| abstract |
The present invention relates to a liquid crystal light shutter having a dimming layer between two transparent conductive substrates, wherein the dimming layer is a cholesteric liquid crystal obtained by photopolymerizing a prepolymer containing 20 to 60% by weight of urethane acrylate. Or a liquid crystal optical shutter formed by coating a composite liquid crystal containing a chiral smectic C liquid crystal or a mixture thereof with a film during photopolymerization, having a driving voltage of 4-8 V, a rising time of 4-10 ms, a decaying time of 4-13 ms, and a transmittance. More than 90%, the maximum contrast bit (Tmax, To) has excellent performance of more than 120. |