Abstract: Thioaluminate phosphor particles having a coating comprising or consisting essentially of a nitride, and methods for making such phosphor particles, are disclosed. Phosphor-converted light emitting diodes may comprise such coated phosphor particles. The nitride coatings on the thioaluminate phosphor particles provide a significantly improved barrier to water compared, to an aluminum oxide coating, and extend the operational lifetime of such a phosphor-converted light emitting diode.

Abstract: Phosphors emitting green light over a narrow wavelength range may be used to broaden the gamut of display devices. In one aspect, a light emitting device comprises a light emitting solid state device emitting blue or violet light, a first phosphor that absorbs blue or violet light emitted by the light emitting solid state device and in response emits green light in a spectral band having a peak at wavelength ?G and a height of one half its peak on a long wavelength edge of the band at wavelength ?Ghalf; and a second phosphor that absorbs blue or violet light emitted by the light emitting solid state device and in response emits red light in a spectral band having a peak at wavelength ?R and a height of one half its peak on a short wavelength edge of the band at wavelength ?Rhalf. The ratio (?Rhalf??Ghalf)/(?R??G) is greater than 0.70.

Abstract: A method of manufacturing an Eu2+ activated inorganic red phosphor is provided, wherein the phosphor exhibits an emission spectrum resolvable into a first Gaussian emission curve and a second Gaussian emission curve; wherein the first Gaussian emission curve has a first Gaussian emission curve peak, P1; wherein the first Gaussian emission curve peak, P1, has a peak 1 height, HP1, a peak 1 peak wavelength, P?P1, and a peak 1 area, AP1; wherein the second Gaussian emission curve has a second Gaussian emission curve peak, P2; wherein the second Gaussian emission curve peak, P2, has a peak 2 height, HP2, a peak 2 peak wavelength, P?P2, a peak 2 full width at half max, FWHMP2, and a peak 2 area, AP2; wherein P?P1<P?P2; and, wherein the peak 2 full width at half max, FWHMP2, is minimized.

Abstract: A method of manufacturing an Eu2+ activated inorganic red phosphor is provided, wherein the phosphor exhibits an emission spectrum resolvable into a first Gaussian emission curve and a second Gaussian emission curve; wherein the first Gaussian emission curve has a first Gaussian emission curve peak, P1; wherein the first Gaussian emission curve peak, P1, has a peak 1 height, HP1, a peak 1 peak wavelength, P?P1, and a peak 1 area, AP1; wherein the second Gaussian emission curve has a second Gaussian emission curve peak, P2; wherein the second Gaussian emission curve peak, P2, has a peak 2 height, HP2, a peak 2 peak wavelength, P?P2, a peak 2 full width at half max, FWHMP2, and a peak 2 area, AP2; wherein P?P1<P?P2; and, wherein the peak 2 full width at half max, FWHMP2, is minimized.

Abstract: A phosphor is provided, comprising an inorganic luminescent compound represented by formula (1) having an emission spectrum resolvable into a first Gaussian emission curve and a second Gaussian emission curve; wherein the first Gaussian emission curve has a first Gaussian emission curve peak, P1; wherein the first Gaussian emission curve peak, P1, has a peak 1 height, HP1, a peak 1 peak wavelength, P?P1, and a peak 1 area, AP1; wherein the second Gaussian emission curve has a second Gaussian emission curve peak, P2; wherein the second Gaussian emission curve peak, P2 has a peak 2 height, HP2, a peak 2 peak wavelength, P?P2, a peak 2 full width at half max, FWHMP2, and a peak 2 area, AP2; wherein P?P1<P?P2; and, wherein, at least one of, the peak 2 height, HP2, the peak 2 full width at half max, FWHMP2, and, the peak 2 area, AP2, is minimized.

Abstract: A red phosphor is provided, comprising an inorganic luminescent compound represented by formula (1) having an emission spectrum resolvable into a first Gaussian emission curve and a second Gaussian emission curve; wherein the first Gaussian emission curve has a first Gaussian emission curve peak, P1; wherein the first Gaussian emission curve peak, P1, has a peak 1 height, HP1, a peak 1 peak wavelength, P?P1, and a peak 1 area, AP1; wherein the second Gaussian emission curve has a second Gaussian emission curve peak, P2; wherein the second Gaussian emission curve peak, P2, has a peak 2 height, HP2, a peak 2 peak wavelength, P?P2, a peak 2 full width at half max, FWHMP2, and a peak 2 area, AP2; wherein P?P1<P?P2; and, wherein the peak 2 full width at half max, FWHMP2, is minimized.

Abstract: A presenter delivering a presentation to an audience member uses the disclosed systems and methods to create an immersive delivery of presentation elements by synchronizing components, visual elements, and digital interactions of the presentation to mobile devices. The audience member may hold a mobile device in his hand that receives presentation content and interactions in real-time, and may hold a mobile display device that presents visual content to aid the oral delivery of the presentation.

Abstract: A personal electronic device includes a programmable display and a programmable keypad, wherein at least one of the programmable display and the programmable keypad includes a capacitive touch sensor and an EL panel in a unitary structure. A conductive layer shields the capacitive touch sensor from the EL panel and can be a separate layer or be incorporated into either the capacitive sensor or the EL panel. The conductive layer includes antimony tin oxide (ATO), other conductive oxide, or a conductive polymer, such as Orgacon™ 3010.

Abstract: Disclosed herein is a group of phosphors of the formula M2(SiO4)1-x-y-z(TiO4)x(ZrO4)y(HfO4)z:A,S and light emitting devices which utilize these phosphors.

Abstract: A display includes a light switch overlying a backlight and having at least two light shutters which do not, by themselves, convey information by the shape thereof. The lit area of the backlight is equal to or greater than the sum of the areas of the shutters within the area. The display can also include a graphics layer overlying the light switch. The information content of the display is changed by changing the graphics layer.

Abstract: Disclosed herein is a group of phosphors of the formula M2(SiO4)1-x-y-z(TiO4)x(ZrO4)y(HfO4)z:A,S and light emitting devices which utilize these phosphors.

Abstract: A display includes a light switch overlying a backlight and having at least two light shutters which do not, by themselves, convey information by the shape thereof. The lit area of the backlight is equal to or greater than the sum of the areas of the shutters within the area. The display can also include a graphics layer overlying the light switch. The information content of the display is changed by changing the graphics layer.

Abstract: A light emitting semiconductor device including a light emitting diode having a cascading phosphor is improved by the particles of phosphor being coated with a moisture barrier layer and a buffer layer. Either the buffer layer overlies the moisture barrier layer or the moisture barrier layer overlies the buffer layer. In the latter case, the particles can further include a buffer layer over the moisture barrier layer. Preferred materials for the buffer layer are silica or alumina, which can include other oxides in the layer.

Abstract: An array of light emitting diodes coupled between a substrate and a transparent electrode include a pair of equipotential bus bars supplying electrical current simultaneously to at least two light emitting diodes, each located in its own area of transparent conductive material. In accordance with another aspect of the invention, a linear array of light emitting diodes has an electrode that includes a conductive island for each light emitting diode and a bus bar interconnecting and surrounding the conductive islands.

Abstract: A simple, inexpensive method of producing in bulk a doped metal nitride powder that exhibits a high luminescent efficiency, by first forming a metal-dopant alloy and then reacting the alloy with high purity ammonia under controlled conditions in a reactor. The resulting doped metal nitride powders will exhibit a luminescent efficiency that greatly exceeds that seen in pure undoped GaN powders, doped GaN thin films, and ZnS powders.

Abstract: A method of producing high quality GaN powder by combining high purity gallium and high purity ammonia in a tube reactor under controlled conditions. A reaction between the ammonia and gallium under the controlled conditions produces a porous gallium melt and to a full reaction, yielding high purity crystalline GaN powders with a stoichiometric nitrogen concentration and a hexagonal wurtzite structure.

Abstract: An test cell is adapted for both making and testing samples. The cell includes a bottom plate and a top plate having concentric apertures defining a central test cavity. A post attached to the bottom plate closes off the bottom of the test cavity. A slide closes off the top of the test cavity. The top of the post is spaced slightly from the underside of the slide to define a test cavity of substantially uniform thickness. The test cavity is filled with phosphor suspended in uncured resin, closed, and the resin is cured. Once cured, the sample is stable, although delicate, and can be re-measured several times with reproducible results. The measurement takes place in the cell, using a thin film of oil for wetting surfaces.

Abstract: Particles of electroluminescent phosphor having a moisture proof coating are re-coated by treating the phosphor in a fluidized bed with a mixture of water vapor and an organotrichlorosilane compound for approximately thirty minutes. The resultant siloxane coating further improves the moisture resistance of the phosphor.

Abstract: At least one layer of cascading material overlying an EL lamp converts the light emitted by the EL lamp into infrared light. The EL lamp is supported within in a container transparent to at least infrared light, along with at least one battery and an inverter to provide power for the lamp in portable applications. The lamp is rolled to form a cylinder and fits within the inside diameter of the container. The lamp can be turned on or off by means of a switch interrupting current from a battery or to the lamp.

Abstract: A method for employing a plurality of reusable reticles in an integrated circuit manufacturing process employing lithographic exposure of a semiconductor wafer. Initially there is provided a matrix of a plurality of reticles, each matrix comprising a plurality of tuples of reticles, each reticle tuple comprising one or more reticles. The method then includes defining at least one set of valid groups of reticles in the matrix for use in a desired lithographic exposure process, defining a set of conditions for determining availability of all reticles in the valid groups in the lithographic exposure process, and comparing the availability conditions to the reticles in the set of valid groups and eliminating valid groups which do not meet the availability conditions, leaving non-eliminated valid groups.