What it is
A lens with an electroactive layer whose transmission can be darkened or cleared by applying a voltage.
How it works
Applying current drives an electrochemical or liquid-crystal change that absorbs more visible light.
Why it matters
Electronic tint works behind car windscreens, changes in under a second and can be tied to AR display contrast.
Advantages
- Fast switching
- Works without UV
- User controllable
Current limitations
- Requires power
- Limited tint range in thin lenses
- Added lens thickness
Commercial readiness
Shipping in niche eyewear and demonstrated in smart glasses prototypes.
Development timeline
2024
Electronic tint appears in consumer smart eyewear demonstrations