Abstract
This paper presents an effective driving method to reduce
the power consumption of an in-plane switching (IPS) mode thin-film transistor
liquid crystal display (TFT-LCD) with a negative
liquid crystal (LC). Despite the higher transmittance efficiency of the negative
LC, it is not effective to reduce the power consumption of the IPS mode TFT-LCD
because of the driving voltage, which is 30% higher than that of the positive
LC. To complement the higher driving voltage, the driving method, which can
modulate the amplitude of the common voltage
$({\rm V}_{\rm COM})$
inversion without
side effects, is proposed for low power consumption. In addition, a novel
pixel structure is developed to reduce the data load. The measured power consumption
is 22.5 W at the full white gray level in a 17-in full high-definition (FHD)
IPS mode TFT-LCD. The measured result shows that the proposed method can reduce
the power consumption by 19% and 10% as compared to that of the conventional
method using the negative LC and positive LC, respectively.
© 2014 IEEE
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