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High-pressure gas-discharge lamp

A high-pressure gas and discharge lamp technology, applied in the direction of gas discharge lamps, high-pressure discharge lamps, gas discharge lamp parts, etc., can solve complex and not very successful problems, achieve size reduction, cost reduction, high temperature resistance performance effect of overcoming

Inactive Publication Date: 2008-03-12
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] According to US5,021,711, it is technically not very feasible to coat molybdenum inside the hermetic pinch seal, because many attempts have been made by those skilled in the art, but for different reasons, to that have not been very successful in practical application so far
It requires increasing the oxidation resistance of those parts of the molybdenum located inside and outside the pinch seal in the lamp respectively, which is a complex and expensive process

Method used

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  • High-pressure gas-discharge lamp

Examples

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Embodiment Construction

[0028] 1 is a schematic illustration of part of a lamp envelope 1 of a high-pressure gas discharge lamp (UHP lamp) according to the invention, which has a discharge chamber 2 . The lamp envelope 1 is entirely in one piece, sealing inside it the discharge chamber 2 filled with the gas normally used for this purpose, and its material is usually quartz glass, and it comprises two mutually occupied by fused stamped seals 61,62. Opposite the cylindrical areas, the two fused stamped seals 61 , 62 each extend longitudinally about 30 mm, and a spherical area 4 is located between these two cylindrical areas, the diameter of which is about 9 mm. Parts of the molybdenum 5 , ie at least part of the molybdenum strips 81 , 82 extending away from the discharge vessel 2 , and at least part of the molybdenum wires 91 , 92 , are still exposed to the oxidizing environment even though they are located in the fused stamped seals 61 , 62 . The electrode arrangement basically comprises a first elect...

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Abstract

The invention relates to a high-pressure gas-discharge lamp, having at least one gastight fused press-seal (61, 62) between a glasslike material and molybdenum, wherein the molybdenum in the fused press-seal (61, 62) is at least partly exposed to an oxidizing environment and at least that part of the molybdenum (5) that is exposed to the oxidizing environment is covered with a coating, and the coating comprises at least one oxide from among Fethe invention relates to a high-pressure gas-discharge lamp,having at least one gastight fused press-seal between a glasslike material and molybdenum,wherein the molybdenum in the fused press-seal is at least partly exposed to an oxidizing environment and at least that part of the molybdenum that is exposed to the oxidizing environment is covered with a coating, and the coating comprises at least one oxide from among Fe2O3, Ta2O5, Nb2O5, Al2O3, SiO2, TiO2, ZrO2, HfO2, and / or one nitride from among TiN, ZrN, HfN, AlN, BN, and / or one carbide from among TiC, ZrC, HfC, VC, NbC, TaC, B4C.

Description

technical field [0001] The invention relates to a high-pressure gas discharge lamp comprising at least one gas-tight fused stamped seal between a glassy material and molybdenum, wherein the molybdenum in the fused stamped seal is at least partially exposed to an oxidizing environment and at least exposed to That part of the molybdenum in the oxidizing environment covers a coating. Background technique [0002] Due to their superior optical properties, such high-pressure gas discharge lamps (HID (High Intensity Discharge) lamps) are preferably used for projection applications, for over head projection and as spotlights. Examples of such high-pressure gas discharge lamps are so-called UHP or MSR lamps (Philips), but the invention also includes similar lamps from other manufacturers. The lamp vessel of such a high-pressure gas discharge lamp preferably consists of quartz or high-temperature glass. The lamp tube usually comprises at least two molybdenum feedthroughs, which ens...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J61/36H01J61/86H01J9/32
CPCH01J61/368H01J9/326H01J61/86
Inventor R·P·肖尔R·希比格A·G·科伯J·拜尔K·加龙D·里尔斯
Owner KONINKLIJKE PHILIPS ELECTRONICS NV