Thallium iodide-free ceramic metal halide lamp

A technology of alkali metal halides and halides, applied in the direction of discharge lamps, gas discharge lamps, parts of gas discharge lamps, etc., can solve the problems of reducing lamp efficiency and lumen maintenance rate, and achieve enhanced performance and enhanced lumen maintenance rate effect

Inactive Publication Date: 2012-04-04
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The previous disadvantages have been the limiting factors for the widespread use of CMH lamps in dimmed, energy-saving situations
[0008] Therefore, there is a need that can meet the need to operate lighting in a more energy-efficient manner independent of the setting, and at the same time be able to do so without suffering a perceived loss of whiteness of the emitted light, in particular without causing a shift towards the emitted light. A shift in greener tones of light without reducing lumen maintenance and without detracting from lamp efficacy

Method used

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  • Thallium iodide-free ceramic metal halide lamp
  • Thallium iodide-free ceramic metal halide lamp
  • Thallium iodide-free ceramic metal halide lamp

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Embodiment Construction

[0020] The present disclosure relates to discharge lamps capable of operating at less than full rated power without suffering undesirable color shifts, loss of lumen maintenance, or loss of lamp efficacy. It finds particular application in conjunction with ceramic metal halide lamps comprising doses of at least one of lanthanum or cerium halides containing no thallium halide, wherein the lamp exhibits substantially no Color shift, good lumen maintenance and good efficacy. In an exemplary embodiment, the lamp comprises a discharge vessel having sealed therein an ionizable fill comprising at least an inert gas, free mercury, and a halide composition excluding thallium, the halide composition comprising an alkali metal halides, alkaline earth metal halides, and rare earth halides comprising at least one of lanthanum and / or cerium. For example, a halide composition without any thallium halide may include at least one of sodium, calcium or strontium halides and at least one of cer...

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Abstract

The present disclosure relates to a discharge lamp (10), in particular a ceramic metal halide lamp, having no thallium halide in the dose (18) thereof, but including an inert gas, Hg, and further halides. The lamp is able to be operated at less than full rated power without suffering undesirable color shift, loss of lumen maintenance or loss of lamp efficacy.

Description

technical field [0001] The present disclosure relates to discharge lamps capable of operating at less than full rated power thereby exhibiting good lumen maintenance and high luminous efficacy without suffering from undesirable color shifts. It finds particular application in conjunction with, and will be described with particular reference to, ceramic metal halide lamps in which there is no thallium iodide in the dose. Background technique [0002] High intensity discharge (HID) lamps are highly efficient lamps that can produce large amounts of light from a relatively small source. These lights are widely used in many applications including retail display lighting, highway and roadway lighting, lighting of large venues such as stadiums, floodlighting of industrial and commercial buildings and stores, and spotlights, to name a few . The term "HID lamp" is used to denote different kinds of lamps. These include mercury vapor lamps, metal halide lamps and sodium lamps. In p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J61/12
CPCH01J61/125H01J61/827
Inventor L·邓
Owner GENERAL ELECTRIC CO
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