Small Liquid Crystal Light Valve - Controllable Shutter Glass

A Liquid Crystal Light Valve (LCLV) is a small piece of liquid crystal material sandwiched between two glass sheets that can be electronically switched from semi-transparent to opaque. By varying the applied voltage, you can control how much light passes through — perfect for "reveal" effects, variable-opacity displays, and electronic shutter applications.

At rest (no voltage), the glass appears tinted grey since ambient light is unpolarised. Applying voltage from around 1.0 V begins darkening the panel, with full opacity reached at approximately 4.0 V (blocking ~95% of light). Maximum recommended voltage is 5.0 V.

Key Features

• Variable Opacity – Adjust voltage between 1.0–4.0 V to control light transmission
• Near-Zero Current Draw – Capacitive behaviour means the panel holds its state even after voltage is removed
• Reset via 0 V – Apply 0 V or connect a drain resistor to return to the transparent state
• Maximum Voltage – 5.0 V DC
• Light Blocking – Approximately 95% at full opacity

Ideal For

• Electronic shutter and reveal effects
• Variable-opacity windows and displays
• Art installations and interactive projects