Ferroelectric Liquid Crystal Display (FLCD) is a display technology based on the ferroelectric properties of chiral smectic liquid crystals. It has been proposed in 1980 by Clark and Lagerwall.[1]
As direct-view displays, the FLCD could not displace the LCDs based on nematic liquid crystals using the Twisted nematic field effector In-Plane Switching. Today, the FLCD is not used as direct-view display but in microdisplays based on Liquid Crystal on Silicon devices. Used in LCoS the dot pitch of such displays can be as low as 8 µm giving a very high resolution display on a small area. To produce color and grey-scale, time multiplexing is used, exploiting the sub-millisecond switching time. These find applications in 3D head mounted displays (HMD), image insertion in surgical microscopes and electronic view finders where direct-view LCDs fail to provide more than 600 ppi resolution.
Ferroelectric LCoS find commercial use also in Structured illumination in 3D-Metrology and Super-resolution microscopy.
No comments:
Post a Comment