Robert S Colburn

US Patent:

55657419, Oct 15, 1996

Filed:

Mar 16, 1994

Appl. No.:

8/213649

Inventors:

Scott D. Jennato - Candia NH
Harold L. Rothwell - Hopkinton NH
Robert H. Colburn - Groveland MA

Assignee:

Osram Sylvania Inc. - Danvers MA

International Classification:

H05B 4116

US Classification:

315246

Abstract:

An method of operating a neon stop lamp for a vehicle is described. By adjusting the lamp pressure, the then controlling the frequency and pulse width of the power, the lamp efficiency can be increased, while also shifting the chromaticity for the lamp to comply with automotive standards. The result is a small, efficient light source whose light may be reflected and focused, and whose color is correct for vehicle warning lights.