Lightscape Materials, Inc.

Dow Global Technolgoies LLC

World Properties, Inc.

Eie Materials, Inc.

Arizona Board of Regents, a Body Corporate

Current Lighting Solutions, LLC

Alan C Thomas

Yongchi Tian

Mary Anne Leugers

Michael Dennis Romanelli

Walter J Paciorek

Robert Nordsell

Jonathan Melman

Eric Bretschneider

Yuming Xie

Perry Niel Yocom

Yuanqiang Li

David G Pires

Yong Bok Go

William A Coghlan

Evan Thomas

Kristen Baroudi

Olga Zakharov

Alison Sides

Rafael Garcia

Mark A Seelhammer

Fernando A Ponce

Abigail Bell

Michael R Stevens

Karen Ruth Brower

Roy Scott Chancellor

Will Melvell Hooke, Jr

Curtis Henry Kempton

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.

Coated thioaluminate phosphor particles

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 &#x3bb;and a height of one half its peak on a long wavelength edge of the band at wavelength &#x3bb;; 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 &#x3bb;and a height of one half its peak on a short wavelength edge of the band at wavelength &#x3bb;. The ratio (&#x3bb;&#x2212;&#x3bb;)/(&#x3bb;&#x2212;&#x3bb;) is greater than 0.70.

Gamut broadened displays with narrow band green phosphors

A method of manufacturing an Euactivated 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, P; wherein the first Gaussian emission curve peak, P, has a peak 1 height, H, a peak 1 peak wavelength, P&#x3bb;, and a peak 1 area, A; wherein the second Gaussian emission curve has a second Gaussian emission curve peak, P; wherein the second Gaussian emission curve peak, P, has a peak 2 height, H, a peak 2 peak wavelength, P&#x3bb;, a peak 2 full width at half max, FWHM, and a peak 2 area, A; wherein P&#x3bb;&#x3c;P&#x3bb;; and, wherein the peak 2 full width at half max, FWHM, is minimized.

[object Object]

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, P; wherein the first Gaussian emission curve peak, P, has a peak 1 height, H, a peak 1 peak wavelength, P&#x3bb;, and a peak 1 area, A; wherein the second Gaussian emission curve has a second Gaussian emission curve peak, P; wherein the second Gaussian emission curve peak, Phas a peak 2 height, H, a peak 2 peak wavelength, P&#x3bb;, a peak 2 full width at half max, FWHM, and a peak 2 area, A; wherein P&#x3bb;&#x3c;P&#x3bb;; and, wherein, at least one of, the peak 2 height, H, the peak 2 full width at half max, FWHM, and, the peak 2 area, A, is minimized.

Inorganic phosphor and light emitting devices comprising same

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, P; wherein the first Gaussian emission curve peak, P, has a peak 1 height, H, a peak 1 peak wavelength, P&#x3bb;, and a peak 1 area, A; wherein the second Gaussian emission curve has a second Gaussian emission curve peak, P; wherein the second Gaussian emission curve peak, P, has a peak 2 height, H, a peak 2 peak wavelength, P&#x3bb;, a peak 2 full width at half max, FWHM, and a peak 2 area, A; wherein P&#x3bb;&#x3c;P&#x3bb;; and, wherein the peak 2 full width at half max, FWHM, is minimized.

Inorganic red phosphor and lighting devices comprising same

Disclosed herein is a novel group of carbonitride and carbidonitride phosphors and light emitting devices which utilize these phosphors. In certain embodiments, the inventive phosphors are expressed as follows:CaSiCAlNOEu&#x2003;&#x2003;(1)M(II)SiCM(III)NOH:A&#x2003;&#x2003;(2)MSiCM(III)NOH:A&#x2003;&#x2003;(3)CaSiAlNCO:Eu&#x2003;&#x2003;(4)M(II)SiM(III)NCOH:A&#x2003;&#x2003;(5)MSiM(III)NCOH:A&#x2003;&#x2003;(6)wherein v is the valence number of M, 0&#x2266;m&#x3c;5, 0&#x2266;n&#x2266;3, 0&#x2266;x&#x3c;4, and 0&#x2266;y&#x3c;1, M is at least one cation, M(II) is at least one divalent cation, M(III) is at least one trivalent cation, H is at least one monovalent anion, and A is a luminescence activator.

Carbonitride and carbidonitride phosphors and lighting devices using the same

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&#x2122; 3010.

Capacitive touch sensor with integral EL backlight

Disclosed herein is a group of phosphors of the formulaM(SiO)(TiO)(ZrO)(HfO):A,Sand light emitting devices which utilize these phosphors.

Silicate-based phosphors and LED lighting devices using the same

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.

Light switch having plural shutters

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.

Systems and methods for synthesis of gallium nitride powders

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.

Test cell for evaluating phosphor

Growing community of inventors

Yardley, PA, United States of America

Alan C Thomas