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Ceramic gas discharge metal halide lamps

A metal halide, gas discharge technology, applied in the field of argon-mercury mixture, ceramic gas discharge metal halide (CDM) lamps, can solve the problem of low lumen maintenance rate, and achieve the effect of reliable ignition characteristics

Inactive Publication Date: 2011-12-07
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this mixture of mostly light-atom neon is not even as effective at suppressing tungsten sputtering as pure argon, so lamps filled with light gases such as neon-argon Penning mixtures have lumen maintenance even lower than Lamps using the heavier atoms of argon and xenon

Method used

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  • Ceramic gas discharge metal halide lamps
  • Ceramic gas discharge metal halide lamps
  • Ceramic gas discharge metal halide lamps

Examples

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example 1

[0033] In order to demonstrate some of the advantages of the present invention, two sets of medium power (400W) CDM lamps (with and without antenna) were fabricated for testing with argon starting gas and traces of radioactive krypton, respectively, according to the prior art 85 and a neon-argon Penning mixture of 99.5 mole percent neon and 0.5 mole percent argon according to the present invention. These lamps employ an elliptical discharge vessel with an outer diameter of 18.4 mm, an overall length of 68 mm and a wall thickness of 1 mm. The starting gas filling pressure is 100mbar. The mean mercury dose was ~37 mg. The metal halide salt mixture included sodium, calcium, manganese, thallium, and rare earth iodides (40 mg dose level). The total amount of rare earth iodide is 3 mole percent. An oxygen dispensing agent is added to the lamp as disclosed in US Patent No. 6,362,571, the entire specification of which is hereby incorporated by reference.

[0034] The electrode dim...

example 2

[0039] two groups figure 1 A 400W CDM lamp of the type shown in was prepared as described in Example 1, except that the starting gas filling for both sets of lamps was Ne:Ar (95%:0.5%); the filling gas pressure was 100 mbar; and the discharge vessel The aspect ratio is outside of 1.4.

[0040] In addition, a set of lights is provided with a starting aid in the form of a floating antenna made of Mo. Distance between antenna and discharge electrode a is 5mm.

[0041] Startup was evaluated using two types of ballasts designed for high pressure mercury vapor lamps. The first ballast is a CWA ballast manufactured by Advanced Transformer Co. in accordance with American National Standard ANSI code H33 (OCV of 300v), the ballast product number is 71A 4091, and the second ballast is a reactance manufactured by MWH Ballast, the ballast part number is 260338.

[0042] Lamps without antennas start at nominal power, but not at -10% of nominal power. Lamps with antennas were started a...

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Abstract

A ceramic gas discharge metal halide (CDM) lamp (10) capable of retrofitting existing high pressure iodide (HPI) metal halide and high pressure mercury vapor (HP) lamps to achieve significant energy savings, the CDM lamp ( 10) has a ceramic discharge vessel (12) containing a pair of discharge electrodes (17, 18), a Penning mixture of the noble gases neon and argon, and a chemical filling comprising an oxygen partitioning agent and will Strong oxygen binders are limited to 5 mole percent or less. In a preferred embodiment, the discharge vessel (12) has an aspect ratio R of less than 2, a wall thickness t of up to 1.2 mm, a separation d between the discharge electrodes (17, 18) of up to 14 mm and the discharge vessel (12) outer wall The shortest distance between the discharge electrodes (17, 18) and the floating antenna (26) is up to 7mm.

Description

Background technique [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 discharge vessel and an initiating mixture of noble gases in the discharge space. [0002] In recent years, the increasing need to conserve natural resources has led to a need for more efficient lighting and lamps. For example, China's new energy regulations require a minimum efficacy of 90 lumens per watt for metal halide (MH) lamps. [0003] High pressure iodide (HPI) metal halide lamps, which have been on the market for over forty years, provide white light and a long lifetime and thus have a variety of lighting applications. It is especially popular in Europe and Asia. However, the efficacy of HPI lamps is in the mid-range of 80 lumens per watt. The efficacy of high pressure mercury vapor (MV or HP) lamps is even lower (eg 57.5 lumens / watt for clear lamps and 45 lm / W f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J61/12H01J61/26H01J61/82
CPCH01J61/26H01J61/827H01J61/125
Inventor J.涂
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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