Patent application number | Description | Published |
20090305002 | PHOTOCHROMIC DEVICES AND METHODS FOR MAKING THE SAME - A mixture used in photochromic devices comprises a photochromic dye and a thermoset adhesive. An optical device using the mixture may include a carrier substrate which may then be secured to another substrate or a lens. Assembly of the carrier substrate and mixture to another substrate and/or lens may be accomplished by thermoforming, lamination, insert molding or the like. | 12-10-2009 |
20100202033 | 3H-NAPHTH0 [2,1-B] PYRANS AS PHOTOCHROMIC DICHROIC DYES AND OPTICAL ARTICLE CONTAINING THEM - A naphthopyran compound represented by the formula (I): | 08-12-2010 |
20100324296 | DICHROIC-PHOTOCHROMIC COMPOUNDS AND DEVICES - A naphthopyran compound represented by the formula | 12-23-2010 |
20130248350 | PHOTOTROPIC LIQUID CRYSTAL MATERIAL AND PROCESSES - A new class of phototropic liquid crystal mixture comprises a liquid crystal host and one or more photodichroic dyes, wherein exposure of the mixture to an activating light causes a light-induced increase in order parameter of the mixture. In some examples, in the absence of the activating light, the phototropic mixture has a lower order parameter than the liquid crystal host, while in the presence of activating light, the phototropic mixture has a higher order parameter than the liquid crystal host. In some examples, upon exposure to the activating light, the phototropic mixture undergoes a phase transition from a material with a lower order to a material with higher liquid crystalline order. In some examples, activating light causes the mixture to transition from an isotropic phase to a nematic phase, from an isotropic phase to a cholesteric phase or form a nematic phase to a smectic phase. | 09-26-2013 |
20130258266 | WIDE BAND VARIABLE TRANSMITTANCE OPTICAL DEVICE AND MIXTURE - We describe a wide band variable transmission optical device, mixtures for use in such a device, and methods of making the same. The wide band optical device includes a cell comprising a guest-host mixture of a liquid crystal host and a dichroic guest dye material contained between a pair of plastic substrates. The optical device does not use polarizers. The liquid crystal host has an axis orientation that is alterable between a clear state orientation and a dark state orientation perpendicular thereto and the dichroic guest dye material includes one or more dichroic dyes. The optical device is characterized in that it exhibits a wide absorption band that is greater than 175nm within a visible wavelength range of 400-700nm and has a clear state transmission equal to or above 30% and a dark state transmission equal to or below 40%. | 10-03-2013 |
20140197361 | DICHROIC-PHOTOCHROMIC 2H-NAPHTHO[1,2-b]PYRAN COMPOUNDS AND DEVICES - A naphthopyran compound represented by the formula | 07-17-2014 |
20140320776 | ADAPTIVE LIQUID CRYSTAL STRUCTURAL INTERFACE - A structural interface having an adaptive liquid crystal material that is positioned to receive electromagnetic radiation and adapted to reflect a selective band of the received electromagnetic radiation so as to help with cooling of a structure in the summer and/or heating of the structure in the winter. The adaptive liquid crystal material is designed to change its selective reflection band when exposed to an activating temperature or an activating light or both. Depending on the interior and/or exterior conditions, the adaptive liquid crystal material has one or more selective reflection bands with a peak wavelength selected from the following: within a sunlight wavelength span, outside a thermal infrared wavelength span, outside the sunlight wavelength span, or within the thermal infrared wavelength span. The structural interface may be applied to an exterior or interior surface of a structural envelop or be integrated into a structural envelope material. | 10-30-2014 |
20160070132 | WIDE BAND VARIABLE TRANSMITTANCE OPTICAL DEVICE - We describe a wide band variable transmission optical device having an electronically active cell comprising a guest-host mixture of a liquid crystal host and a dichroic guest dye material contained between a pair of plastic substrates. The liquid crystal host has an axis orientation that is alterable between a clear state orientation and a dark state orientation and the dichroic guest dye material includes one or more dichroic dyes. The optical device is characterized in that it exhibits a wide absorption band that is greater than 175 nm within a visible wavelength range of 400-700 nm, has a clear state transmission equal to or above 30% and a dark state transmission equal to or below 40%. | 03-10-2016 |