WEDNESDAY 08 SEPTEMBER, 2010 |
Seiko's Solar Powered Electronic Ink Display Watch
Seiko Watch Corporation has announced the launch of the world's first Electrophoretic
Display (EPD or electronic ink) watch. Available world-wide from December this
year, this is a watch the company says will never need a battery replacement and
is recharged courtesy of solar power.
The watch boasts a high-resolution screen of 300 dpi and offers incredible
accuracy. The watch receives radio wave signals whenever in range of
transmitters that help maintain accuracy to one second in every 30 million
years. Accuracy when not in the range of a radio signal is 15 seconds per month.
Powered by a self-recharging solar battery, once charged, the new EPD watch can
operate for up to nine months without further exposure to light. The watch also
offers a sleep mode during which it can remember the time and receive radio
signals for over three years. If in sleep mode, once a button is pressed or the solar cells are exposed to light,
the watch reawakens and the display operates normally.
Much of the power saving magic is due to the Electrophoretic Display, which uses
electronic ink technology. Electronic ink uses thousands of tiny microcapsules
that are around the diameter of a human hair. Each capsule incorporates
negatively charged white particles and positively charged black particles. When
a negative electric field is applied, the white particles move to the top of the microcapsule where they become visible
to the user and form the basis of the readout. Seiko's Active Matrix EPD watch offers a four-shade grey scale readout.
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