Guest-Host Interactions in Liquid Crystals

Abstract

The liquid crystal display devices using the guest-host interactions do not require that substrates are optically flat, and have wide viewing angle. Therefore, the authors have studied the dichoric dyes used in these display devices. A part of the results obtained was described in another journal. In this paper, the authors have clarified some dyes available for the guest-host cell. The influence of the thickness of the liquid crystal layer in a cell on color switching and response characteristics have been made clear. If the product of the dye concentration and the cell thick ness is kept constant, the variation of the cell thickness will not change the color switching characteristics. The recovery time is proportional to the square of the cell thickness. By adjusting the dye concentration we can make a thin cell with a good color switching characteristic and with the short recovery time.