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US 10,481,424 B2Granted
Glass panel comprising a liquid crystal film
AssigneeAgc Glass Europe
InventorJonathan Vivier
Life of this patent
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Abstract
A laminated automotive glazing including a PDLC film powered electrically by an AC current or a frequency lower than 100 Hz. The voltage varies non-sinusoidally, and a maximum of an effective voltage does not exceed 80 Vrms.
Claims18
A laminated automotive glazing comprising:
- a PDLC film powered electrically by an AC current having a frequency of from 20 Hz to less than 50 Hz, a voltage varying non-sinusoidally, a maximum of an effective voltage not exceeding 55 Vrms,
- wherein a residual scattering in an actuated state is no higher than 5% for a temperature not exceeding 50° C., and
- wherein power required to obtain the actuated state is no higher than 10 W/m2 of PDLC film.
An automotive roof comprising:
- two glass sheets;
- a first interlayer sheet;
- and
- a PDLC film powered electrically by an AC current having a frequency of from 20 Hz to less than 50 Hz, a voltage varying non-sinusoidally, and a maximum of an effective voltage not exceeding 50 Vrms,
- wherein a residual scattering in an actuated state is no higher than 5% for a temperature not exceeding 50° C., and
- wherein power required to obtain the actuated state is no higher than 10 W/m2 of PDLC film.
3 more elements
Dependencies are inferred from the claim text.