Patent application number | Description | Published |
20090185129 | BISTABLE FERROELECTRIC LIQUID CRYSTAL DEVICES - A liquid crystal electro-optic device. The liquid crystal electro-optic device comprises at least one liquid crystal cell comprising: a pair of substrates having a gap therebetween; a pair of electrodes, the pair of electrodes positioned on one of the substrates or one electrode positioned on each substrate; and a ferroelectric, oligosiloxane liquid crystal material disposed in the gap between the pair of substrates, the ferroelectric, oligosiloxane liquid crystal material exhibiting an I-♦ SmC* phase sequence wherein the liquid crystal electro-optic device is bistable in operation. The invention also involves a method for making a liquid crystal electro-optic device. | 07-23-2009 |
20100283925 | OLIGOSILOXANE MODIFIED LIQUID CRYSTAL FORMULATIONS AND DEVICES USING SAME - A liquid crystal formulation is described. The liquid crystal formulation comprises a first oligosiloxane-modified nano-phase segregating liquid crystalline material; and at least one additional material selected from a second oligosiloxane-modified nano-phase segregating liquid crystalline material, non-liquid crystalline oligosiloxane-modified materials, organic liquid crystalline materials, or non-liquid crystalline materials, wherein the liquid crystal formulation has an I→SmA*→SmC* phase transition, with a SmC* temperature range from about 15° C. to about 35° C., a tilt angle of about 22.5°±6° or about 45°±6°, a spontaneous polarization of less than about 50 nC/cm2., and a rotational viscosity of less than about 600 cP. Devices containing liquid crystal formulations are also described. The device has a stable bookshelf geometry, bistable switching, and isothermal electric field alignment, a response time of less than 500 μs when switched between two stable states, and an electric drive field of less than about 30 V/μm. | 11-11-2010 |
20100283927 | OLIGOSILOXANE MODIFIED LIQUID CRYSTAL FORMULATIONS AND DEVICES USING SAME - A liquid crystal formulation is described. The liquid crystal formulation comprises a first oligosiloxane-modified nano-phase segregating liquid crystalline material; and at least one additional material selected from a second oligosiloxane-modified nano-phase segregating liquid crystalline material, non-liquid crystalline oligosiloxane-modified materials, organic liquid crystalline materials, or organic non-liquid crystalline materials, wherein the liquid crystal formulation is nano-phase segregated in the SmC* phase, has an I→SmC* phase transition, with a SmC* temperature range from about 15° C. to about 35° C., has a tilt angle of about 22.5°±6° or about 45°±6°, and has a spontaneous polarization of less than about 50 nC/cm2, and a rotational viscosity of less than about 600 cP. Devices containing liquid crystal formulations are also described. The device has a stable bookshelf geometry, bistable switching, and isothermal electric field alignment, a response time of less than 500 μs when switched between two stable states, and an electric drive field of less than about 30 V/μm. | 11-11-2010 |
20130155340 | Liquid Crystal Formulations And Structures For Smectic A Optical Devices - The present, invention relates to liquid crystal compositions having a smectic A structure for use in an optical device in which the composition is sandwiched between a pair of electrodes ( | 06-20-2013 |
20150049267 | Optical Device - In a method of operating a liquid crystal device having a liquid crystal composition with smectic-A properties, a first waveform is applied to optically clear the device so that it is substantially transparent to visible light and a second waveform is applied to disorder the material of the liquid crystal composition to afford a strongly light-scattering state. The first waveform has a higher frequency than the second, waveform, and the method comprises applying a modified waveform to partially clear at least a portion of the device from the light-scattering state | 02-19-2015 |
Patent application number | Description | Published |
20090142486 | RETROREFLECTIVE SHEETING WITH SECURITY AND/OR DECORATIVE IMAGE - The present invention provides a retroreflective sheet with a discernable image. The retroreflective sheet comprises a transparent polymeric spacing layer having a first surface and a second surface; a layer of transparent microsphere lenses embedded into the first surface of the spacing layer at varying depths forming an image, wherein the spacing layer adheres to and conforms to the microspheres; and a reflective layer adhered to the second surface of the spacing layer. The present invention also provides methods for preparing such retroreflective sheet. | 06-04-2009 |
20100215885 | ADHESIVE ARTICLES WITH IMPROVED AIR EGRESS - This invention relates to an adhesive article which provides air egress. Air egress is provided by supplying a route, such as areas of no initial adhesion for the air to flow out from under the construction. The invention relates to an adhesive article comprising a facestock having a front surface and a back surface, a continuous layer of adhesive having an upper surface and a lower surface wherein the upper surface of the adhesive layer is adhered to the back surface of the facestock, and a plurality of spaced-apart non-adhesive material which is in contact with the lower surface of the adhesive layer. These articles have usefulness as industrial graphics images, as well as decorative coverings, etc. The articles provide air egress and optionally repositionability and slideability. | 08-26-2010 |
20110211257 | Retroreflective Article - A retroreflective article includes a prismatic film having prismatic elements with a metallized coating wherein the metallized coating is laser etched to provide one or more light transmissive regions to expose underlying material that one or more provides high contrast images that contrast with the retroreflective film. The underlying material can include one or more contrasting elements. The article may be back-lighted to increase the contrast especially during conditions of reduced lighting. | 09-01-2011 |
20120040152 | ADHESIVE ARTICLES WITH IMPROVED AIR EGRESS - This invention relates to an adhesive article which provides air egress. Air egress is provided by supplying a route, such as areas of no initial adhesion for the air to flow out from under the construction. The invention relates to an adhesive article comprising a facestock having a front surface and a back surface, a continuous layer of adhesive having an upper surface and a lower surface wherein the upper surface of the adhesive layer is adhered to the back surface of the facestock, and a plurality of spaced-apart non-adhesive material which is in contact with the lower surface of the adhesive layer. These articles have usefulness as industrial graphics images, as well as decorative coverings, etc. The articles provide air egress and optionally repositionability and slideability. | 02-16-2012 |
20130071589 | Embossed Thermoplastic Label - An embossed thermoplastic label includes (a) a facestock having an upper surface and a lower surface with at least one layer and the layer has at least one thermoplastic resin, and (b) the facestock includes at least one embossed pattern on the upper surface of the facestock. The embossed pattern includes at least one embossed section and at least one unembossed section on the facestock. An intermediate configuration is also disclosed. A method is provided for embossing a thermoplastic label. The embossed thermoplastic label is useful in various labeling and brand awareness applications and provides visual and textural effects. | 03-21-2013 |
20130120847 | Discontinuous or Variable Thickness Gain Modification Coating for Projection Film and Method for Making Same - The present invention relates to projection films and methods of making the same. In particular, the present invention relates to a projection film whereby the microspheres exhibit improved alignment on the light exit surface and have alignment on the light entrance surface that varies according to the individual microsphere diameter. In another embodiment, the present invention relates to a projection film that has the attributes of variable gain within the single projection film. In another embodiment, the present invention relates to an exposed microsphere projection film construction that provides modification of the head-on and angular pattern of light transmission (gain). | 05-16-2013 |
Patent application number | Description | Published |
20080304149 | DISCONTINUOUS OR VARIABLE THICKNESS GAIN MODIFICATION COATING FOR PROJECTION FILM AND METHOD FOR MAKING SAME - The present invention relates to projection films and methods of making the same. In particular, the present invention relates to a projection film whereby the microspheres exhibit improved alignment on the light exit surface and have alignment on the light entrance surface that varies according to the individual microsphere diameter. In another embodiment, the present invention relates to a projection film that has the attributes of variable gain within the single projection film. In another embodiment, the present invention relates to an exposed microsphere projection film construction that provides modification of the head-on and angular pattern of light transmission (gain). | 12-11-2008 |
20090053449 | ADHESIVE ARTICLE HAVING IMPROVED APPLICATION PROPERTIES - An adhesive article and a method of making the adhesive article are described. The adhesive article includes a facestock film having a first surface, a second surface and end edges wherein the second surface has a plurality of recesses formed therein that provide a path for fluid egress to at least one end edge; and a continuous layer of adhesive adhered to the second surface of the facestock film. The adhesive layer can compress, collapse or flex into the recesses of the embossed surface in response to a force to create a path for fluid egress. | 02-26-2009 |
20100124632 | THERMOFORMABLE THREE DIMENSIONAL RETROREFLECTIVE ARTICLE AND METHOD OF MANUFACTURE - A three dimensional retroreflective article having an outer surface with a reflectivity of at least about 200 lux, and method for making such an article from a thermoformable laminate is provided. The laminate includes a base layer of thermoformable plastic sheet material; and a layer of microbeads configured in a high-density arrangement and silvered on their bottom sides to enhance retroreflectivity. The microbeads are adhered to an outer surface of the base layer by a thermoformable cushion coat which may include a phosphorescent pigment to further enhance reflectivity. A protective sheet of transparent thermoformable sheet material overlies and may be in contact with the layer of microbeads. The laminate is heated and thermoformed into a self supporting three dimensional article having a pre-selected shape and an encapsulated bead retroreflective surface having a reflectivity of at least about 200 lux. The thermoforming step imparts sufficient non-planarity in the resulting retroreflective surface so that retroreflective dead spots created by contact between the microbeads and the protective sheet of transparent sheet material are effectively optically cancelled by overlapping zones of retroreflectivity generated by the microbeads. | 05-20-2010 |
20100202045 | DISCONTINUOUS OR VARIABLE THICKNESS GAIN MODIFICATION COATING FOR PROJECTION FILM AND METHOD FOR MAKING SAME - The present invention relates to projection films and methods of making the same. In particular, the present invention relates to a projection film whereby the microspheres exhibit improved alignment on the light exit surface and have alignment on the light entrance surface that varies according to the individual microsphere diameter. In another embodiment, the present invention relates to a projection film that has the attributes of variable gain within the single projection film. In another embodiment, the present invention relates to an exposed microsphere projection film construction that provides modification of the head-on and angular pattern of light transmission (gain). | 08-12-2010 |
20110132530 | Adhesive Articles with Improved Air Egress and Methods of Making the Same - Methods of making adhesive articles providing air egress by supplying a route for the air to flow out from under the construction are described. One method includes providing a release liner comprising a moldable layer having a release surface and a back surface; applying a first pattern of a first non-adhesive material to a first portion of the release surface; applying a second pattern of a second non-adhesive material to a second portion of the release surface, wherein the second pattern partially overlaps the first pattern; embedding at least one of the first or second non-adhesive materials into the moldable layer; and transferring an adhesive layer having a front and back surface and end edges onto the release liner, wherein the front surface of the adhesive layer is adhered to the release surface of the release liner. | 06-09-2011 |
20110132531 | Adhesive Articles with Improved Air Egress and Methods of Making the Same - Methods of making adhesive articles providing air egress by supplying a route for the air to flow out from under the construction are described. One method includes providing a release liner comprising a moldable layer having a release surface and a back surface; applying a first pattern of a first non-adhesive material to a first portion of the release surface; applying a second pattern of a second non-adhesive material to a second portion of the release surface, wherein the second pattern partially overlaps the first pattern; embedding at least one of the first or second non-adhesive materials into the moldable layer; and transferring an adhesive layer having a front and back surface and end edges onto the release liner, wherein the front surface of the adhesive layer is adhered to the release surface of the release liner. | 06-09-2011 |