Electrophoretic device, method of driving electrophoretic device, and electronic apparatus
AssigneesSeiko Epson Corporation, E Ink Corporation
InventorHideyuki Kawai
Life of this patent
Estimating the term…
Abstract
The electrophoretic device of the present invention obtains a plurality of different optical characteristics by changing a proportion of number of pixel electrodes supplied with a first voltage and a number of pixel electrodes supplied with a second voltage. The transition of the optical characteristics accompanied by the changes of the proportion is previously obtained as an actual measurement value. The preferable proportion displaying the desired optical characteristic is calculated based on the actual measurement value.
Claims10
An electrophoretic device comprising:
- an electrophoretic dispersion liquid that includes a liquid dispersion medium and electrophoretic particles;
- a plurality of pixel electrodes;
- and
- a voltage supply device that separately supplies a plurality of said pixel electrodes with a first voltage or a second, voltage according to a proportion “x”, the proportion “x” being a proportion of a number of pixel electrodes supplied with the first voltage and a number of pixel electrodes supplied with the second voltage, wherein
- for each of a plurality of values of the proportion “x”, a measured value R is obtained by measuring an actual optical characteristic in advance, and
- when an image is displayed, a modified proportion “x” corresponding to a desired optical characteristic of the image is calculated based on the measured value R and the modified proportion “x” is used by the voltage supply device.
A method of driving an electrophoretic device, said electrophoretic device comprising:
- an electrophoretic dispersion liquid that includes a liquid dispersion medium and electrophoretic particles;
- a plurality of pixel electrodes;
- and
- a voltage supply device that separately supplies a plurality of said pixel electrodes with a first voltage or a second voltage,
- and the method comprising:
- when a proportion “x” is defined as a proportion of a number of pixel electrodes supplied with the first voltage and a number of pixel electrodes supplied with the second voltage, obtaining a measured value R for each of a plurality of values of the proportion “x”, by measuring an actual optical characteristic in advance, and
- when displaying an image, calculating a modified proportion “x” corresponding to a desired optical characteristic based on said measured value R, and supplying said first voltage or said second voltage from said voltage supply device to a plurality of said pixel electrodes corresponding to said modified proportion “x”.
Dependencies are inferred from the claim text.