Incandescent light bulb you have enriched the blue

摘要

An object of the present invention is to enhance the blue light-emitting incandescent light bulb. The apparatus includes a light-transmissive envelope 12; and a filament 16 of the envelope in, however, the filament is assumed to be a filament of a case of performing an operation that produces at least one light-emitting having a wavelength of less than 420nm ; outside and the coating 14 on the inner surface, however, the coating is assumed to have the phosphorus emits radiation in the range of 420~490nm when stimulated by light emission from the filament and blue composed of incandescent light bulb 10 which is enriched. .BACKGROUND