A straightforward method of measuring MPRT using LC test cells

作者：Cerrolaza Beatiz^*; de Smet Herbert; Cerrolaza Juan J; Geday Morten A; Quintana Xabier; Oton Jose M

来源：Journal of the Society for Information Display, 2010, 18(6): 434-444.

DOI：10.1889/JSID18.6.434

• Motion-picture response time (MPRT)
• liquid-crystal response time (LCRT)
• gray-to-gray temporal transitions (G2G)
• human vision systems (HVS)
• sample and hold (S&amp
• H) effect

A simple method based on integration over time to measure motion-picture response time (MPRT) has been developed. Liquid-crystal response time (LCRT) alone cannot express the motion blur perceived by the observer; one must also take into account the transition between intermediate gray levels and the sample-and-hold effect. The method shows similar results to other previously reported methods based on temporal integration, while being simpler and more straightforward. Indeed, just monopixel test cells are required for measuring MPRT. This method can be used for comparison between different materials, alignments surfaces, or other manufacturing details with no need of fabricating the whole LCD structure. Nevertheless, the method could also be used for characterization of commercial displays with major changes. A comparison of MPRT values for three different liquid-crystal materials is presented in this work. The behavior of the MPRT parameter in the case of an ideal liquid-crystal material with an LCRT equal to zero has also been studied. The results obtained for this material have been used as a reference to establish comparisons with real materials.

• 出版日期2010-6