Back to results
US 2006/0138930 A1Published application
Blue-Enriched Incandescent Lamp
AssigneeOsram Sylvania Inc.
InventorsMadis Raukas, Kailash Mishra
Life of this patent
Estimating the term…
Abstract
A blue-enriched incandescent lamp having on the interior surface of its light transmissive glass envelope a coating in accordance with an aspect of the invention. The coating contains a phosphor that is energized by the ultraviolet/violet emission (<420 nm) from the hot filament causing it to emit radiation in the range of 420 to 490 nm. In a preferred embodiment of the invention, the coating contains a europium-activated barium magnesium aluminate phosphor and a blue pigment.
Claims5
A blue-enriched incandescent lamp comprising:
- a light transmissive envelope;
- a filament within said envelope, the filament producing at least an emission having a wavelength less than 420 nm when operating;
- and
- a coating on the interior surface of said envelope, said coating containing a phosphor that emits radiation in the range of 420 to 490 nm when stimulated by the emission from the filament.
1 more element
Dependencies are inferred from the claim text.