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Ceramic gas discharge metal halide lamps with high color temperature

A metal halide, gas discharge technology, used in gas discharge lamps, gas discharge lamp parts, discharge lamps, etc.

Inactive Publication Date: 2011-12-14
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The lamp in US patent 7,268,495 is said to have high efficiency and good color rendering, but as in the case of WO2005 / 088675 the CCT is limited to values ​​up to 4500K

Method used

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  • Ceramic gas discharge metal halide lamps with high color temperature
  • Ceramic gas discharge metal halide lamps with high color temperature
  • Ceramic gas discharge metal halide lamps with high color temperature

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[0029] The arc tube was formed according to the shape shown in the drawing. The shape has a prolate spherical shape with a minor axis width W of approximately 18 mm and a major axis length L of approximately 26 mm. The wall thickness of the main body is about 1 mm. The end of the ball is integrally formed into a hollow axial extension through which the tungsten discharge electrode is inserted. The distance between the tungsten electrodes is 14mm. A dose of Hg is added to the arc tube as well as the salt mixture itself. The arc tube is filled with Ar, and a small amount of Kr is added 85 . The fill pressure was 75 Torr. Other inert gases such as Xe, Ne or a mixture of these gases can also be used for filling. The discharge electrodes are tightly sealed in extensions in the arc tube body.

[0030] The lamp was made with a rated power of 315W. The voltage of the lamp is about 100V, which is adjusted by the dose of Hg. The values ​​of CCT, CRI and MPCD were measured after...

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Abstract

A ceramic gas discharge metal halide (CDM) lamp (23) with a high color temperature (higher than 4500K) having a prolate spherical PCA discharge vessel (12) containing an inert gas, mercury and A filling of a metal halide salt mixture of: at least about 62 mole percent calcium iodide (CaI2); up to about 8 mole percent cerium iodide (CeI3); up to about 15 mole percent % mole percent cesium iodide (CsI); and up to about 15 mole percent other halides selected from the group consisting of lithium (Li), sodium (Na), indium (In), manganese (Mn) , lead (Pb), praseodymium (Pr), europium (Eu), gallium (Ga) and thallium (Tl) halides, and the amount of sodium (Na) halide is less than about 5 mole percent, and thallium halide (Tl ) in an amount of less than about 5% by mole. This light is particularly suitable for horticultural applications, as well as sports lighting, aquarium lighting and other specialty lighting applications.

Description

technical field [0001] The present invention relates generally to ceramic gas discharge metal halide (CDM) lamps, and more particularly to such lamps utilizing a polycrystalline alumina (PCA) ceramic gas discharge vessel which The discharge vessel contains an arc sustaining fill comprising a mixture of metal halide salts. Background technique [0002] CDM lamps typically employ a PCA ceramic discharge vessel surrounded by an outer glass envelope and the base sealed to the envelope to provide a hermetic enclosure. The discharge vessel has a specific shape to accommodate high internal pressure and to provide minimal thermal gradients. The discharge vessel contains a filling of inert gas, salt mixture and mercury which maintains an arc between a pair of discharge electrodes located at opposite ends of the discharge vessel. The discharge electrodes are connected to the base via frame wires, which also support the discharge vessel. [0003] The particular combination of metal ...

Claims

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Application Information

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IPC IPC(8): H01J61/12
CPCH01J61/125H01J61/34H01J61/12
Inventor A.杜纳夫斯基J.帕尔默
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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