Patent
High pressure lamp and associated operating method for resonant operation of high pressure lamps in the longitudinal mode, and an associated system
Klaus Stockwald,Herbert K. Weiss +1 more
TLDR
In this paper, a high pressure discharge lamp is fitted with a discharge vessel that has an inside volume with an inside length IL and a maximum inside diameter ID, and that is subdivided into a middle region of constant inside diameter IL and two end regions of variable inside diameter, an electrode projecting into the discharge vessel in each case.Abstract:
The high pressure discharge lamp is fitted with a discharge vessel that has an inside volume with an inside length IL and a maximum inside diameter ID, and that is subdivided into a middle region of constant inside diameter ID and two end regions of variable inside diameter, an electrode projecting into the discharge vessel in the end region in each case. In addition, the discharge vessel has an aspect ratio of 2.5 to 8, preferably 3 to 6, the end region exhibiting a given length LRD in which the inside diameter is reduced to at least 85% of ID.read more
Citations
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PatentDOI
Metal-halide lamp
Josephus Christiaan Maria Hendricx,Joseph L. G. Suijker,Antonius A. Duisters,Fransiscus Arnoldus Vermeulen +3 more
TL;DR: In this paper, a metal-halide lamp with a discharge vessel having a ceramic wall was described, where the discharge vessel comprises two electrodes whose tips are arranged at a mutual distance EA. The relation EA/Di > 5 is complied with.
Patent
High pressure discharge lamp
Steffen Franke,Helmut Hess,Lothar Hitzschke,Marko Käning,Ralf-Peter Dr. Methling,Bernhard Schalk,Hartmut Schneidenbach,Heinz Dr. Schöpp +7 more
TL;DR: In this paper, a high-pressure discharge lamp may include a ceramic elongated discharge vessel with a central part and two ends and an axis, the ends being sealed by means of seals, electrodes, which extend into the discharge volume enveloped by the discharge vessel, being anchored in the seals at leadthroughs, and the lead throughs being sealed in the seal by glass solder, and a fill being accommodated in discharge volume, wherein a cover rests on at least one end of a seal, which has a hollow-cylindrical body which is matched to the diameter of
Journal ArticleDOI
Two-dimensional streaming flows in high-intensity discharge lamps
TL;DR: In this paper, a modified streaming analysis is proposed in which the fluctuating flow is driven by an oscillating pressure field rather by a moving boundary and convective terms in both the instantaneous and streaming flows are included.
Patent
Street lighting lamp with long life, high efficiency, and high lumen maintenance
TL;DR: In this article, the rare earth (RE) halide is selected from the group consisting of lanthanum, cerium, praseodymium, samarium and neody mium, and combinations thereof.
Patent
HID lighting system
TL;DR: In this article, a low-cost HID lighting system consisting of an aspect ratio less than 6 and a resonant electronic driver for driving the HID lamp, the driver being designed for providing alternating current to the lamp and including a control device for determining the current frequency.
References
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Patent
Metal vapor discharge lamp
TL;DR: A metal vapor discharge lamp as discussed by the authors includes a discharge tube comprising a translucent ceramic discharge portion that defines a discharge space in which a luminous metal is sealed, slender tube portions provided on both ends of the discharge portion, a pair of electrodes provided with coils at the tips thereof, electrode supports that support the electrodes at one end thereof and extend all the way to the ends of a slender tube portion on the side opposite to the discharge space at the other end thereof, and a sealant for sealing the end of the tube portions on the opposite side of the vessel.
Patent
Reduction of vertical segregation in a discharge lamp
TL;DR: In this article, a current/voltage input sweeps through a frequency range between the first azimuthal acoustic resonance mode and a first radial acoustic resonant mode of the discharge lamp.
Patent
High pressure discharge lamp
TL;DR: In this paper, a high pressure discharge lamp with an arc tube is formed at least at one end portion as to satisfy a predetermined condition, unlike any known configuration and dimensions of the arc tube end portion, to restrain occurrence of acoustic resonance phenomenon for reducing zones in which the phenomenon occurs at least to be below 50% and effectively preventing any adverse influence of the phenomenon on discharge arc column.
Patent
Metal halide lamp and a vehicle lighting apparatus using the lamp
Kozo Uemura,Toshihiko Ishigami,Toshio Hiruta,Mikio Matsuda,Shigehisa Kawatsuru,Yamazaki Isao,Akio Ishizuka +6 more
TL;DR: A metal halide lamp is a light-transmitting discharge vessel having a discharge space portion, a sealed portion, and a pair of electrodes projecting into the discharge space as mentioned in this paper.
Patent
Discharge lamp-lighting apparatus for straightening arc discharge
TL;DR: In this paper, the shape of the discharge arc at the time of rated lighting can be made substantially straight by supplying the lighting waveform which amplifies the amplitude of the compressional wave emitted from a discharge arc during the period when the vapor pressure of the filler of a discharge lamp is low.
Related Papers (5)
High-pressure lamp, and related operation method and related system for resonating high-pressure lamp in longitudinal mode
Klaus Stockwald,Herbert Weiss +1 more