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US 2022/0035221 A1Published application
Light-modulating electrophoretic device
AssigneeE Ink Corporation
InventorDonal Martin O'Keeffe
Life of this patent
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Abstract
A variable light transmittance sheet comprises a first transparent electrode and a second transparent electrode spaced apart from the first electrode, and between the electrodes an electrophoretic cell containing an electrophoretic ink and one or more non-planar solid polymer elements. In an embodiment, the electrophoretic ink includes charged particles in a suspending fluid, and 75% or more by mass of the suspending fluid is an organosilicone or an aliphatic hydrocarbon and the solid polymer is a fluorinated elastomeric polymer.
Claims8
A variable light transmittance sheet comprising:
- a first transparent electrode;
- a second transparent electrode substantially parallel to the first transparent electrode and spaced apart from the first transparent electrode;
- an electrophoretic cell disposed between the first transparent electrode and the second transparent electrode, the electrophoretic cell being bounded by the first transparent electrode, one or more optically-transparent, non-planar, solid polymer elements, and walls substantially perpendicular to the first transparent electrode and extending to the one or more optically-transparent, non-planar, solid polymer elements, the electrophoretic cell containing an electrophoretic ink including charged particles suspended in an optically-transparent suspending fluid,
- wherein at a visible wavelength, over a temperature range between 0° C. and 70° C., the refractive index of the optically-transparent, non-planar, solid polymer elements and the refractive index of the suspending fluid differ by less than 0.0075.
1 more element
Dependencies are inferred from the claim text.