Title:
DISCHARGE LAMP AND METHOD GENERATING LIGHT BY NONNELECTRODE DISCHARGE
Document Type and Number:
Japanese Patent JPS5238787
Kind Code:
A
Abstract:
In an electrodeless fluorescent lamp of the type including a sealed, light transmissive, envelope including an elongate inner wall defining an open-ended cavity and an outer wall surrounding the inner wall to form a generally annular, hollow cavity therebetween, the annular cavity being charged with an ionizable gaseous medium, an induction coil positioned within the open-ended cavity, and a radio frequency oscillator connected to the coil, the coil and the oscillator initiating and maintaining ionization of the medium to form an ultraviolet light emitting discharge, the inner surface of the outer wall of the envelope being coated with a phosphor which emits visible light when excited by ultraviolet light, the improvement wherein the outer surface of the inner wall is coated with a layer of an electrically insulative ultraviolet light reflective material which is overcoated with a phosphor layer. Such improvement yields an increase in visible light production of the order of 50% to 100%.
Inventors:
DONARUDO DORURII HORISUTAA
Application Number:
JP9615976A
Publication Date:
March 25, 1977
Filing Date:
August 13, 1976
Export Citation:
Assignee:
HOLLISTER DONALD DRURY
International Classes:
H01J65/04; H05B41/24; (IPC1-7): H01J61/70
Domestic Patent References:
| JPS4740869A |
Foreign References:
| US3521120A | 1970-07-21 |