Abstract
We propose to replace the rectangular select pulses in all the conventional
addressing techniques with either trapezoidal or triangular select waveforms
to reduce the power dissipated in rms responding liquid crystal displays.
A realistic analysis that includes the distortion in the addressing waveforms
is presented for trapezoidal, triangular profiles, as well as their equivalents
in discrete domain viz. the multi-step profiles and the results are compared.
Good brightness uniformity among pixels that are driven to same state is achieved
as a spinoff of the analysis and application of a correction voltage at the
end of the select pulses. Increase in hardware complexity and the cost is
minimal because just the voltage level generator circuit is modified to achieve
reduction in power dissipation with new waveform profiles.
© 2008 IEEE
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