Abstract
For all of the electronic modules in a liquid crystal display
(LCD), the power consumption of data driver is only second to the
backlight. Most of the power is used for converting the signal from
digital to analog. In this paper, we proposed a new kind of pixel
circuit with fully digital driving. As a result, the signal converting
part in the conventional data driver can be omitted, and thus the
power consumption can be greatly reduced. The proposed pixel circuit
contains two thin-film transistors (TFTs) and a resistor in series,
forming a discharging path for pixel voltage. There is also another
transistor used to preset the pixel voltage. The gray level is controlled
by the pulse width of the data source when the pixel is enabled by
the scan voltage. The operation of the novel design is verified by
simulation in the cases of a full high-definition panel. The proposed
pixel circuit with the new driving method is an innovation approach
to reduce data driver power consumption.
© 2015 IEEE
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