Nammalwar, Bangalore
Pransanth Kumar Nammalwar, Bangalore IN
Patent application number | Description | Published |
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20100096974 | BLUE-GREEN AND GREEN PHOSPHORS FOR LIGHTING APPLICATIONS - Embodiments of the present techniques provide a related family of phosphors that may be used in lighting systems to generate blue or blue-green light. The phosphors include systems having a general formula of: ((Sr | 04-22-2010 |
Prasanth Kumar Nammalwar, Bangalore IN
Patent application number | Description | Published |
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20080296596 | NOVEL GREEN EMITTING PHOSPHORS AND BLENDS THEREOF - Phosphor compositions, blends thereof and light emitting devices including white light emitting LED based devices, and backlights, based on such phosphor compositions. The devices include a light source and a phosphor material as described. Also disclosed are phosphor blends including such a phosphor and devices made therefrom. | 12-04-2008 |
20110206580 | RARE EARTH RECOVERY FROM FLUORESCENT MATERIAL AND ASSOCIATED METHOD - A method of recovering a rare earth constituent from a phosphor is presented. The method can include a number of steps (a) to (d). In step (a), the phosphor is fired with an alkali material under conditions sufficient to decompose the phosphor into a mixture of oxides. A residue containing rare earth oxides is extracted from the mixture in step (b). In step (c), the residue is treated to obtain a solution, which comprises rare earth constituents in salt form. Rare earth constituents are separated from the solution in step (d). | 08-25-2011 |
20110255265 | PHOSPHOR MATERIALS AND RELATED DEVICES - A phosphor material is presented that includes a blend of a first phosphor, a second phosphor and a third phosphor. The first phosphor includes a composition having a general formula of ((Sr | 10-20-2011 |
20110311823 | CORE SHELL PHOSPHOR AND METHOD OF MAKING THE SAME - A method of making a core-shell phosphor is provided. The method comprises mixing a lanthanum phosphate (LaPO | 12-22-2011 |
20120019126 | OXYNITRIDE PHOSPHORS, METHOD OF PREPARATION, AND LIGHT EMITTING INSTRUMENT - An oxynitride phosphor is presented. The oxynitride phosphor has a formula: ApBqOrNs: R such that A is barium or a combination of barium with at least one of Li, Na, K, Y, Sc, Be, Mg, Ca, Sr, Ba, Zn, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Yb, and Lu; B is silicon or a combination of silicon with at least one of Al, B, Ga, and Ge; R is europium or a combination of europium with at least one of Ce, Pr, Sm, Nd, Tb, Dy, Yb, Tm, Er, Ho, and Mn. p, q, r, s are numbers such that p is greater than about 2 and less than about 6, q is greater than about 8 and less than about 10, r is greater than about 0.1 and less than about 6, and s is greater than about 10 and less than about 15. The method of preparing the oxynitride phosphors and light emitting apparatus including the oxynitride phosphors are included. | 01-26-2012 |
20120152062 | RARE EARTH RECOVERY FROM PHOSPHOR MATERIAL AND ASSOCIATED METHOD - A method for recovering at least one rare earth element from a phosphor is presented. The method includes a halogenation step (a) and a reduction step (b). The phosphor is first halogenated in a molten salt to convert at least one rare earth constituent contained therein to a soluble rare earth halide. Then, the rare earth halide in the molten salt can be reduced, to convert the rare earth halide to a rare earth element in its elemental state. A method for individually recovering multiple rare earth elements from a phosphor is also presented. | 06-21-2012 |
20140178569 | METHOD FOR MAKING RARE EARTH OXIDE COATED PHOSPHOR - A method for making coated zinc silicate phosphor, the method includes the steps of combining a zinc silicate with a rare earth compound under aqueous conditions and removing the water from a product of the combination to form a powder. The powder is fired to form a coated zinc silicate phosphor. | 06-26-2014 |
20140231857 | PHOSPHOR MATERIALS AND RELATED DEVICES - A phosphor material is presented that includes a blend of a first phosphor, a second phosphor and a third phosphor. The first phosphor includes a composition having a general formula of RE | 08-21-2014 |
20140264418 | COLOR STABLE RED-EMITTING PHOSPHORS - A process for synthesizing a color stable Mn | 09-18-2014 |
20140268655 | COLOR STABLE RED-EMITTING PHOSPHORS - A color stable Mn4+ doped phosphor of formula I, | 09-18-2014 |
20140327026 | COLOR STABLE RED-EMITTING PHOSPHORS - A process for synthesizing a color stable Mn | 11-06-2014 |