Electrophoretic display device, electronic timepiece, and operating method of an electrophoretic display device

摘要

An electrophoretic display device includes a display unit including two substrates and an electrophoretic element containing electrophoretic particles disposed between the two substrates, and able to display at least a first color and a second color; a processor unit having a first mode and a second mode of lower power consumption than the first mode; a time information generating unit that generates time information; and a drawing unit that displays an image on the display unit. The time information generating unit includes a timer that counts time, and sends a counting completed signal to the processor unit when the timer counts a specific image; and the processor unit goes from the first mode to the second mode after starting counting by the timer in the first mode, and when the counting completed signal is then received, goes from the second mode to the first mode.

主权项

1. An electrophoretic display device comprising:
a display including two substrates and an electrophoretic element containing electrophoretic particles disposed between the two substrates; a processor having a first mode and a second mode of lower power consumption than the first mode; a time information generator that generates time information; and a drawing chip that displays an image on the display and that has a power-on state and a power-off state; wherein the time information generator includes a timer that counts time, and sends a counting completed signal to the processor when the timer counts a specific time period; when the counting completed signal is received, the processor, in sequence, transitions from the second mode to the first mode, sends drawing information of the image to the drawing chip, restarts counting by the timer, and transitions from the first mode to the second mode; and the drawing chip transitions to the power-on state to drive a first potential difference between the two substrates, and transitions to the power-off state wherein it does not drive the two substrates, wherein the first mode of the processor is executed while the drawing chip is in the power-on state and the power off state, and the second mode of the processor is executed while the drawing chip is not in the power-on state but in the power-off state.