On-time modulation for liquid crystal displays with insufficient charging time

Seung-Woo Lee

doi:10.1117/1.2890161

1 March 2008 On-time modulation for liquid crystal displays with insufficient charging time

Seung-Woo Lee

Author Affiliations +

Optical Engineering, Vol. 47, Issue 3, 030503 (March 2008). https://doi.org/10.1117/1.2890161

Abstract

I propose on-time modulation (OTM) to compensate for insufficient time to charge column lines in liquid crystal displays (LCDs). OTM modulates turn-on times of row signals as a function of column signal delay. Most LCD panels for monitors and laptop computer displays adopt a two-line inversion. OTM extends turn-on times of even row signals and reduces pulse widths of the next odd rows. Experimental results showed that turn-on times of even row signals should be unequally extended in accordance with a distance of the row from a column driver. Because OTM successfully solves the charging time problem, it contributes to the success of 120-Hz driving, which has been widely investigated to solve motion blur in LCDs, but has a very severe charging problem.

©(2008) Society of Photo-Optical Instrumentation Engineers (SPIE)

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Seung-Woo Lee "On-time modulation for liquid crystal displays with insufficient charging time," Optical Engineering 47(3), 030503 (1 March 2008). https://doi.org/10.1117/1.2890161

Published: 1 March 2008

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