Electrophoretic device, driving method of electrophoretic device, and electronic apparatus
AssigneeSeiko Epson Corporation
InventorsHideyuki Kawai, Hirokazu Yamamoto
Life of this patent
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Abstract
There is provided an electrophoretic device which comprises an electrophoretic layer containing dispersion medium and electrophoretic particles dispersed in the dispersion medium, controls the position of the electrophoretic particles according to the electric potential applied to electrodes, and can maintain the electrophoretic particles at a desired position for a long time by using the dispersion medium formed of mixture consisting of a plurality of substances having small mutual solubility.
Claims24
An electrophoretic device comprising:
- an electrophoretic layer containing a dispersion medium and electrophoretic particles dispersed in the dispersion medium, the position of the electrophoretic particles controlled according to an electric potential applied to electrodes proximate the electrophoretic particles;
- the dispersion medium being a mixture of a plurality of substances, a mutual solubility of the substances being low.
In an electrophoretic device in which an electrophoretic layer containing a dispersion medium and electrophoretic particles dispersed in the dispersion medium is disposed between a pair of electrodes, the improvement comprising:
- the dispersion medium being a mixture of a plurality of substances, a mutual solubility of the substances being low.
A driving method for an electrophoretic device including an electrophoretic layer containing a dispersion medium and electrophoretic particles dispersed in the dispersion medium, the position of the electrophoretic particles being controlled according to an electric potential applied to electrodes proximate the electrophoretic particles, the method comprising:
- providing the dispersion medium as a mixture including a plurality of substances, the mixture being a fluid at an electrophoretically operational temperature and an optically opaque solid at a temperature lower than the electrophoretically operational temperature;
- and
- applying the electric potential to the electrodes with the temperature of the electrophoretic layer being set to the electrophoretically operational temperature.
A method for driving an electrophoretic device including an electrophoretic layer disposed between a pair of electrodes, the electrophoretic layer containing a dispersion medium and electrophoretic particles dispersed in the dispersion medium;
- the method comprising:
- providing the dispersion medium as a mixture including a plurality of substances, the mixture being a fluid at an electrophoretically operational temperature for performing an electrophoretic operation in the electrophoretic layer, and an optically opaque solid at a temperature lower than the electrophoretically operational temperature;
- and
- applying an electric potential to the electrodes with the temperature of the electrophoretic layer being set to the electrophoretic operational temperature.
An electrophoretic device comprising:
- a dispersion medium;
- and
- a plurality of electrophoretic particles contained in the dispersion medium;
- wherein the dispersion medium includes a plurality of substances and boundaries are formed between the substances such that light incident thereon scatters.
The electrophoretic device according to claim 19, wherein a voltage is applied while a temperature of the dispersion medium is above the one of the melting points.
An electrophoretic device comprising:
- a dispersion medium;
- and
- a plurality of electrophoretic particles contained in the dispersion medium;
- wherein the dispersion medium includes a plurality of substances, each of which has a different refractive index.
Dependencies are inferred from the claim text.