Electrowetting display apparatus and dye composition for electrowetting display

摘要

The electrowetting display apparatus includes a display unit including: a first substrate at least one surface of which is electroconductive; a second substrate disposed to face the electroconductive surface of the first substrate; a hydrophobic insulation film disposed on the electroconductive surface side of the first substrate; a non-electroconductive oil which is provided between the hydrophobic insulation film and second substrate movably on the hydrophobic insulation film and includes a non-polar solvent and an azamethine-based colorant containing two colorant mother nuclei bonded via a linking group represented by ═N—; and an electroconductive hydrophilic liquid provided between the hydrophobic insulation film and second substrate to contact the oil; in which an image is displayed by applying a voltage between the hydrophilic liquid and the electroconductive surface of first substrate and changing the shape of interface between the oil and hydrophilic liquid.

主权项

1. An electrowetting display apparatus, comprising a display unit, the display unit comprising:
a first substrate, at least one surface of which is at least partly electroconductive; a second substrate disposed so as to face the at least partly electroconductive surface of the first substrate; a hydrophobic insulation film disposed on at least a part of the at least partly electroconductive surface of the first substrate; a non-electroconductive oil that is provided between the hydrophobic insulation film and the second substrate movably on the hydrophobic insulation film and that comprises a non-polar solvent and an azamethine-based colorant comprising two colorant mother nuclei bonded via a linking group represented by ═N—, the two colorant mother nuclei being directly bonded to the linking group represented by ═N—, the azamethine-based colorant having a solubility in n-hexane at 25° C. and 0.1 MPa of 1% by mass or more; and an electroconductive hydrophilic liquid provided between the hydrophobic insulation film and the second substrate so as to contact the oil; wherein an image is displayed by applying a voltage between the hydrophilic liquid and the at least partly electroconductive surface of the first substrate and changing the shape of an interface between the oil and the hydrophilic liquid.