Ionic colored liquid and image display apparatus using the same

Details Ionic colored liquid and image display apparatus using the same Ionic colored liquid and image display apparatus using the same

2006-03-16

2010-06-01

Schwartz, Jordan M. (Department: 2873)

Optical: systems and elements

Optical modulator

Light wave temporal modulation

C359S665000, C359S666000

Reexamination Certificate

active

07729034

ABSTRACT:
An ionic colored liquid according to the present invention moves with a voltage application, and contains as principal components at least a coloring material whose base material is a pigment, and an ambient temperature molten salt combining a cation and an anion. The coloring material has a mean volume particle diameter of equal to or smaller than 5 μm and a coefficient of variation in a volume particle size distribution of equal to or smaller than 50. In an image display apparatus according to the present invention, a surface energy of the ionic colored liquid (21) is varied according to whether or not a voltage is applied to the ionic colored liquid (21), thereby moving the ionic colored liquid (21) or increasing/decreasing a surface area of the liquid on a display surface side, so that an image is displayed. In this manner, the ionic colored liquid can be dispersed stably in a dispersion medium and applied to an electric-field induction type electronic paper display or the like.

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