Abstract
Although the electrophoretic display (EPD) has become
the main solution to the display of an electronic reader (E-Reader), the latency
of displaying a new image on the EPD is much lower than that on liquid crystal
displays. This problem leads to poor user experience when a user wants to
annotate some important points by supplying with more comments on the EPD.
The technical issues that should be dealt with include the pixel interpolation
between the plotted pixels and the fast driving waveform design for those
interpolated pixels. In this paper, we propose a new hardware engine that
performs real-time pixel interpolation to compensate the resolution mismatch
between the touch panel and the EPD. In addition, a new fast driving scheme
for plotting the interpolated pixels to the black state on the EPD is also
proposed. The experimental results show that the engine can complete the pixel
interpolation in 2 ms and the pixels will not be overdriven. The overall latency
of the pen tracking function is much shorter than that of the previous approaches.
© 2012 IEEE
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