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Optical Engineering • Open Access

Adaptive charge sharing method for liquid crystal displays with lower power consumption
Author(s): Seung-Ryeol Kim; Jong-Man Kim; Minkoo Kim; Seung-Woo Lee

Paper Abstract

This paper proposes an adaptive charge sharing (ACS) method for reducing power consumption in liquid crystal displays (LCDs). Our ACS method involves calculating the power consumption of all data lines assuming the charge is shared and analyzing the analog characteristics of the data transitions. With conventional CS, charge is shared between data lines only when the polarities of data signals change. Our ACS method selectively shares charge even when no polarity change occurs, but only if CS provides an overall reduction in power consumption. To compare the performance of ACS and conventional CS, we applied the ACS method to common inversion methods, namely, column, two-dot, and Z inversion. Our simulation results demonstrate that the ACS method can effectively reduce power consumption, especially with the column and Z inversion methods. The average power consumption of the ACS method with column and Z inversion was 87.7% and 84.7%, respectively, of the conventional CS power consumption.

Paper Details

Date Published: 15 May 2015
PDF: 7 pages
Opt. Eng. 54(5) 053111 doi: 10.1117/1.OE.54.5.053111
Published in: Optical Engineering Volume 54, Issue 5
Show Author Affiliations
Seung-Ryeol Kim, Kyung Hee Univ. (Republic of Korea)
Jong-Man Kim, Kyung Hee Univ. (Republic of Korea)
Minkoo Kim, Kyung Hee Univ. (Republic of Korea)
Seung-Woo Lee, Kyung Hee Univ. (Republic of Korea)

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