| 摘要 |
PURPOSE:To obtain a display which has large color difference, is sharp and is free from uneven colors by sealing a liquid dispersed with pigment particles of the color tone different from the color tone of a high-insulating coloring dispersion medium into the spacing between electrodes facing each other and incorporating a specific aluminum chelate into the dispersion or coating the same on the pigment particles. CONSTITUTION:This electrophorectic display element is formed by sealing the liquid dispersed with the pigment particles of the color tone different from the color tone of the high-insulating coloring dispersion medium into said dispersion medium into the spacing between two sheets of the electrodes which face each other and at least one of which is transparent. Said element is further formed by incorporating the aluminum chelate expressed by the formula into the dispersion medium or coating the same on the pigment particles. The pigment particles which exhibit a positive or negative polarity in the dispersion medium is used. The white pigment particles are exemplified by titanium oxide, etc., the yellow pigment particles by yellowish iron oxide, etc., and the red pigment particles by iron oxide red, etc. On the other hand, a high-insulating org. solvent colored by a dye is used for the coloring dispersion medium and is exemplified by p-xylene, toluene, etc. The amt. of the aluminum chelate to be used is usually 0.1-10wt%, more preferably 0.5-5wt% by the weight of the pigment particles.
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