How Does PDLC Switchable Film work?

PDLC (Polymer Dispersed Liquid Crystal) is a medium whose light scattering power is adjustable through applying an electric field. In their natural (uncharged) state, the PDLC droplets randomly align.

PDLC Film consists of a polymer matrix of liquid crystals enclosed by electrically conductive Indium Tin Oxide-coated PET film. The resulting PDLC Film has wiring attached to a conductive copper strip (busbar) along the film’s edge.  In a low voltage platform, this wiring is connected to a step-down transformer through which power is supplied for the “on” (clear) state.  In their natural (uncharged) state, the PDLC droplets randomly align, thus creating the an opaque translucent condition.

Two sheets of glass are laminated over the PDLC film. The components are assembled under high pressure and temperature to form a single unit.

The ordinary refractive index of these liquid crystals does not match that of the polymer, and the incident light is thus scattered, resulting in a translucent state. When an electric field is applied across the material, the PDLC droplets re-orient, and subsequently the extraordinary refractive index of the liquid crystal matches that of the polymer. Therefore, the incident light can pass through, resulting in a transparent state.

The science behind the magic

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How to make busbar of PDLC smart film?     https://www.youtube.com/watch?v=YPWLsuAQfuc

Guide of installing self-adhesive smart film   https://www.youtube.com/watch?v=_GcGLkMVqvM

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