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Low power ceramic gas discharge metal halide lamps with reduced glow voltage

A metal halide, gas discharge technology, applied in the direction of gas discharge lamps, gas discharge lamp parts, discharge lamps, etc., can solve the problems of increasing the complexity and manufacturing costs of such lamps

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

AI Technical Summary

Problems solved by technology

[0009] However, the use of starting aid conductors requires additional hardware and processing steps, adding to the complexity and manufacturing cost of such lamps

Method used

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  • Low power ceramic gas discharge metal halide lamps with reduced glow voltage
  • Low power ceramic gas discharge metal halide lamps with reduced glow voltage
  • Low power ceramic gas discharge metal halide lamps with reduced glow voltage

Examples

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Embodiment Construction

[0029] figure 1 A low power ceramic gas discharge metal halide (CDM) lamp 10 according to an embodiment of the invention is shown having a PCA discharge vessel 12 comprising a central oval portion 13 enclosing a discharge space 14 and a pair of tubular ends 15 and 16. A pair of discharge electrodes 17 and 18 extend through the ends 15 and 16 of the discharge vessel 12 and are supported by the ends 15 and 16 into the discharge space 14 . An outer bulb 19 surrounds the discharge vessel 12 and the discharge electrodes 17 and 18 and is sealed to the metal screw base 20 to provide a hermetic seal.

[0030] Electrical leads 21 and 22 are electrically connected to base 20 and extend through and are supported by glass seal 23 . The electrical connection between the discharge electrode 18 and the external electrical lead 21 is provided by the support element 24 . The electrical connection between the discharge electrode 17 and the external electrical lead 22 is provided by the frame...

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Abstract

A low power ceramic gas discharge metal halide (CDM) lamp 10 which can be retrofitted into existing low power HPS lamps, the CDM lamp 10 having: an oval shaped ceramic discharge vessel 12 containing A mixture of noble gases neon and argon; and a pair of electrodes (17,18) extending into the discharge vessel 12, the electrodes (17,18) having an electrode gap ratio E=D1 / D2 of at least 0.36, where D1 is the shortest distance from the end of the electrode ( 17 ) to the inner wall of the middle part 13 of the discharge vessel 12 and D2 is the distance between the discharge electrodes 17 and 18 .

Description

technical field [0001] The present invention relates to low power (up to 150W) ceramic gas discharge metal halide (CDM) lamps and more particularly to such lamps utilizing a ceramic discharge vessel and a rare gas mixture in the discharge space. Background technique [0002] Low wattage CDM lamps have a more pleasing white light emission than the yellowish cast of older high pressure sodium (HPS) lamps widely used in North America, making these CDM lamps attractive candidates for retrofitting to the North American present. There are low wattage HPS fixtures inside. The main problem to be overcome is the glow voltage of the CDM lamp and the available open circuit voltage (OCV) of the existing HPS ballast to maintain the glow. [0003] The ignition process of a high intensity discharge (HID) lamp, such as a high pressure sodium (HPS) lamp, involves a voltage breakdown leading to a glow discharge followed by a transition to a full plasma arc discharge. In order for the glow t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J61/073H01J61/16H01J61/82
CPCH01J61/827H01J61/16H01J61/0732
Inventor W.格拉厄姆R.吉布森
Owner KONINK PHILIPS ELECTRONICS NV