Magnetic display panel using reversal magnetism

Details Magnetic display panel using reversal magnetism Magnetic display panel using reversal magnetism

G - Physics

09

F

40/40, 375/49

G09F 9/37 (2006.01) B43L 1/00 (2006.01) G02F 1/09 (2006.01) G02F 1/17 (2006.01)

Patent

CA 1165911

P03-24792M/TJK/80 ABSTRACT OF THE DISCLOSURE A magnetic reversal type display panel which provides clear display of records which can easily be raised by an erasure magnet. A liquid dispersion is sealed between two opposed surface plates, preferably in a cell structure. The liquid dispersion contains fine reversible magnetic display grains having magnetic poles of opposite signs tinged with different colors, a dispersion medium and a fine grain thickener. The fine reversible magnetic display grains have a residual magnetic moment within the range of 0.2 to 10 emu/g and a coercive force of not less than 500 oersteds and the liquid dis- persion has a yield value of not less than 5 dynes/cm2.

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