Fluorescent lamp having ultraviolet reflecting layer
AssigneeGeneral Electric Company
InventorsJon B. Jansma, Colleen M. Griffith
Life of this patent
Estimating the term…
Abstract
A fluorescent lamp with an ultraviolet reflecting barrier layer between the glass envelope and the phosphor layer(s). The barrier layer is a blend of gamma alumina, alpha alumina and theta alumina, such as 5–80 weight percent gamma alumina, 5–80 weight percent alpha alumina, and 5–80 weight percent theta alumina.
Claims15
A mercury vapor discharge lamp comprising a light-transmissive envelope having an inner surface, means for providing a discharge, a discharge-sustaining fill gas sealed inside said envelope, a phosphor layer inside the envelope and adjacent the inner surface of the envelope, and a barrier layer between the envelope and the phosphor layer, the barrier layer comprising a blend of gamma alumina, alpha alumina and theta alumina.
Dependencies are inferred from the claim text.