Patent ID: 9513524
Filing Date: 2016-12-06
CPC Classification: G02C,G02F

Claim Text:
1. An optical device comprising: an electronically active cell comprising a guest-host mixture of a liquid crystal host and a guest dye material comprising one or more dichroic dyes, contained between a pair of plastic substrates, wherein the guest-host mixture has an axis orientation that is alterable between a clear state orientation and a dark state orientation perpendicular thereto; wherein said guest-host mixture has an order parameter, S wherein said pair of plastic substrates have an optical retardation with less than ±20% variation in uniformity for any given wavelength of incident light; wherein said optical device further comprises an electronically passive layer for further reducing the transmission of light through said optical device; wherein said optical device exhibits a wide absorption band having an aggregate full width at half maximum (A-FWHF) that is greater than 175 nm within a visible wavelength range of 400-700 nm; and wherein said optical device has a variable transmission with a dark state transmission equal to or below 40% and a transmission swing between the clear state orientation and the dark state orientation greater than or equal to 30%.