Patent · US Expired

Low-pressure mercury discharge lamp for tanning

US6208069A · kind A · utility

4Cited by

2References

11Claims

0Family size

Assignee

U.S. Philips Corporation · US

Inventors

Thomas Justel · Witten, DE
Hans Nikol · Aachen, DE
Cornelis Reinder Ronda · Aachen, DE
Dick Van Der Voort · Eindhoven, NL
Cornelis Jojakim Jalink · Eindhoven, NL

Key dates

Filing date	Dec 9, 1998
Grant date	Mar 27, 2001
Priority date	—
Expiry date	Dec 9, 2018

Classification

Technology area (CPC H)Electricity
CPC primaryH01J61/72
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A lamp vessel is made from a material which absorbs short-wave UV radiation. In addition, the luminescent screen comprises cerium-activated lunthanum phosphate and a luminescent substance having an emission band whose maximum is situated in the wavelength range from 340 nm and whose half-value ranges between 35 nm and 80 nm. The emission spectrum of the lamp for wavelengths below 400 nm corresponds closely to the solar spectrum while the lamp also has a high erythema L light output.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.