The effect of dielectric constant on ion adsorption in liquid crystal devices

49.2: Image Sticking Reduction of Fringe Field Switching LCDs

“…From material perspective, an alignment layer with low  or a LC material with high <> are helpful in obtaining a higher E a and lower E d . In addition, making the resistivity of LC close to that of an alignment layer in also significant [7,18,19]. On the device side, the choice of LC mode is vital.…”

“…Therefore, the free ion density in the negative LC is higher, resulting in a lower VHR [18] and higher residual DC voltage higher for the n-FFS cell. Secondly, the mismatch between dielectric constant is also responsible for the more severe image sticking of n-FFS [19]. According to previous studies, the change in free energy (E) when an ion goes from a medium of dielectric constant  1 to another with  2 is [19]:…”

Image sticking in liquid crystal displays with lateral electric fields

“…Note that V r,s directly determines the severity of image sticking, so it is crucial to reduce V r,s by optimizing the LC and alignment material properties. 20,35,36…”

Effect of TiO2nanoparticles dispersion on ionic behaviour in nematic liquid crystal

“…[1] Another is the application of ion trapping layer over the indium tin oxide (ITO) electrode. [2] In the third approach dispersion of different guest entities in LC takes place to tailor the properties. These post synthesis methods are much faster and easier to alter the LC properties and also cost effective.…”