| Patent Number |
Title Of Patent |
Date Issued |
| 7431463 |
Light emitting diode projection display systems |
October 7, 2008 |
| A projection display system has at least one light-recycling illumination system and at least one imaging light modulator. The light-recycling illumination system includes a light source that is enclosed within a light-recycling cavity. The light source is a plurality of light-emitting |
| 7378686 |
Light emitting diode and side emitting lens |
May 27, 2008 |
| The invention is an illumination system that incorporates a light emitting diode and a side-emitting light-recycling lens. The side-emitting light-recycling lens recycles part of the light internally generated by a light emitting diode back to the light emitting diode as externally i |
| 7370993 |
Light recycling illumination systems having restricted angular output |
May 13, 2008 |
| This invention is an illumination system that incorporates a light emitting diode and a partially reflecting optical element. The light emitting diode emits internally generated light having a first angular range and reflects incident light with high reflectivity. The partially refle |
| 7352124 |
Light recycling illumination systems utilizing light emitting diodes |
April 1, 2008 |
| This invention is an illumination system that incorporates a light emitting diode and a partially reflecting optical element. The light emitting diode emits internally generated light and reflects incident light with high reflectivity. The partially reflecting optical element transmi |
| 7352006 |
Light emitting diodes exhibiting both high reflectivity and high light extraction |
April 1, 2008 |
| The invention is a light emitting diode that exhibits high reflectivity to incident light and high extraction efficiency for internally generated light. The light emitting diode includes a reflecting layer that reflects both the incident light and the internally generated light. A multi- |
| 7293908 |
Side emitting illumination systems incorporating light emitting diodes |
November 13, 2007 |
| The invention is a side-emitting illumination system that incorporates a light emitting diode. The side-emitting illumination system recycles a portion of the light internally generated by a light emitting diode back to the light emitting diode as externally incident light. The light |
| 7285791 |
Wavelength conversion chip for use in solid-state lighting and method for making same |
October 23, 2007 |
| A wavelength conversion chip is formed by depositing a wavelength conversion material layer on a substrate, segmenting the wavelength conversion layer into a plurality of wavelength conversion chips, and then removing the wavelength conversion chips from the substrate. The wavelength |
| 7048385 |
Projection display systems utilizing color scrolling and light emitting diodes |
May 23, 2006 |
| A projection display system has at least one light-recycling illumination system, a color scroller and an imaging light modulator. The light-recycling illumination system includes a light source that is enclosed within a light-recycling envelope. The light source is a light-emitting |
| 7040774 |
Illumination systems utilizing multiple wavelength light recycling |
May 9, 2006 |
| An illumination system has a light source and a wavelength conversion layer within a light-recycling envelope. The light source is a light-emitting diode or a semiconductor laser. The light source will emit light of a first wavelength range that is transmitted through the wavelength |
| 7025464 |
Projection display systems utilizing light emitting diodes and light recycling |
April 11, 2006 |
| A projection display system has at least one light-recycling illumination system and at least one imaging light modulator. The light-recycling illumination system includes a light source that is enclosed within a light-recycling envelope. The light source is a light-emitting diode that |
| 7011932 |
Polymer waveguide fabrication process |
March 14, 2006 |
| The invention relates to a process a process for forming single-mode, organic waveguides employing organic polymeric materials. The process reduces dissolved and gaseous oxygen content to very low quantities, resulting in production of waveguides having superior properties and manufa |
| 6960872 |
Illumination systems utilizing light emitting diodes and light recycling to enhance output radia |
November 1, 2005 |
| An illumination system has a light source that is at least partially enclosed within a light-recycling envelope. The light source is a light-emitting diode that emits light, and a fraction of that light will exit the light-recycling envelope through an aperture. The light-recycling e |
| 6738543 |
Hitless tunable wavelength filters |
May 18, 2004 |
| A hitless wavelength selective optical device includes a first thermo-optic switch (TOS), a second TOS, a first waveguide, a second waveguide, a third waveguide, a heating element and a control unit. The first TOS includes receives a wavelength division multiplexed (WDM) signal at a firs |
| 6657749 |
Scanner using lens array producing inverted images |
December 2, 2003 |
| An optically-based and image processing-based scanner including a lens array, an imager, and an array of baffles to define paths of light between the lenses and the imager. Each of the lenses produces an inverted image of a portion of the object to be imaged. Components in the imager |
| 6550942 |
Linear illumination sources and systems |
April 22, 2003 |
| Improved linear illumination sources are disclosed which utilize external, highly reflective enclosures containing one or more linear openings and thereby achieve improved source efficiency, output irradiance and/or output radiance. Such improved illumination sources may be combined with |
| 6424786 |
Illumination assembly |
July 23, 2002 |
| An optical illumination assembly comprising an array of optical microprisms and microlenses for redirecting light from a light source. Such displays are used in a wide variety of applications such as backlit flat panel displays requiring a directed light source which provides an efficien |
| 6305811 |
Illumination system having an array of linear prisms |
October 23, 2001 |
| An illumination system provides a light output distribution that is ideally suited for home and office applications. The illumination system generally comprises a solid waveguide and a light directing structure located on a side opposite of the waveguide's light output side for controlli |
| 6186649 |
Linear illumination sources and systems |
February 13, 2001 |
| Improved linear illumination sources are disclosed which utilize external, highly reflective enclosures containing one or more linear openings and thereby achieve improved source efficiency, output irradiance and/or output radiance. Such improved illumination sources may be combined with |
| 6185357 |
Illumination system using edge-illuminated hollow waveguide and lenticular optical structures |
February 6, 2001 |
| An illumination system having a hollow waveguide including first and second light directing arrays (LDA), each having a plurality of generally lenticular prisms defined thereon and arranged generally orthogonally with respect to each other. Light rays from a light source enter the wavegu |
| 6144536 |
Illumination system with light recycling to enhance brightness |
November 7, 2000 |
| An optical illumination system is comprised of: (a) a light source means having a reflective emitting surface and an intrinsic luminance (brightness), (b) a light transmitting means; (c) a light reflecting means to reflect and recycle a portion of the light emitted by the light source |
| 6114090 |
Thermally-stable photopolymer composition and light transmissive device |
September 5, 2000 |
| A photopolymerizable composition for use in forming a photopolymer composition for use in forming the light transmissive regions of light transmissive devices, and such devices.The photopolymerizable composition comprises one or more ethylenically unsaturated monomers selected from the g |
| 6106128 |
Illumination system having edge-illuminated waveguide and separate components for extracting and |
August 22, 2000 |
| An illumination system has separate components for extracting and directing light from a waveguide. The system eliminates the need to provide a light directing array (LDA) that is optically and physically coupled to the waveguide. It is more reliable and robust than previous illumination |
| 5949933 |
Lenticular illumination system |
September 7, 1999 |
| An optical illumination system comprising a waveguide that accepts light and transmits the light via total internal reflection. Attached on one face of the waveguide is an array of lenticular microprisms, with each microprism having an light input surface optically coupled to the wav |
| 5761355 |
Light directing optical structure |
June 2, 1998 |
| A light directing optical structure is formed of a light waveguide preferably made of clear plastic; attached to or formed with the waveguide are a multiplicity of prisms. Each prism, due to its index of refraction, provides an aperature where light may escape the waveguide rather than |
| 5748828 |
Color separating backlight |
May 5, 1998 |
| A backlight for use in a flat panel display backlight consists of three components, (1) a collimating means, optically coupled to a waveguide suitable for transmitting light, which collimates white light and directs the light at an angle to the normal (perpendicular) direction to the |
| 5739931 |
Illumination system employing an array of microprisms |
April 14, 1998 |
| An optical illumination system comprising a waveguide that accepts light generated by a diffuse light source and transmits the light via total internal reflection. Attached on one face of the waveguide is an array of microprisms, with each microprism having an light input surface paralle |
| 5696865 |
Optical waveguide having two or more refractive indices and method of manufacturing same |
December 9, 1997 |
| An optical tapered waveguide for use as a single device or in optical arrays is described. The optical waveguide contains at least one inclusive structure. The inclusion may possess an abrupt refractive index interface within the body of the tapered optical waveguide or it may consist of |
| 5598281 |
Backlight assembly for improved illumination employing tapered optical elements |
January 28, 1997 |
| An improved backlight assembly comprising an array of apertures in close proximity to a light source, an array of tapered optical elements that have a light input surface area smaller than the light output surface area. Light rays pass through the apertures and are directed to the op |
| 5555329 |
Light directing optical structure |
September 10, 1996 |
| A light directing optical structure is formed of a light waveguide preferably made of clear plastic; attached to or formed with the waveguide are a multiplicity of prisms. Each prism, due to its index of refraction, provides an aperature where light may escape the waveguide rather than |
| 5555109 |
Illumination system employing an array of microprisms |
September 10, 1996 |
| An optical illumination system comprising a waveguide that accepts light generated by a diffuse light source and transmits the light via total internal reflection. Attached on one face of the waveguide is an array of microprisms, with each microprism having an light input surface paralle |
| 5541039 |
Method for forming optically active waveguides |
July 30, 1996 |
| Optically active (optically non-linear or electro-optically active) waveguides are formed by depositing a layer of organic material, typically polymeric material, comprising one or more opticaly active components, and subjecting predetermined regions of the layer to actinic radiation to |
| 5521725 |
Illumination system employing an array of microprisms |
May 28, 1996 |
| An optical illumination system comprising a waveguide that accepts light generated by a diffuse light source and transmits the light via total internal reflection. Attached on one surface of the waveguide is a low index of refraction layer and an array of microprisms, with each micro |
| 5481385 |
Direct view display device with array of tapered waveguide on viewer side |
January 2, 1996 |
| A direct view display including a light generating means for generating light, a modulating means for modulating light from said light generating means to form an image, and an image display means for displaying said image from said modulating means positioned adjacent to the light outpu |
| 5462700 |
Process for making an array of tapered photopolymerized waveguides |
October 31, 1995 |
| The present invention is directed to a process for making an array of tapered photopolymerized waveguides. A photomask having opaque and transparent regions is placed in substantial contact with a substrate having a substantially uniform thickness of photopolymerizable mixture thereo |
| 5428468 |
Illumination system employing an array of microprisms |
June 27, 1995 |
| An optical illumination system comprising a waveguide that accepts light generated by a diffuse light source and transmits the light via total internal reflection. Attached on one face of the waveguide is an array of microprisms, with each microprism having an light input surface paralle |
| 5396350 |
Backlighting apparatus employing an array of microprisms |
March 7, 1995 |
| An improved backlighting apparatus comprising a slab waveguide that accepts light rays generated by a light source and transmits the light rays via total internal reflection. Attached on one face of the slab waveguide is an array of microprisms, with each microprism having an light input |
| 5359687 |
Polymer microstructures which facilitate fiber optic to waveguide coupling |
October 25, 1994 |
| The present invention is directed to an optical coupling device for facilitating the coupling of an optical fiber to an optical waveguide and to a method for fabricating such coupling device. Another aspect of this invention relates to optical fiber to optical waveguide interconnect |
| 4814294 |
Method of growing cobalt silicide films by chemical vapor deposition |
March 21, 1989 |
| This invention relates to an improved method of depositing cobalt silicide films on a substrate by chemical vapor deposition at a temperature range of about 100.degree.-400.degree. C. By employing two separate precursors of, preferably, for cobalt, comprised of cobalt carbonyls having a |
| 4568565 |
Light induced chemical vapor deposition of conductive titanium silicide films |
February 4, 1986 |
| Conductive titanium silicide-containing films and composites comprising substrates and the film are produced by light induced chemical vapor deposition. The process eliminates the need to anneal the silicide film in order to produce a conductive film and overcomes the problem of substrat |
| 4457992 |
Etchable electrophotographic long-run printing plate and method of making same |
July 3, 1984 |
| An etchable electrophotographic printing plate comprising a coating on a surface of an electroconductive support such as grained, anodized aluminum of effective amounts of photoconductive ZnO and of a sensitizing dye dispersed in an organic resin binder comprised of about 60-90 wt. % of |
| 4418135 |
Thermally-stable, infrared-sensitive zinc oxide electrophotographic compositions element and pro |
November 29, 1983 |
| Electrophotographic compositions containing zinc oxide dispersed in a certain resin binder mixture and sensitized with a cyanine dye having a particular structure provide high sensitivity in the 780-840 nm wavelength range, excellent thermal stability, long dark decay time and near-white |
