PDLC stands for polymer dispersed liquid crystal. Liquid crystals are well known for flat panel displays. Liquid crystal display, LCD is the most popular flat panel displays which are applied in daily use products such as portable computer, cellular phones, calculators, digital clocks and watches, etc. In LCD, electricity is used to change the shape of liquid crystals to allow light to pass through and thus forming colors, images, figures and numbers on the displays.
In polymer dispersed liquid crystal, it is just simply a combined application of polymers and liquid crystals. Liquid crystals respond to an electrical charge. When current flows, each crystal droplet is activated to align parallel permitting light passes through resulting in transparency. When electrical charge is absent, liquid crystals droplets are randomly oriented. Light is heavily scattered. It does not permeate in a straight way and thus, resulting in opaque.
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