Switchable Glass (PDLC Glass)

Switchable glass uses PDLC (Polymer Dispersed Liquid Crystal) technology to instantly switch between transparent and opaque states with the flip of a switch, offering an innovative solution for privacy and daylighting.

Core Technology (PDLC)

• Off State (Opaque): Liquid crystal droplets are randomly oriented, scattering light to create a milky, non-transparent appearance.

• On State (Transparent): Liquid crystals align under an electric field, allowing light to pass through directly for instant transparency.

• Response time: milliseconds | Power consumption: approx. 3-5W/m²

Main Types

Key Performance

• Transmittance in transparent state: ≥75%

• Haze in opaque state: ≥90% (still transmits ~60-80% of light)

• Driving voltage: AC 48-65V

Core Advantages

• Instant privacy/transparency switching – no curtains needed

• Maintains natural daylighting, avoiding dark, oppressive spaces

• Can serve as a projection screen in the opaque state

• Tempered laminated construction for safety and shatter resistance

Core Applications
Office partitions, ICU observation windows, hotel bathroom enclosures, residential windows/doors, train/aircraft windows

Selection Considerations

• Exterior applications require IGU construction + Low-E coating

• Film width limitation (~1.8m) – larger sizes require visible seams

• Protect from long-term UV exposure to prevent yellowing

• If the PDLC film fails, the entire unit must be replaced

Differences from Electrochromic Glass

Development Trends
Large-format seamless splicing, colored/patterned films, low-voltage wireless control, integration with electrochromic technology.

Summary
Switchable (PDLC) glass offers instant, on-demand privacy while preserving natural light, and can even function as a projection screen. It is a key element of modern intelligent space design.