Patent application number | Description | Published |
20100238686 | RECYCLING BACKLIGHTS WITH SEMI-SPECULAR COMPONENTS - A hollow light-recycling backlight has a “semi-specular” component providing a balance of specularly and diffusely reflected light improving the uniformity of the light output. The component may be arranged on the reflectors ( | 09-23-2010 |
20100271819 | LIGHTING ASSEMBLIES AND SYSTEMS - The present disclosure relates to illumination or lighting assemblies and systems that provide illumination using LEDs. In one aspect, the present disclosure provides a lighting assembly, comprising: multiple light emitting diodes that emit light; an optical system that directs the light emitted by the light emitting diodes, the optical system positioned adjacent to light emitting diodes; and a cooling fin including a two-phase cooling system, the cooling fin positioned adjacent to the light emitting diodes such that the two-phase cooling system removes heat from the light emitting diodes. In another aspect, the present disclosure provides a lighting system including multiple lighting assemblies. The lighting assemblies and systems of the present disclosure can be used in, for example, a street light, a backlight (including, for example, a sun-coupled backlight), a wall wash light, a billboard light, a parking ramp light, a high bay light, a parking lot light, a signage lit sign (also referred to as an electric sign), static signage (including, for example, sun-coupled static signage), illuminated signage, and other lighting applications. | 10-28-2010 |
20110063854 | SUSPENDED OPTICAL FILM - Suspended optical film assemblies including a frame, an optical film, and an elastomeric film are disclosed. The elastomeric films include a first attachment region, a second attachment region, and a free region between the first and second attachment regions. The first attachment region is affixed to the frame; the second attachment region is affixed to the optical film, so that the free region is in tension and supports the optical film within the frame. The tension in the elastomeric film free region can help maintain flatness and reduce distortion in the optical film during environmental changes that influence dimensional changes in the frame, optical film, and elastomeric film. | 03-17-2011 |
20110090423 | ILLUMINATION DEVICE WITH PROGRESSIVE INJECTION - Illumination devices having a partially transmissive front reflector, a back reflector, and a cavity between them are disclosed. At least one light injector including a baffle and a light source is disposed in the cavity. The light injector is capable of injecting partially collimated light into the cavity. The output area of the illumination device can be increased by disposing light injectors progressively within the cavity, without sacrificing uniformity of the light emitted through the output area. | 04-21-2011 |
20120057350 | SWITCHABLE LIGHT-DUCT EXTRACTION - The disclosure generally relates to switchable light extractors and in particular to switchable light extractors useful for extracting light from light ducts used for interior lighting of a building. The disclosure also relates to lighting systems that include the light extractors, and methods of extracting light from a lighting system. The switchable light extractors generally include a first and a second reflective film, each having a plurality of voids that can aligned to extract light from a light duct. | 03-08-2012 |
20120206814 | LIGHT DUCT BEND - Generally, the present disclosure provides a light duct bend used in a mirror-lined light duct system. In one aspect, the light duct bend includes an input region having a first propagation direction, an output region having a second propagation direction disposed at a bend angle to the first propagation direction, and a transition region connecting the input region to the output region. The transition region includes a plurality of vanes that subdivide the duct into channels, which can reduce the loss and/or disruption of collimation about one or more bends in the light duct system. | 08-16-2012 |
20130120844 | CONCENTRATING DAYLIGHT COLLECTOR - The disclosure generally relates to concentrating daylight collectors, and in particular to concentrating daylight collectors useful for interior lighting of a building. The concentrating daylight collectors generally include a plurality of moveable reflective vanes and a Cassegrain-type concentrator section. | 05-16-2013 |
20140016205 | LIGHT DUCT TEE SPLITTER - The disclosure generally relates to highly efficient light duct light splitters that are capable of splitting the light propagating within a light duct into two different ducts, with nearly 100 percent efficiency. In particular, the described light splitters are configured in a “Tee” shape with a reflective splitter element. | 01-16-2014 |
20140153256 | LIGHT DUCT TEE EXTRACTOR - The disclosure generally relates to highly efficient light duct light extractors that are capable of extracting a portion of the light propagating within a light duct with nearly 100 percent efficiency. In particular, the described light extractors are configured in a “Tee” shape with a reflective diverter element. | 06-05-2014 |
Patent application number | Description | Published |
20080306719 | METHOD AND APPARATUS FOR SIMULATION OF OPTICAL SYSTEMS - Computer-implemented methods of simulating optical systems such as backlights, and machine-readable media for carrying out such methods, are disclosed. The optical systems include optical elements. In some cases, different first and second probability functions can be acquired for first and second elements (respectively) of the optical system. A combined probability function can then be calculated using at least the first and second probability functions, and rays can be traced through the optical system using the combined probability function. The first, second, and combined probability functions can be bidirectional scattering distribution functions (BSDFs), having values stored in cells wherein each cell corresponds to a particular entrance and exiting direction. Some methods can include acquiring a first probability function associated with a first element, the first probability function including cell values as a function of incident direction and exiting direction. Rays can be traced through the optical system using the first probability function. | 12-11-2008 |
20100156953 | THIN HOLLOW BACKLIGHTS WITH BENEFICIAL DESIGN CHARACTERISTICS - A backlight unit ( | 06-24-2010 |
20100165621 | COLLIMATING LIGHT INJECTORS FOR EDGE-LIT BACKLIGHTS - Illumination devices whose function are to inject light into backlights, particularly into backlights that incorporate a recycling cavity formed by a front ( | 07-01-2010 |
20100165660 | BACKLIGHT AND DISPLAY SYSTEM USING SAME - A backlight that includes a front reflector and a back reflector that form a hollow light recycling cavity including an output surface is disclosed. The backlight further includes one or more light sources disposed to emit light into the light recycling cavity. The front reflector includes an on-axis average reflectivity of at least 90% for visible light polarized in a first plane, and an on-axis average reflectivity of at least 25% but less than 90% for visible light polarized in a second plane perpendicular to the first plane. | 07-01-2010 |
20110032449 | PERFORATED BACKLIGHT - A backlight includes a lower light guide having a specularly reflecting bottom surface and an opposing specularly reflecting perforated mirror film having a plurality of light transmission apertures. The specularly reflecting perforated mirror film has a polymeric multilayer structure, where non-perforated areas of the specularly reflecting perforated mirror film have a light reflectance value of 98% or greater and the specularly reflecting bottom surface has a light reflectance value of 98% or greater. A light collimating injector directs input light into the lower light guide. The light propagating generally parallel to the specularly reflecting perforated mirror film along a horizontal plane. The light collimating injector provides input rays into a vertical plane, the vertical plane being orthogonal to the horizontal plane, and forming an angle having an absolute value of 30 degrees or less with an intersection of the vertical and horizontal planes. An upper light cavity is disposed on the lower light guide. The upper light cavity has a light emission surface and a light input surface. The light input surface is at least partially defined by the specularly reflecting perforated mirror film. The upper light cavity has a thickness defined by the light emission surface and the light input surface. The thickness is equal to or greater than a distance between adjacent light transmission apertures. | 02-10-2011 |
20110051047 | HOLLOW BACKLIGHT WITH STRUCTURED FILMS - A backlight ( | 03-03-2011 |
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 |
20130003354 | Light Directing Sign Substrate - A light directing substrate includes a back major surface and a front major surface opposing the back surface. The back major surface includes light reflection regions and light transmission regions. The front surface includes a plurality of lenticular lens elements. A graphic image disposed on or in the light directing substrate. | 01-03-2013 |
20130033875 | ENERGY EFFICIENT SIGN - A light directing composite film includes a planar top major surface, a planar bottom major surface, a plurality of lenticular lens elements disposed between the top major surface and the bottom major surface, and a plurality of light reflection regions and light transmission regions disposed between the plurality of lenticular lens and the planar bottom major surface. | 02-07-2013 |
20130128549 | Backlight And Display System Using Same - A backlight that includes a front reflector and a back reflector that form a hollow light recycling cavity including an output surface is disclosed. The backlight further includes one or more light sources disposed to emit light into the light recycling cavity. The front reflector includes an on-axis average reflectivity of at least 90% for visible light polarized in a first plane, and an on-axis average reflectivity of at least 25% but less than 90% for visible light polarized in a second plane perpendicular to the first plane. | 05-23-2013 |
20140071658 | RECYCLING BACKLIGHTS WITH SEMI-SPECULAR COMPONENTS - A recycling cavity such as used in a backlight or similar extended area source includes a front and back reflector, the front reflector being partially transmissive to provide an output illumination area. The recycling cavity also includes a component that provides the cavity with a balance of specular and diffuse characteristics so as to balance cavity efficiency and brightness uniformity over the output area. The component can be characterized by a transport ratio of greater than 15% for a 15 degree incidence angle, and less than 95% for a 45 degree incidence angle. | 03-13-2014 |
20140240981 | BACKLIGHT AND DISPLAY SYSTEM USING SAME - A backlight that includes a front reflector and a back reflector that form a hollow light recycling cavity including an output surface is disclosed. The backlight further includes one or more light sources disposed to emit light into the light recycling cavity. The front reflector includes an on-axis average reflectivity of at least 90% for visible light polarized in a first plane, and an on-axis average reflectivity of at least 25% but less than 90% for visible light polarized in a second plane perpendicular to the first plane. | 08-28-2014 |