AN3110 Datasheet, PDF (1/10 Pages) STMicroelectronics – Using the STVM100 to automatically adjust VCOM voltage in e-paper

AN3110
Application note
Using the STVM100
to automatically adjust VCOM voltage in e-paper
Introduction
The widespread use of multimedia electronic devices, coupled with environmental concerns
over the manufacturing and use of traditional paper products, provide the opportunity for the
utilization of electronic paper (e-paper).
Electronic paper is the best replacement for conventional paper. A high-quality image can
be displayed for weeks without power. Energy is consumed only during the short refresh
time. Unlike its counterpart, liquid crystal display (LCD) devices, e-paper does not require a
backlight, which not only saves energy, but also makes reading more comfortable.
Achieving high-quality images on e-paper requires the correct setting of the VCOM voltage
on the PC board. STMicroelectronics offers the STVM100 VCOM calibrator which is ideal
for e-paper applications and allows the VCOM voltage to be set automatically. In this
application note, the e-paper principle is briefly described so that the user can understand
the necessity of an accurate VCOM voltage setting and how the STVM100 can be used for
this purpose.
January 2010
Doc ID 16799 Rev 1
1/10
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