General Electric Company

Judit Szigeti

Thomas Frederick Soules

Laszlo Balazs

Pamela K Whitman

Gábor Sajó

Istvan Deme

L&aacute;szl&oacute; Bal&aacute;zs

G&aacute;bor Saj&oacute;

Istv&aacute;n Deme

Zsuzsa Auber

A mercury vapor discharge fluorescent lamp having a barrier layer and a phosphor layer. The barrier layer comprises yttria-coated alumina particles. The barrier layer is preferably at least 11 weight percent yttria. Preferably the yttrium-coated alumina particles are provided in an aqueous suspension and are then substantially separated from the dissolved salts therein before being combined into a coating suspension for coating the lamp.

Fluorescent lamp having improved barrier layer

A low pressure mercury vapor discharge lamp is provided, said discharge lamp ( ) comprising an envelope ( ) formed from light-transmitting material and containing an ionizable gas fill ( ), mercury, and electrodes ( ) sealed in the envelope. The envelope ( ) is provided with a single layer coating ( ) on the internal surface thereof next to the discharge space. The coating ( ) contains halo-phosphate phosphor and 5-30 mass % aluminum oxide relative to the halo-phosphate phosphor, and the primary particle size of the aluminum oxide is smaller than 30 nanometers, the floc size of the aluminum oxide is smaller than 1 micrometer, and the void fraction of the total floc volume is at least 50%.

Low pressure mercury vapor discharge lamp with doped phosphor coating

An electrodeless fluorescent reflector lamp includes a housing arrangement having a threaded screw base for receiving line power and a lamp envelope mounted on the housing arrangement. A ballast circuit is disposed within the housing arrangement and is effective for converting line power into an RF signal which excites a fill contained within the lamp envelope to a discharge state thereby resulting in the production of visible light. The lamp envelope is constructed having an upper curved face portion and a lower tapered portion which extends partly within the housing. A reflective coating is applied to the lower tapered portion of the lamp envelope. A phosphor coating distribution is applied to the interior surface of the lamp envelope in a manner so as to maximize the light output from the reflector lamp. The phosphor coating distribution is such that a first thickness of phosphor material is disposed on the lower tapered portion whereas a second thickness of phosphor material is applied to the upper curved face portion of the lamp envelope. The thickness of the phosphor material applied to the lower tapered portion is substantially greater than that applied to the upper curved face portion thereby resulting in improved light output characteristics for the reflector lamp.

Electrodeless fluorescent lamp having an improved phosphor distribution

Growing community of inventors

Budapest, Hungary

Judit Szigeti