Abstract
We have developed a novel polymer dispersed liquid crystal (PDLC) called IRIS^<1)〜3)> with high transparency, high contrast, and low power consumption. IRIS operates in a reverse mode, and is capable of scattering incident light in the ON state. In this paper, we studied some factors which influence the brightness and the driving voltage, and optimized them. We applied IRIS panels to a double layer type combination watch which has both the functions and design of an analog watch as well as a digital watch's merits. The combination watch ("White oN") was put on the market in February, 1997. The "White ON" is a combination watch that has a white digital display that is shown on the surface in front of the analog watch.
