Patent application number | Description | Published |
20080232135 | Light guide - A light guide includes an extractor layer and a substrate layer. Each layer has a first major surface and a second major surface. The second major surface of the extractor layer is in contact with the first major surface of the substrate layer, and the first major surface of the extractor layer has a plurality of discrete light extractors capable of extracting light propagating in the light guide such that light is extracted in a predetermined pattern over the first major surface of the extractor layer. In some embodiments, at least one of the extractor layer or substrate layer is flexible. | 09-25-2008 |
20080247065 | METHOD OF MAKING STRUCTURED OPTICAL FILMS - Methods for fabricating an optical film characterizable by a relationship between gain and thickness to prism pitch ratio (S/p) that varies cyclically are described. The thickness and the prism pitch of the optical film are selected based on the relationship between gain and S/p ratio, to obtain a desired gain. The optical film is formed having the S/p ratio that provides the desired gain. | 10-09-2008 |
20090284836 | LIGHT CONTROL FILM WITH OFF-AXIS VISIBLE INDICIA - In one aspect, the invention provides a light control film having an indicium visible at a range of viewing angles. The light control film comprises a light input surface and a light output surface opposite the light input surface. The control film further comprises alternating transmissive and absorptive regions disposed between the light input surface and the light output surface. Each absorptive region has a height and a length, wherein the heights of the absorptive regions corresponding to the indicium are different that the heights of the absorptive regions that surround the absorptive regions corresponding to indicium. | 11-19-2009 |
20100135004 | BACK-LIT DISPLAYS WITH HIGH ILLUMINATION UNIFORMITY - A directly illuminated display unit includes a display panel and one or more light sources disposed behind the display panel. The light sources are capable of producing illumination light. A diffusive light diverting layer is disposed between the one or more light sources and the display panel. The light diverting layer comprises first light diverting elements disposed on one of a first side of the light diverting layer facing display panel and second light diverting elements disposed on a second side of the light diverting layer facing away from the display panel. The diffusive light diverting layer further comprises diffusing particles disposed within a polymeric matrix. | 06-03-2010 |
20110001901 | DUAL LIGHTGUIDE - A backlight subsystem includes first and second lightguides separated by an interfacial layer. The first lightguide has an output surface oriented toward an associated first illumination field, a back surface, and at least one light input edge. The second lightguide has output surface oriented toward an associated second illumination field, a back surface, and at least one light input edge. An interfacial layer is arranged between the back surfaces of the first lightguide and the second lightguide. The interfacial layer is substantially optically non-absorbing and may be predominately optically transmissive or predominately optically reflective. | 01-06-2011 |
20110032727 | BACKLIGHT REFLECTORS HAVING A PRISMATIC STRUCTURE - A back reflector for a lightguide in a turning film backlight includes a prism film layer in direct contact with a reflective layer. The lightguide includes a light guiding region having a refractive index that is substantially spatially uniform. The reflective layer may be specular or diffuse and may include a multilayer polymeric film. | 02-10-2011 |
20110261584 | SYSTEMS AND METHODS FOR CONTROLLING BACKLIGHT OUTPUT CHARACTERISTICS - A backlight includes a light source and one or more light recycling films. The light source generates light that exits the light source with an angular exit distribution. The light recycling films are oriented in relation to the light source so that the prism peaks of the recycling films are oriented away from the light source. The recycling films have a range of optimal incident angles that allow light to pass through the recycling films without recycling. The components of the light source, the characteristics of the recycling films, or both, are configured to control the overlap between the exit distribution of the light source and the optimal incident angle range of the recycling films. | 10-27-2011 |
20110310332 | SIMPLIFIED EDGE-LIT BACKLIGHT SYSTEM - A backlight system includes an extended area light guide ( | 12-22-2011 |
20120064296 | ANTIGLARE FILMS COMPRISING MICROSTRUCTURED SURFACE - The present invention concerns antiglare films having a microstructured surface. | 03-15-2012 |
20120113622 | LIGHT REDIRECTING FILM AND DISPLAY SYSTEM INCORPORATING SAME - A light redirecting film ( | 05-10-2012 |
20120140518 | LIGHTGUIDE - Flexible unitary lightguide and a method of making the same are disclosed. The lightguide includes a structured input side that includes a first pattern having smaller features superimposed on a second pattern having larger features. The lightguide further includes a structured top surface that includes a first region and a different second region. The first region includes a plurality of discrete light extractors for extracting light that propagates within the flexible unitary lightguide by total internal reflection. The second region includes a taper portion for directing light from the structured input side to the first region. The light extractors form a periodic array that has a first period along the length of the flexible unitary lightguide. The first period is such that substantially no visible moir fringes occur when the flexible unitary lightguide is used as a backlight in a pixelated display. | 06-07-2012 |
20120147593 | LIGHT REDIRECTING FILM AND DISPLAY SYSTEM INCORPORATING SAME - Light redirecting film is disclosed. The light redirecting film includes a first major surface that includes a plurality of first microstructures that extend along a first direction. The light redirecting film also includes a second major surface that is opposite to the first major surface and includes a plurality of second microstructures. The second major surface has an optical haze that is in a range from about 4% to about 20% and an optical clarity that is in a range from about 20% to about 60%. The light redirecting film has an average effective transmission that is not less than about 1.55. | 06-14-2012 |
20120268967 | LIGHT GUIDES - Lightguides are disclosed. More particularly, lightguides that include a lightguiding layer and a light extracting layer having a structured surface are disclosed. The light guiding layer is optically coupled to a first set of structures of the structured surface at given locations, and is not optically coupled to a second set of structures at given locations, thereby producing total internal reflection at the second locations. The selective optical coupling may be achieved by a number of different contemplated means as discussed herein. The lightguides allow for distribution of light along with redirection towards an image viewer without a number of commonly required optical elements in backlights. | 10-25-2012 |
20130004728 | OPTICAL STACK - Optical stack is disclosed. The optical stack includes a light redirecting film that includes a first structured major surface that includes a plurality of unitary discrete structures. The optical stack also includes an optical adhesive layer that is disposed on the light directing film. At least portions of at least some unitary discrete structures in the plurality of unitary discrete structures penetrate into the optical adhesive layer. At least portions of at least some unitary discrete structures in the plurality of unitary discrete structures do not penetrate into the optical adhesive layer. The peel strength of the light redirecting film and the optical adhesive layer is greater than about 30 grams/inch. The average effective transmission of the optical stack is not less or is less than by no more than about 10% as compared to an optical stack that has the same construction except that no unitary discrete structure penetrates into the optical adhesive layer. | 01-03-2013 |
20130070341 | LIGHT REDIRECTING FILM AND DISPLAY SYSTEM INCORPORATING SAME - Optical films for redirecting light are described, and optical systems, such as display systems, incorporating such optical films are described. | 03-21-2013 |
20130321910 | HIGH ANGLE REAR PROJECTION SYSTEM - A system for projecting content at an angle to a rear projection screen. The system includes a projector configured for projecting changeable electronic content and a rear projection screen for receiving the projected content at an angle and displaying the projected content. The rear projection screen includes a turning film having prisms facing toward or away from the projector. For prisms facing toward the projector, a protective film covers the turning film. When the projected content is displayed on the rear projection screen, the content has a substantially uniform appearance. | 12-05-2013 |
20140104871 | LIGHT MANAGEMENT FILM - Example light management films including a plurality of tapered protrusions are described. In some examples, the disclosure relates to a film comprising a reflective polarizer layer and a plurality of tapered protrusions disposed on and tapering away from the reflective polarizer layer, where the tapered protrusions include at least one of a plurality of substantially conical shaped protrusions or a plurality of pyramidal shaped protrusions including at least four side faces. The plurality of tapered protrusions may be configured to reduce the divergence of incident light and redirect a majority of incident light propagating along a first direction to a second direction different from the first direction. | 04-17-2014 |
20140168766 | OPTICAL ASSEMBLY - An optical assembly includes a light directing film having an average effective transmission of at least 1.3, a light diffusing film having an optical haze of at least 5% and a plurality of spaced apart posts disposed and defining an air gap between the light directing and diffusing films. The posts are attached to a first major surface of the substrate and an opposing second end of each post is attached to the light diffusing film via a first adhesive layer. The first adhesive layer forms a meniscus at each post having an outer surface radius of at least 0.5 micrometers. | 06-19-2014 |
20140232960 | ELECTRONICALLY SWITCHABLE PRIVACY FILM AND DISPLAY DEVICE HAVING SAME - An electronically switchable privacy films suitable for use in display devices are described. The electronically switchable privacy film comprises a pair of mutually opposing transparent electrodes; an optically transparent microstructured layer disposed between the transparent electrodes, the microstructured layer comprising a plurality of microstructured ribs extending across a surface thereof such that the microstructured ribs form an alternating series of ribs and channels; and electronically switchable material disposed in the channels, the electronically switchable material being capable of modulation between high and low absorption states upon application of an electric field across the transparent electrodes. | 08-21-2014 |
20140285912 | APPROACHES TO CONTROL COLOR MURA IN OPTICAL FILMS - A brightness enhancement film includes a plurality of linear prisms disposed on a birefringent substrate. A light ray that enters the film from the substrate side and exits the film from the linear prisms side undergoes substantially a same phase retardation for mutually orthogonal polarization states while travelling within the film. The light ray exits the film at an angle from a normal to the substrate that is greater than 20 degrees. | 09-25-2014 |
20140313587 | LIGHT REDIRECTING FILM AND DISPLAY SYSTEM INCORPORATING SAME - Light redirecting film is disclosed. The light redirecting film includes a first major surface that includes a plurality of first microstructures that extend along a first direction. The light redirecting film also includes a second major surface that is opposite to the first major surface and includes a plurality of second microstructures. The second major surface has an optical haze that is not greater than about 3% and an optical clarity that is not greater than about 85%. The light redirecting film has an average effective transmission that is not less than about 1.75. | 10-23-2014 |
20140355125 | OPTICAL FILM STACK - Example light management films are described. In one example, an optical stack comprises a first light directing film comprising a structured major surface opposite a second major surface, the structured major surface comprising a plurality of linear structures extending along a first direction, the light directing film having an average effective transmission of at least 1.3; and an asymmetric light diffuser disposed on the light directing film and being more diffusive along a second direction and less diffusive along a third direction orthogonal to the second direction, the second direction making an angle with the first direction that is greater than zero and less than 60 degrees. | 12-04-2014 |
20140375929 | LIGHT MANAGEMENT FILM - Example light management films including a plurality of tapered protrusions are described. In many embodiments, a film includes a reflective polarizer layer and a plurality of tapered protrusions disposed on and tapering away from the reflective polarizer layer. At least one tapered protrusion in the plurality of tapered protrusions has a first lateral cross-section at a first location along a height of the tapered protrusion and a second lateral cross-section at a second location along the height of the tapered protrusion. The first cross-section has a first shape and the second cross-section has a different second shape. | 12-25-2014 |
20150061167 | LIGHTGUIDE - Flexible unitary lightguide and a method of making the same are disclosed. The lightguide includes a structured input side that includes a first pattern having smaller features superimposed on a second pattern having larger features. The lightguide further includes a structured top surface that includes a first region and a different second region. The first region includes a plurality of discrete light extractors for extracting light that propagates within the flexible unitary lightguide by total internal reflection. The second region includes a taper portion for directing light from the structured input side to the first region. The light extractors form a periodic array that has a first period along the length of the flexible unitary lightguide. The first period is such that substantially no visible moire fringes occur when the flexible unitary lightguide is used as a backlight in a pixelated display. | 03-05-2015 |
Patent application number | Description | Published |
20090166433 | TRANSACTION CARD WITH ENCLOSED CHAMBER - A transaction card includes a chambered member, a cover substrate and an account identifier. The chambered member defines a rear surface, a front surface and a chamber extending from the front surface toward the rear surface. The front surface and the rear surface are sized similarly to each other. The cover substrate defines a first surface, which is securely coupled to the front surface to enclose the chamber, and a window aligned with the chamber. The window is one of translucent and transparent such that at least a portion of the chamber is viewable through the window. The account identifier is connected to the chambered member and links the transaction card to at least one of an account and a record. Other embodiments, stored-value cards and associated methods are also disclosed. | 07-02-2009 |
20090294528 | STORED-VALUE CARD WITH EMBOSSED INDICIA - A transaction card includes a substrate having embossed indicia configured, for example, to emulate a license plate. The substrate defines a first surface and a second surface, wherein the first surface is opposite the first surface. The substrate includes embossed indicia defined by regions projecting in relief with respect to the first surface and/or the second surface. The embossed indicia may, for example, emulate a license plate or the like. The substrate further includes an account identifier linking the transaction card to at least one of an account and a record. Stored-value cards, methods of providing a stored-value card, and other embodiments of stored-value or transaction cards and associated combinations are also disclosed. | 12-03-2009 |
20090308931 | CAKE TOPPER TRANSACTION PRODUCT - A transaction product for use as a cake topper includes a body portion, an auxiliary portion and a machine readable account identifier. The body portion defines a support member and a flange extending from the support member. The flange is configured for placement into a frosting layer on a cake. The body portion defines a first part of a character. The auxiliary portion is formed separately from the body portion and defines a second part of the character. The auxiliary portion defines a lip configured for placement into the frosting layer on the cake. The account identifier is coupled to at least one of the body portion and the auxiliary portion and links the transaction product to an account or record for tracking a value associated with the transaction product. Other cards, products, assemblies and methods of encouraging use of such cards, products and assemblies are also disclosed. | 12-17-2009 |