Abstract
The electrophoretic display (EPD) has become the main solution to
electronic papers, but there are several limitations when it is being
driven. First of all, the optical response curve of the EPD is nonlinear and
temperature sensitive. In addition, the number of gray levels that can be
displayed is also quite limited. The image quality is unsatisfactory if the
images shown on the panel are not preprocessed to increase the number of
visual gray levels and compensate the characteristics of the EPD. In this
paper, we present an integrated image tool to automatically estimate the
reflectance function curves under different ambient temperatures, perform
adaptive image halftoning to improve visual quality, and calibrate the image
to compensate the nonlinear response of EPD. The proposed approach has been
verified on practical EPD panels and promising results have been
achieved.
© 2010 IEEE
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