Abstract: Organic light emitting devices are disclosed that use a micro electromechanical system (MEMS) structure to enable a pixel and pixel array wherein each pixel contains a MEMS and an OLED element. A MEMS structure is used for switching the OLED element. These OLED/MEMS pixels can be fabricated on flex circuit, silicon, as well as other inorganic materials. They can be fabricated in a large array for developing a 2-dimensional display application and each pixel can be addressed through conventional matrix scanning addressing scheme. The ability of fabricating these OLED/MEMS pixels on flexible organic substrates as well as other rigid substrates enables wider selection of substrate materials for use with different applications.

Abstract: An apparatus provides for the detection, the determination of the location or the spatial distribution, and/or the quantification of an amount of a chemical species by allowing the chemical species to come into contact with a fluid medium contained in a permeable capillary, transferring the content of the capillary after the contact to a detector, and detecting the chemical species as the content of the capillary is transferred to a detector. The fluid medium can contain a selected reagent that selectively interacts with the chemical species to produce an optically detectable interaction product. The location and amount of the chemical species are determined from a characteristic of the chemical species or its interaction product measured on the content of the capillary and the time at which the characteristic is detected.

Abstract: A light emitting device is provided. The light emitting device contains an array of organic light emitting diodes (OLEDs) emitting a plurality of colors, and a layer of scattering media above the light emitting surface of the OLED array. The emission color of the OLEDs may be tuned by applying different power to different sets of OLEDs. The scattering media mixes the colors from each set of OLEDs, such that the device light output has a white color having a desired color temperature.

Abstract: This invention provides an online polymer monitoring apparatus for rapid determination of molecular weight and/or size, and/or other properties of importance to the polymer quality. The apparatus uses fast sample extraction, preparation and delivery techniques to convert complex polymer sample solution into the diluted polymer analyte solution. This analyte solution is then passed through the flow-through detectors for measurement of the polymer molecular weight, the polymer concentration and/or the identification and concentrations of the selected species of importance to the polymer quality. The continuous stream of the above measurement data, thus, allows accurate determination the status of the polymer for many polymer containing process streams, such as an ongoing polymerization reaction mixture, polymer resin fluid, melt or solid polymer flow.

Abstract: Scintillator compositions having a garnet crystal structure useful for the detection of high-energy radiation, such as X, &bgr;, and &ggr; radiation, contain (1) at least one of terbium and lutetium; (2) at least one rare earth metal; and (3) at least one of Al, Ga, and In. Terbium or lutetium may be partially substituted with Y, La, Gd, and Yb. In particular, the scintillator composition contains both terbium and lutetium. The scintillators are characterized by high light output, reduced afterglow, short decay time, and high X-ray stopping power.

Abstract: In a method of coating a CMC fiber, the fiber is passed through a reaction zone along a path substantially parallel to a longitudinal axis of the zone, a flow of fiber coating reactant is passed though the reaction zone, at least a portion of the flow of reactant is disrupted from a path substantially parallel to the fiber path to create a mixing flow adjacent the fiber. A coating reactor includes a reactor chamber to accommodate a fiber passing along a path substantially parallel to a longitudinal axis of the chamber and a flow of fiber coating reactant. The reactor chamber further includes a flow disrupter located within the reactor chamber to disrupt at least a portion of the flow of reactant from a path substantially parallel to the fiber path to create a mixing flow adjacent the fiber.

Abstract: Strontium and strontium calcium aluminates and lanthanum and lanthanum magnesium borates activated with Pr3+ and Mn2+ exhibit characteristics of quantum-splitting phosphors. Improved quantum efficiency may be obtained by further doping with Gd3+. Refined rules for designing quantum-splitting phosphors include the requirement of incorporation of Gd3+ and Mn2+ in the host lattice for facilitation of energy migration.

Abstract: Halophosphate luminescent materials co-activated with europium and manganese ions and having the general formula of (Ca,Sr,Ba,Mg)5(PO4)3:Eu2+,Mn2+ are disclosed. The inclusion of manganese shifts the peak emission to longer wavelengths and, thus, is beneficial in generating a bright yellow-to-orange light. White-light sources are produced by disposing a halophosphate luminescent material, optionally with a blue light-emitting phosphor, in the vicinity of a near UV/blue LED. Blue light-emitting phosphors that may be used in embodiments of the present inventions are Sr4Al14O25:Eu2+, Sr6P6BO20:Eu2+, BaAl8O13:Eu2+, (Sr,Mg,Ca,Ba)5(PO4)3Cl:Eu2+, and Sr2Si3O6.2SrCl2:Eu2+.

Abstract: Epoxy resin compositions are disclosed which comprise (A) at least one cycloaliphatic epoxy resin, (B) a curing agent comprising hexahydro-4-methylphthalic anhydride, (C) at least one a boron containing catalyst that is essentially free of halogen, and (D) at least one cure modifier. The encapsulant may also optionally comprise at least one of ancillary curing catalysts, thermal stabilizers, UV stabilizers, coupling agents, or refractive index modifiers. Also disclosed are packaged solid state devices comprising a package, a chip, and an encapsulant comprising an epoxy resin composition of the invention. A method of encapsulating a solid state device is also provided.

Abstract: Strontium, calcium, strontium calcium, strontium calcium magnesium, calcium magnesium aluminates, and strontium borates activated with Pr3+ exhibit characteristics of quantum-splitting phosphors under VUV excitation. A large emission peak at about 405 nm under VUV excitation is used conveniently to identify quantum-splitting phosphors. Improvements may be achieved with addition of fluorides or boric acid as a flux during the preparation of the phosphors. It is also possible to predict improvement in quantum efficiency by observing the ratio of emission intensities at about 480 nm and about 610 nm.

Abstract: An article includes a silicon-containing substrate and a modified mullite coating. The modified mullite coating comprises mullite and a modifier component that reduces cracks in the modified mullite coating. The article can further comprise a thermal barrier coating applied to the modified mullite coating. The modified mullite coating functions as a bond coating between the external environmental/thermal barrier coating and the silicon-containing substrate. In a method of forming an article, a silicon-containing substrate is formed and a modified mullite coating is applied. The modified mullite coating comprises mullite and a modifier component that reduces cracks in the modified mullite coating.

Abstract: A rare earth-activated terbium-containing garnet phosphor is capable of absorbing radiation in the range from near UV to blue and emitting a broad spectrum of visible light in the range from about 490 nm to about 770 nm. The emission of the phosphor under an excitation at 450 nm exhibits a peak in the range of maximum sensitivity of the human eye. A light source combining a UV/blue LED and this phosphor can provide a white light that is on or near the Planckian locus and may be useful for general illumination.

Abstract: Described herein is a method for providing a clean edge at the interface of a portion of a substrate coated with a coating system and an adjacent portion of the substrate which is uncoated. The method includes the step of forming a zone of non-adherence on the substrate portion which is to be uncoated, prior to application of the coating system. The zone of non-adherence is adjacent the interface, so that the coating system will not adhere to the zone of non-adherence, but will adhere to the portion of the substrate which is to be coated with the coating system.

Abstract: A turbine engine component is provided that has a surface that contains a plurality of depressions that are effective to increase the surface area of the component. The depressions are generally concave in contour and improve the heat transfer characteristics of the component. Methods for forming the turbine engine components are also disclosed.

Abstract: A steam-generation management system remotely measures amounts of utility used by steam-generating systems; monitors and compares their performance against benchmarked performance; analyzes and determines causes for variances in their performance; and recommends to the steam user actions for achieving optimum operation. The steam-generation management also permits remote access and interaction by the user and allows for integrating steam-related information into an overall strategy for managing steam and energy supply.

Abstract: Scintillator compositions useful for the detection of high-energy radiation, such as X, &bgr;, or &ggr; radiation, contain alkali and rare earth pyrotungstates. In particular, the pyrotungstate is a double tungstate containing an oxide of an alkali metal selected from the group consisting of Na, K, Rb, and Cs and an oxide of a rare-earth element selected from the group consisting of Y, Gd, La, and Lu. The scintillators are characterized by high light output, reduced afterglow, short decay time, and high X-ray stopping power.

Abstract: A ceramic discharge chamber for a lamp, according to an exemplary embodiment of the invention, comprises a first member which includes a leg portion and a transition portion, wherein the leg portion and the transition portion are integrally formed as one piece from a ceramic material, and a second member which includes a body portion, wherein the body portion is bonded to the transition portion of the first member. The ceramic discharge chamber can be formed by injection molding a ceramic material to form the first member, the first member forming a first portion of the ceramic discharge chamber; and bonding the first member to a second member which forms a second portion of the ceramic discharge chamber. The members which form the ceramic discharge chamber can greatly facilitate assembly of the discharge chamber, because the discharge chamber can be constructed with only one or two bonds between the members.

Abstract: The invention relates to a light source comprising a phosphor composition 14 and a light emitting device 12 such as an LED or a laser diode 32. The phosphor composition 14 absorbs radiation having a first spectrum and emits radiation having a second spectrum and comprises at least one of: YBO3:Ce3+,Tb3+; BaMgAl10O17:Eu2+,Mn2+; (Sr,Ca,Ba)(Al,Ga)2S4:Eu2+; and Y3Al5O12—Ce3+; and at least one of: Y2O2S:Eu3+,Bi3+; YVO4:Eu3+,Bi3+; SrS:Eu2+; SrY2S4:Eu2+; CaLa2S4:Ce3+; and (Ca,Sr)S:Eu2+. The phosphor composition 14 and the light source 12 together can produce white light with pleasing characteristics, such as a color temperature of 3000-6500° K, a color rendering index of about 83-87, and a device luminous efficacy of about 10-20 lumens per watt.

Abstract: The invention relates to a luminescent display comprising a first electrode, a second electrode, an organic light emitting layer disposed between the first and second electrodes, and a luminescent material which receives light from the organic light emitting layer and converts the light to a different wavelength, wherein the first and second electrodes together define an overlap region in which the organic light emitting layer is activated to emit light, and the luminescent material is disposed in a portion of the overlap region. The invention also relates to a method comprising the steps of creating an image and printing the image on a light emitting device comprising an organic light emitting layer after the light emitting device has been formed. The image may be created, for example on a personal computer, and printed with an inkjet printer. The image may be printed in phosphors which emit light of one wavelength upon absorbing light of a different wavelength from the organic light emitting layer.

Abstract: A coating composition produces a protective coating to a substrate, which coating has an improved surface smoothness. The coating composition comprises a mixture of at least a first type of particles and a second type of particles that are dispersed in a liquid medium. The particles form a total population of particles having a median ESD in a range from about 1 to about 7 micrometers. The different types of particles have different median ESDs. The first type of particles has a maximum ESD of about 40 micrometers, and the second type of particles has a maximum ESD of about 20 micrometers. A method for producing a coating having an improved surface smoothness comprises applying such a coating composition on a substrate and curing the coating composition to produce a protective coating. The coating may be further densified by a burnishing process or further improved by applying another coating comprising particles having ESDs less than about 4 micrometers.