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Ceramic metal helide lamp

A metal halide and ceramic technology, applied in the field of high-pressure discharge lamps, can solve problems such as premature failure

Inactive Publication Date: 2007-09-05
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been found that in such lamps there is an increasing risk of premature failure e.g. by broken electrodes or cracked plugs

Method used

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  • Ceramic metal helide lamp
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  • Ceramic metal helide lamp

Examples

Experimental program
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Effect test

Embodiment Construction

[0035] The invention may be better understood by reference to the details of the specific examples.

[0036] Referring to FIG. 8 , a ceramic metal halide discharge lamp 1 includes a glass envelope 10 , a glass base 11 with a pair of frame wires 12 , 13 buried therein, a metal base 14 and a center joint 16 insulated from the base 14 . The base leads 12 and 13 are respectively connected to the base 14 and the center joint 16, and not only support the arc tube 20, but also supply power to the electrodes 30 and 40 through the frame wire 17 and the base lead part 13. A suction member 18 is fixed on the frame wire member 17 . Niobium connectors 19 provide electrical connections for the arc tube electrodes 30,40. Furthermore, the wire member 17 is provided with an end portion 9 which contacts a recess 8 formed in the upper axial end of the glass envelope 10 .

[0037] FIG. 9 shows a cross-section of a preferred embodiment arc tube 20 having a four-section feedthrough configuration....

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PUM

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Abstract

The invention relates to a high-pressure discharge lamp of the ceramic metal halide type having a molybdenum coil wrapped around the ceramic discharge vessel and at least a portion of the electrode feed through means, and having power ranges of about 150W to about 1000W. The discharge vessel has a ceramic wall and is closed by a ceramic plug. An electrode which is located inside the discharge space is connected to an electric conductor by way of a leadthrough element. The leadthrough element projects through the ceramic plug with a close fit and is connected thereto in a gastight manner by way of a sealing ceramic. The leadthrough element has a first part which is formed by a cermet at the area of the gastight connection. In addition, the lamps display one or more and most preferably all of the following properties: a CCT (correlated color temperature) of about 3800 to about 4500K, a CRI (color rendering index) of about 70 to about 95, a MPCD (mean perceptible color difference) of about + / -10, and a luminous efficacy up to about 85-95 lumens / watt, a lumen maintenance of >80%, color temperature shift <200K from 100 to 8000, and lifetime of about 10,000 hours to about 25,000 hours. The invention also relates to design spaces for the design and construction of high power lamps.

Description

technical field [0001] The invention relates to a high-pressure discharge lamp provided with a discharge vessel comprising ceramic walls enclosing a discharge space which accommodates an electrode which is connected via a feedthrough to an electrical conductor. The invention also relates to a high-intensity discharge lamp (HID lamp), which has a discharge tube light source, a glass base, a pair of wires buried in the glass base, a glass envelope surrounding the light source, a first A wire frame member at one end and a shaft extending parallel to the axis of the lamp and a second end resiliently mounted within the closed end of the glass envelope. Background technique [0002] High intensity discharge lamps (HID lamps) are commonly used in large area lighting applications due to their high energy efficiency and long service life. The current range of HID products consists of mercury vapor (MV) lamps, high pressure sodium (HPS) lamps and quartz metal halide (MH) lamps. In r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J61/82H01J61/54H01J61/50H01J61/36H01J61/30H01J61/12H01J61/073H01J61/16H01J61/20H01J61/34
CPCH01J61/30H01J61/548H01J61/34H01J61/36H01J61/547H01J61/827H01J61/125H01J61/50
Inventor A·D·杰克逊R·G·吉布森三世S·S·卡莱顿S·吴L·N·科瓦尔茨克T·斯特雷J·J·帕尔默J·C·阿尔德曼J·E·老康拉K·L·科林斯
Owner KONINK PHILIPS ELECTRONICS NV
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