Patent application number | Description | Published |
20080260328 | LED LIGHT EXTRACTION BAR AND INJECTION OPTIC FOR THIN LIGHTGUIDE - An optical system for back-illuminating a display has a lightguide having a confinement direction and a first plurality of light sources disposed proximate a first edge of the lightguide. Light from at least one of the light sources defines an emission axis which is approximately parallel to the confinement direction. A solid light injector is disposed to couple light from the light sources into the lightguide. A surface of the light injector may be shaped as a confinement curve for confining light from the first plurality of light sources in the confinement direction by total internal reflection. In some embodiments a portion of the illumination light from the one or more light sources enters the first light injector along a direction having a component directed away from the lightguide and is totally internally reflected within the injector. | 10-23-2008 |
20080260329 | LIGHTGUIDES HAVING CURVED LIGHT INJECTORS - An optical system has a lightguide having a confinement direction and a first light source disposed proximate a periphery of the lightguide. A light injector is disposed to couple light from the first light source into the lightguide. The light injector has a surface formed with a confinement curve for confining light in the confinement direction. The light injector may be disposed at either a recess on the periphery of the lightguide or at a cut corner of the lightguide. A refractive structure, having at least one surface non-perpendicular to an emission axis of the light source may be disposed between the injector and the lightguide. At least a portion of the injector may have a shape corresponding to a confinement curve that is rotated about an axis parallel to the confinement direction. | 10-23-2008 |
20090067048 | STRUCTURED ORIENTED FILMS FOR USE IN DISPLAYS - Films having a structured surface with an engineered feature, such as prism grooves, to be used in displays having a backlight. The films can be arranged in a stack having one or more of the following: birefringent brightness enhancement films, non-birefringent brightness enhancement films, polarizers, diffusers, birefringent turning films, and non-birefringent turning films. Those films can be arranged in any order from the backlight to a viewer. | 03-12-2009 |
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 |
20100188754 | LIQUID CRYSTAL DISPLAYS WITH LAMINATED DIFFUSER PLATES - In a liquid crystal display (LCD), for example an LCD monitor or an LCD-TV, a number of light management films, including a diffuser layer, lie between the light source and the LCD panel to provide bright, uniform illumination. In some embodiments, the diffuser layer is attached to the lower side of the LCD panel. Some, or all, of the light management layers may be attached together as a laminated stack of films. In some embodiments, the diffuser layer is formed with a recessed region on one side and another optical film positioned within the recessed region. | 07-29-2010 |
20110037736 | BRIGHTNESS ENHANCING FILM AND FILM BASED DIFFUSER FOR IMPROVED ILLUMINATION UNIFORMITY OF DISPLAYS - An optical device has a first film ( | 02-17-2011 |
20110051047 | HOLLOW BACKLIGHT WITH STRUCTURED FILMS - A backlight ( | 03-03-2011 |
20110134659 | HOLLOW BACKLIGHT WITH TILTED LIGHT SOURCE - In one embodiment, the invention provides backlight comprising a front reflector ( | 06-09-2011 |
20110249446 | OPTICAL ELEMENT FOR LATERAL LIGHT SPREADING IN EDGE-LIT DISPLAYS AND SYSTEM USING SAME - An illumination light unit has at least one light source that generates illumination light. The unit also includes a reflecting cavity having one or more reflectors and a controlled transmission mirror disposed at an output of the reflecting cavity. The controlled transmission mirror includes an input coupling element, an output coupling element and a first multilayer reflector disposed between the input and output coupling elements. At least some of the illumination light is reflected within the reflecting cavity by the one or more reflectors and is transmitted out of the reflecting cavity through the controlled transmission mirror. The illumination light unit may be used for generating light for space lighting, or for illuminating a display. For example, the unit may be used in a backlight to illuminate a lightguide placed behind a display panel. | 10-13-2011 |
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 |
20120020107 | LIGHTING SYSTEM AND LIGHT INJECTION COUPLER THEREFOR - A lighting system has one or more light guides capable of guiding light, each comprising a core and two optically smooth faces. A cavity adjacent to two of the optically smooth faces has an opening and a reflective-transmissive surface opposite the opening. A cover having a light source is proximate to and occludes the opening. A major portion of any light emitted from the light source is reflected by the reflective-transmissive surface of the cavity and is injected into the light guides, and a minor portion of any light emitted by the light source is transmitted through the reflective-transmissive surfaces of the cavity and emitted from the lighting system. A light injection coupler is also disclosed that has an optically transmissive housing and suitable for use to couple ends of at least one light guide thereby making a lighting system. | 01-26-2012 |
20130335823 | Optical Film Stack - Optical film stacks are disclosed. The optical film stacks can include a first reflective polarizer, a second reflective polarizer, and a retardance layer disposed between the first reflective polarizer and the second reflective polarizer. | 12-19-2013 |
Patent application number | Description | Published |
20100128351 | CURVED SIDED CONE STRUCTURES FOR CONTROLLING GAIN AND VIEWING ANGLE IN AN OPTICAL FILM - A method of making an optical film includes the steps of making a substrate having a first major surface and a second major surface opposite the first surface and forming a plurality of curved sided cone structures on the first surface. Each of the curved sided cone structures include a base located on the first surface, a vertex, and a curved side formed from an arc extending between the base and the vertex. The optical gain and viewing angle for the film can be controlled by adjusting angles representing a shape of each curved sided cone structure at its vertex and base. | 05-27-2010 |
20100214506 | HIGHER TRANSMISSION LIGHT CONTROL FILM - A light control film, and light collimating assemblies and liquid crystal displays incorporating such light control films are described. The light control film includes alternating transmissive and absorptive regions, where the refractive index of each transmissive region is greater than the refractive index of each absorptive region. The absorptive regions form interfaces at angles that are close to the perpendicular to the light control film. A portion of the incident light intercepting the absorptive region undergoes Total Internal Reflection, and is transmitted through the film. The axial brightness of light passing through the film is increased, the brightness is more uniform within the viewing angle, and the viewing cutoff angle is sharpened. | 08-26-2010 |
20110267799 | LED Array Systems - A light emitting diode (LED) array comprises an array of LEDs mounted to a substrate. The LEDs emit light in a direction generally perpendicular to the substrate. An optical sheet is disposed over the LEDs. At least a portion of light entering one side of the optical sheet from the LEDs is guided within the optical sheet in a direction generally parallel to the substrate. Light extraction features direct light from the optical sheet in a generally forward direction. Such an array is useful for several applications, including space lighting, direct information display and backlighting of liquid crystal displays. The light spreading effect of the optical sheet reduces the amount of black space between LED pixels. | 11-03-2011 |
20120327297 | DISPLAY SYSTEM AND METHOD FOR PROJECTION ONTO NON-PLANAR SURFACES - A system for projecting changeable electronic content, such as video or digital still images, onto a curved surface. The system includes a housing, a reflector within the housing, and a projector. The housing has an exterior surface and an interior space. At least a portion of the exterior surface is a curved display surface capable of displaying electronic content projected upon it, and at least one portion of the exterior surface has an aperture through the exterior surface to the interior space. The projector is located proximate the aperture for projecting content through the aperture to the reflector. When the projector receives converted content and projects the converted content through the aperture to the reflector, the curved display surface displays the converted content undistorted to a viewer. The system can also provide for display of branded content on a product container having a shape corresponding with the brand. | 12-27-2012 |