Smart film basics and how PDLC works
The core technology, switching behaviour and terminology.
What is smart film?
Direct answer: Smart film is an electrically switchable layer applied to suitable glass. Most privacy smart film uses PDLC technology to change between a light-scattering privacy state and a clearer powered state, allowing existing glazing to provide on-demand visual privacy.
What does PDLC stand for?
Direct answer: PDLC stands for Polymer Dispersed Liquid Crystal. Tiny liquid-crystal droplets are dispersed through a polymer layer between conductive films; an electric field changes their alignment and therefore how light passes through the material.
How does switchable smart film work?
Direct answer: With the approved power system on, the liquid crystals align and the film becomes clearer. With power removed, they scatter light and the film returns to its frosted privacy state. The transformer and controls must match the selected film.
Is smart film clear or opaque when the power is off?
Direct answer: PDLC privacy film is normally in its frosted privacy state when unpowered. That fail-private behaviour is useful for many rooms, but it also means the glass will become private during a power cut.
Is smart film the same as smart glass?
Direct answer: No. Retrofit smart film is applied to an existing glass surface, while factory smart glass normally contains a switchable layer laminated within a manufactured glass unit. They can provide similar privacy functionality but differ in manufacture, replacement work, edge protection, cost and specification.
Is smart film the same as frosted window film?
Direct answer: No. Static frosted film stays frosted. Switchable PDLC film changes between a clearer powered state and a frosted privacy state, so the same pane can alternate between openness and privacy.
Can smart film be gradually dimmed?
Direct answer: Many privacy PDLC systems are designed primarily for clear/private switching rather than continuous tint control. Some control arrangements can affect appearance, but only use modes and voltages approved for the selected film; do not assume it behaves like electrochromic tinting.
How quickly does smart film switch?
Direct answer: The visual change is effectively immediate in normal use, typically perceived in less than a second. Use the current data sheet if a project needs a formal switching-time value.
Can smart film be used as a projection surface?
Direct answer: The privacy state can work as a rear-projection surface in suitable lighting and viewing conditions. Projection brightness, hot spots, room light and intended viewing direction should be tested with a sample rather than assumed.
What names are used for the same product category?
Direct answer: Common search terms include switchable smart film, smart privacy film, PDLC film, electric privacy film, smart window film, switchable privacy film and retrofit smart glass film. Product identity still matters because not every item sold under those labels has the same specification.
PriviFilm’s UK route
PriviFilm™ is the switchable smart film brand from parent company PriviTechnologies. Forti Nova Ltd is the authorised UK distributor, providing UK supply, project support, professional installation routes and practical installer training.