Koninklijke Philips Corporation N.V.

Gerardus Marinus Josephus Franciscus Luijks

Johan Leopold Victorina Hendrix

Hendrik Anton Van Esveld

Vincent Fischer

Johannes Jacobus Franciscus Geijtenbeek

Martinus Joseph Maria Kessels

Antonius Arnoldus Duisters

Theodorus Gerardus Marinus Maria Kappen

Joseph Leonardus Gregorius Suijker

Vital Louis Elisabeth Bruyndoncx

A metal halide lamp includes a discharge vessel surrounded by an outer envelope with clearance and has a ceramic wall which encloses a discharge space filled with a filling comprising an inert gas, such as xenon (Xe), and an ionizable salt. In the discharge space, two electrodes are arranged whose tips have a mutual interspacing so as to define a discharge path between them. The ionizable salt comprises NaI, TlI, CaIand X-iodide wherein X is selected from the group comprising rare earth metals.

Metal halide lamp

A high-pressure discharge lamp has a discharge vessel that is enclosed, with an interspace, by an outer bulb. The end of the outer bulb is provided with a lamp cap. The lamp has an ignition circuit including a series connection of a glow starter and an ohmic impedance. The ohmic impedance is formed by a halogen incandescent lamp. The mutual orientation of the glow starter and the ohmic impedance is such that heat produced by the ohmic impedance is at least partly intercepted by the glow starter.

High-pressure discharge lamp

The invention relates to a high-pressure discharge lamp comprising a discharge vessel which is enclosed, with clearance, by an outer bulb. The outer bulb is closed at one end by a lamp cap. The lamp is provided with an ignition circuit including at least a series arrangement of a glow starter and an ohmic impedance. According to the invention, the ohmic impedance is formed by a halogen incandescent lamp.

High-pressure discharge lamp with ignition circuit including halogen incandescent lamp

The invention relates to a metal halide lamp having an outer bulb containing besides a discharge vessel a UV enhancer (UVE). The UVE has a ceramic wall and, according to the invention, is provided with a pair of internal electrodes. Preferably, at least one of the electrodes has an electrode winding with emitter.

Growing community of inventors

Eindhoven, Netherlands

Gerardus Marinus Josephus Franciscus Luijks