H - Electricity – 01 – J
Patent
H - Electricity
01
J
H01J 61/12 (2006.01) H01J 61/14 (2006.01) H01J 61/26 (2006.01) H01J 61/34 (2006.01) H01J 61/82 (2006.01) H01J 61/86 (2006.01)
Patent
CA 2156472
To obtain good color rendition and high light output, while not using thulium in the fill of the discharge vessel of the metal-halide high-pressure discharge lamp, the fill includes thallium and cesium halide and at least one of hafnium and zirconium, and further at least one of the rare-earth metals dysprosium and gadolinium. The hafnium can be entirely or partially replaced by the zirconium, and either dysprosium or gadolinium, or both may be used. The mol relationship between hafnium or zirconium on the one hand, and the sum of the rare- earth metals Dy and/or Gd is at least 0.35, and preferably between about 0.5 and 1.5. The mol relationship of Hf or Zr, respectively, with respect to the fill component T1 is about 0.65, for high wall loading between 1 and 2.5. With respect to Cs, the mol relationship is at least 0.35 and for high wall loading preferably in the range of between 0.5 and 1.
Eisemann Hans
Genz Andreas
Hohlfeld Andreas
Fetherstonhaugh & Co.
Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh
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