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Ceramic metal halide lamp with optimal shape

A lamp and column technology, applied in the field of electric lamps, can solve the problems of light intensity, color separation and poor performance of horizontal cracks, and achieve the effect of improving performance and service life, and optimizing the relationship

Inactive Publication Date: 2007-04-18
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although improved, commercially available vessels for CMH luminaires tend to exhibit poor performance in terms of light intensity, color separation, and horizontal cracking when operated at high wattages

Method used

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  • Ceramic metal halide lamp with optimal shape
  • Ceramic metal halide lamp with optimal shape
  • Ceramic metal halide lamp with optimal shape

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0060] According to the shape shown in FIG. 2, the arc tube is formed with 3 component parts, as shown in FIG. 4. Use includes 20.6% NaI, 2.1% Tl, 12.8% DyI 3 , 6.5% HoI 3 , 6.5% TmI 3 , 0.8% CeI 3 , 48% CaI 2 , and 2.7% CsI filling. The metal halide arc tube is backfilled with a noble gas, which includes Ar and a small amount of added Kr85. The cold fill pressure is 130 Torr. The arc tube is assembled into a luminaire with an external vacuum envelope and a quartz enclosure to contain possible arc tube fragments, and it runs on a North American "pulsed arc" ballast. The arc tube leg geometry, lead design, sealing parameters, and outer housing were the same for all tested luminaires except for the 300W luminaire which used different electrodes.

[0061] A luminaire formed as described above operates in a vertical orientation (ie, as shown in Figure 3) with the lamp cap positioned uppermost. Table 1 shows the characteristics of the luminaire and the characteristics durin...

example 2

[0070] The arc tube is the same as in Example 1, formed with 3 constituent parts according to the shape shown in FIG. 2, as shown in FIG. Use includes 35.3% NaI by weight, 4.9% TlI, 6.3% DyI 3 , 3.2% HoI 3 , 3.2% TmI 3 , 41.6% CaI 2 , and 5.5% CsI filling. The metal halide arc tube is backfilled with a noble gas, which includes Ar and a small amount of added Kr85. The cold fill pressure is 130 Torr. The arc tubes are assembled into luminaires with external vacuum envelopes and run on HPS ballasts. The arc tube leg geometry, lead design, sealing parameters, and outer housing were the same for all tested luminaires. Small modifications were made to the electrodes to accommodate different arc currents at different power loads.

[0071] Luminaires formed as described above operate either in a vertical orientation VBU (ie, as shown in FIG. 3 ) with the cap positioned uppermost, or in a horizontal orientation HOR (as shown in FIG. 2 ). Table 2 shows the characteristics of th...

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Abstract

A metal halide light fixture (10) has a ceramic arc tube (12) having an inner length L, an inner diameter D, and an aspect ratio L / D between about 1.5 and about 2.0, the arc tube The interior contains suitable padding. The fixtures are rated at 200W or higher and can be used with existing ballasts.

Description

technical field [0001] The present invention relates to an electric lamp with a ceramic arctube enclosing a discharge space of length L, diameter D, and aspect ratio L / D, which minimizes sidewall corrosion while extending life and Improve performance. Background technique [0002] Discharge lamps produce light by ionizing and evaporating a mixture of fill materials such as noble gases, metal halides, and mercury with an electric arc passing between two electrodes. The electrodes and fill material are sealed within a translucent or transparent discharge chamber that maintains the pressure on the energized fill material and allows emitted light to pass through. The filling material, also referred to as "filler," emits a desired spectral energy distribution in response to excitation of the arc. For example, the spectral power distribution provided by halogens allows a wide selection of light characteristics such as color temperature, color rendering, and luminance efficacy. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J61/30H01J61/82H01J9/24H01J61/36H01J61/56
CPCH01J61/36H01J9/247H01J61/125H01J61/20H01J61/302H01J61/56
Inventor 詹姆斯·T·达金马修·巴根斯基加里·W·厄特巴克
Owner GENERAL ELECTRIC CO
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