Patent · US Active

Method for producing a frosted envelope for a high-pressure discharge lamp

US7396270B2 · kind B2 · utility

0Cited by

8References

3Claims

0Family size

Assignee

Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH · DE

Inventors

Vladimir Högele · Giengen an der Brenz, DE
Thomas Reiners · Giengen an der Brenz, DE

Key dates

Filing date	Feb 4, 2005
Grant date	Jul 8, 2008
Priority date	—
Expiry date	Jul 1, 2026

Classification

Technology area (CPC H)Electricity
CPC primaryH01J61/35
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A high-pressure discharge lamp, in particular a mercury-free high-pressure discharge lamp for a vehicle headlight, has a lamp base (1) and an axially symmetrical discharge vessel (30), in whose discharge space (300) an ionizable filling, containing metal halides, and electrodes (31, 32) are arranged for producing a gas discharge. The discharge vessel (30) is provided with transparent, partial frosting (37), which is limited to a section of the inside or outside of the discharge vessel (30) extending over part of the discharge vessel circumference, this section having a well-defined position with respect to the lamp base (1). Moreover, a simple production method is proposed for partial frosting (37) which is preferably arranged on the inside of the discharge vessel (30).

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