Electrophoretic device, method for driving same, and electronic apparatus

摘要

An electrophoretic device includes: an electrophoretic layer including a plurality of first particles having a relatively high mobility and charged with negative electricity and a plurality of second particles having a relatively low mobility and charged with positive electricity; a first electrode and a second electrode facing each other via the electrophoretic layer; and a control unit applying a first voltage between the first and the second electrodes to control such that the first electrode is at a higher potential than the second electrode and applying a pulse-form second voltage between the first and the second electrodes intermittently a plurality of number of times to control such that the first electrode is at a lower potential than the second electrode, each second voltage applied by the control unit the plurality of number of times having an approximately same pulse width and an approximately same voltage value, as well as the number of times of application of the second voltage being determined based on a desired gradation.

主权项

1. An electrophoretic device, comprising:
a first electrode, the first electrode being arranged on a display side of the electrophoretic device; a second electrode; an electrophoretic layer formed between the first electrode and the second electrode, the electrophoretic layer including:
a first particle charged with negative electricity and exhibiting a first color; anda second particle charged with positive electricity, and exhibiting a second color; the first particle having a higher mobility than the second particle; and a control circuit i) initially applying a first voltage between the first and the second electrodes such that the first electrode is at a higher potential than the second electrode so that the first particle moves towards the first electrode to correspond to a first color status; and ii) applying a plurality of pulse voltages between the first electrode and the second electrode such that the first electrode is at a lower potential than the second electrode, each of the pulse voltages having a substantially same voltage width and a second substantially same voltage value, the number of times of application of the pulse voltage being determined based on a desired gradation, wherein the voltage pulse width is smaller when shifting from the second color to the first color than when shifting from the first color to the second color.