, or the display of the dark color in the lighter background. can do. At this time, the background color is emphasized by the superimposition effect, so that the contrast becomes clearer and the display becomes clearer.
  • FIG. 1 is an explanatory diagram of a magnetic '14 body reversal display panel according to an embodiment of the present invention.
  • BEST MODE FOR CARRYING OUT THE INVENTION Next, specific examples (examples) of embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to the following examples.
  • the magnetic substance reversal display panel P has an outer peripheral edge held by a rectangular frame F made of resin.
  • the magnetic body reversal display panel P has a container 1 and a magnetic flux concentration member 2 provided on the back surface of the container 1.
  • the container 1 has a transparent front member 1a, a sheet-like rear member 1b, and a honeycomb-structured spacer 1c for maintaining an interval between the two members 1a and 1b.
  • the back surface member Pr of the magnetic reversal display panel P is composed of the magnetic flux concentration layer 2 and the sheet-shaped back surface member 1b. It is possible to omit the sheet-like back member 1b and use the magnetic flux concentration member 2 as the back member of the container 1. In that case, the number of components is reduced.
  • the surface member 1a is a polyester film having a thickness of 0.125.
  • the spacer 1c is composed of a honeycomb having a multi-cell structure, and is made of polyester. In shape regular hexagon, the cell size 3.0 hide, also a height of 0. 8 mm c, before Symbol sheet back member 1 b is formed by a polyester film having a thickness of 0.0 5 drowsiness
  • the magnetic flux concentration member 2 bonded to the back surface is formed of a 0.27 mm thick green baked painted steel sheet (manufactured by Toyo Kohan Co., Ltd.).
  • the interval between the front surface member 1a and the back surface member 1b is formed by the honeycomb structured spacer 1c.
  • the container may be formed by having a capsule at an interval between 1b.
  • Dispersion 3 is obtained by dispersing a magnetic display material 5 in a plastic dispersion 4 having a yield value containing a dispersion medium and a thickener as main components.
  • the magnetic display 5 has an S pole side surface colored green and an N pole side surface colored white, and disperses particles having a particle size in the range of 63 to 212 / m.
  • the magnetic display material 5 was uniformly dispersed in the dispersion liquid 4 by mixing and stirring the magnetic display material in a ratio of 15 parts by mass to 100 parts by mass of the liquid.
  • the elements indicated by the reference numerals 1 to 5 constitute the magnetic substance inversion display panel P.
  • the magnetic material inversion display panel P is filled with the dispersion liquid 3 from the open surface side of the two-cam cell in a state where the spacer 1c of the honeycomb structure is adhered to one surface of the surface member 1a.
  • the sheet-shaped back member 1b and the magnetic flux concentration member (flat back member) 2 are sequentially bonded to the open side of the spacer 1c.
  • a 900 * ⁇ XI800 hidden size magnetic reversal display panel P was manufactured.
  • An N-pole erasing magnet is brought into contact with the front side of this magnetic reversal display panel P, and the magnetic display body in the honeycomb cell, which is painted in two colors, is biased toward the front side and the particles are partially overlapped and aligned.
  • a green display surface was formed on the entire surface of the magnetic reversal display panel P while arranging them in such a way as to make the same.
  • a writing operation was performed on this display surface with the S pole writing magnet from above the polyester film on the surface, only the portion where the S pole magnet passed on the green display surface had white contrast. A clear display could be obtained.
  • Table 1 shows the evaluation results of the display performance and operability of the magnetic inversion display panel in which different magnetic flux concentration members are arranged on the back of the same container 1 (see Fig. 1) as in Example 1.
  • a magnetic flux concentrated member 2 formed of green steel sheets (rolled steel foil; Toyo Kohan Co., Ltd.) with different thicknesses as shown in Table 1 on the back of the same container 1 (see Fig. 1) as in Example 1.
  • the same display and erasure were applied to the magnetic flux concentrating member 2 formed of green baked painted steel sheet (manufactured by Toyo Copper Sheet Co., Ltd.). Obtained.
  • a clear display with white contrast was obtained only in the area where the S-pole writing magnet was scanned over the display surface with a green background color.
  • the white display part was operated from above again using the N-pole erasing magnet, the magnetic display body with the white surface facing the surface was reversed, and the entire green display surface was again sharpened. I was able to return to Ming.
  • Comparative Example 1 has no magnetic flux concentrating member 2
  • Comparative Example 2 has a green electrolytic iron foil (manufactured by Nanastar Co., Ltd.) having a thickness of 0.025 mm
  • Comparative Example 3 has a thickness of 1.7 mm.
  • a magnetic flux concentration member 2 having a steel plate whose surface was painted green was attached to the back surface of the same container 1 as in Example 1, and the same display and erasing were performed. The results shown in Table 1 above were obtained.
  • Comparative Examples 1 and 2 a white magnetic display that could not be completely inverted remained in the green color of the actual display surface, and a green magnetic display was also noticeable in the white recording portion. The contrast is weak, and the display has lost a clear impression.
  • Comparative Example 3 there was a problem in contrast and clear display, etc., but when the steel sheet was processed to the desired dimensions or when it was attached to the container 1 (see FIG. 1). There was a problem with workability, and it was not possible to hang the magnetic reversal display panel P on a wall alone.
  • Table 1 shows the evaluation results of the magnetic substance inversion display panels in the above Examples and Comparative Examples.
  • Table 1 shows the results of evaluation of the characteristics of the magnetic material inversion display panel p manufactured in the above-described example and comparative example, and the results.
  • An anisotropic ferrite sintered magnet (diameter 2 mm, height 4 mm: magnetized in the height direction) was used as a writing magnet, and the S pole face of the magnet was brought into contact with the surface of the magnetic reversal display panel.
  • the green display part was inverted to white by moving at a speed of 40 O mm / s, and the inverted part was visually observed.
  • Anisotropic ferrite sintered magnet (length: 150 mm, height: 1 O mm, thickness 2 mm: magnetized in the height direction), touch the N-pole surface of the magnet to the surface of the display panel, move at a speed of 40 O mm / s, and The color was inverted to green, and the inverted portion was visually observed.
  • the green magnetic display is uniformly inverted to white and sharp.
  • the green magnetic display is not evenly inverted to white and is sharp.
  • the magnetic display is sparsely inverted to white and becomes a mixed color.
  • the white magnetic display is uniformly inverted to green and sharp.
  • the white magnetic display is not uniformly inverted to green and is not clear.
  • the magnetic display is sparsely inverted to green and becomes a mixed color.
  • a magnetic flux concentrating member with a different plate thickness is attached to the back side of the display panel surface to produce a wall-reversed magnetic reversal display panel, and a single person attaches and removes a hanging bracket to a hook that is fixed to the wall. The workability in the case of having been examined.
  • the magnetic substance reversal display panel P of the present invention has excellent effects that display and erasure are clear, display contrast is large, and display maintainability is good. I understand.
  • the magnetic body reversal display panel P provided with a back surface member having a magnetic flux concentration member made of a ferromagnetic material requires a special assembling work process. In addition, it can be manufactured by ordinary assembly work. INDUSTRIAL APPLICABILITY As an example of the use of the magnetic reversal display panel of the present invention, it can be used as a board for meetings and lectures in companies, hospitals, schools, etc., as well as an enamel white board.
  • the present invention is not limited to the use described above, and the magnetic substance reversal display panel of the present invention can also be used as a display panel for educational toys.
  • the display age should be as light as possible, since the target age is the younger age group (1.5 to 6 years old).

Abstract

L'invention se rapporte à un panneau d'affichage à inversion de substance magnétique comportant un liquide de dispersion ayant un indice de fluidité donné, composé principalement d'éléments d'affichage magnétiques à particules fines qui sont de couleurs différentes sur une face du côté du pôle S et sur une face du côté du pôle N, un milieu de dispersion et un agent épaississant, lesdits éléments étant enfermés hermétiquement dans un corps de stockage constitué d'un élément d'affichage transparent et d'un élément de face arrière. Ledit panneau se caractérise en ce que l'élément de face arrière possède un élément de concentration du flux magnétique qui, lorsqu'un aimant de changement d'affichage approche de la face avant du panneau, intensifie un champ magnétique généré par ledit aimant de changement d'affichage et oriente le champ magnétique perpendiculairement à l'élément de la face arrière. L'élément de concentration du flux magnétique peut améliorer la netteté de l'affichage/effacement sur le panneau d'affichage à inversion de substance magnétique ainsi que le contraste d'affichage.
PCT/JP2000/009429 1999-12-29 2000-12-28 Panneau d'affichage a inversion de substance magnetique WO2001050188A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2001550485A JPWO2001050188A1 (ja) 1999-12-29 2000-12-28 磁性体反転表示パネル
AU22311/01A AU2231101A (en) 1999-12-29 2000-12-28 Magnetic-material reverse display panel

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP11/377205 1999-12-29
JP37720599 1999-12-29

Publications (1)

Publication Number Publication Date
WO2001050188A1 true WO2001050188A1 (fr) 2001-07-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2000/009429 WO2001050188A1 (fr) 1999-12-29 2000-12-28 Panneau d'affichage a inversion de substance magnetique

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JP (1) JPWO2001050188A1 (fr)
AU (1) AU2231101A (fr)
WO (1) WO2001050188A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006289706A (ja) * 2005-04-08 2006-10-26 Pilot Corporation 罫線を備えた磁気パネル
WO2020095476A1 (fr) * 2018-11-09 2020-05-14 プラス株式会社 Effaceur et dispositif d'affichage l'utilisant

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3938263A (en) * 1968-08-06 1976-02-17 Thalatta, Inc. Compartmentalized micromagnet display device
US4368952A (en) * 1979-12-11 1983-01-18 Pilot Man-Nen-Hitsu Kabushiki Kaisha Magnetic display panel using reversal magnetism
JPS60107689A (ja) * 1983-11-16 1985-06-13 東京磁気印刷株式会社 磁石反転表示磁気パネル
JPH08197877A (ja) * 1995-01-27 1996-08-06 Nok Corp 磁気可視カード
JPH1115412A (ja) * 1997-06-20 1999-01-22 Nok Corp 磁気可視表示板

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3938263A (en) * 1968-08-06 1976-02-17 Thalatta, Inc. Compartmentalized micromagnet display device
US4368952A (en) * 1979-12-11 1983-01-18 Pilot Man-Nen-Hitsu Kabushiki Kaisha Magnetic display panel using reversal magnetism
JPS60107689A (ja) * 1983-11-16 1985-06-13 東京磁気印刷株式会社 磁石反転表示磁気パネル
JPH08197877A (ja) * 1995-01-27 1996-08-06 Nok Corp 磁気可視カード
JPH1115412A (ja) * 1997-06-20 1999-01-22 Nok Corp 磁気可視表示板

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006289706A (ja) * 2005-04-08 2006-10-26 Pilot Corporation 罫線を備えた磁気パネル
JP4596959B2 (ja) * 2005-04-08 2010-12-15 株式会社パイロットコーポレーション 罫線を備えた磁気パネル
WO2020095476A1 (fr) * 2018-11-09 2020-05-14 プラス株式会社 Effaceur et dispositif d'affichage l'utilisant
JP2020076900A (ja) * 2018-11-09 2020-05-21 プラス株式会社 イレーザーおよびこれを利用した表示装置

Also Published As

Publication number Publication date
AU2231101A (en) 2001-07-16
JPWO2001050188A1 (ja) 2004-03-04

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