Discharge lamp, particularly low-pressure discharge lamp

A technology for low-pressure discharge lamps and discharge lamps, which is applied to discharge lamps, gas discharge lamps, and parts of gas discharge lamps, etc., can solve the problems of not being equipped with debris protection UV protection or color effects, and not being able to use coloring or coloring, etc. Reliable debris protection and effective oxidation resistance

Inactive Publication Date: 2009-08-12
LEDVANCE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, with regard to the spectral filtering function, these single-layer coatings cannot be used for sufficient coloring or tinting, so that current high-duty lamp types cannot be equipped with reliable splinter protection and simultaneous UV protection or color effects

Method used

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  • Discharge lamp, particularly low-pressure discharge lamp

Examples

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Embodiment Construction

[0020] exist figure 1 A cross-sectional view of a low-pressure discharge lamp constructed as a fluorescent lamp 1 is schematically shown in . The fluorescent lamp 1 comprises a tubular discharge vessel 2 which can be, for example, a glass bulb. The electrodes 3 or 4 are respectively arranged on opposite end regions 21 and 22 of the discharge vessel 2 and are fastened to the associated base 5 or 6 . Two electrical contact rods 7a and 7b and 8a and 8b extend outwardly from the lamp caps 5 and 6, respectively. A first coating 9 is formed on the outer side 23 of the discharge vessel 2 . In the exemplary embodiment, the first coating 9 is a plastic made of polycarbonate, polyester, polymethyl methacrylate or polyolefin. The first coating 9 has at least one spectral filtering function for the light generated in the discharge vessel 2 . In particular, the first coating 9 is designed as a UV protection layer.

[0021] The first coating 9 extends over the entire length L, which in...

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Abstract

The invention relates to a discharge lamp, particularly a low-pressure discharge lamp, comprising a discharge vessel (2), two electrodes (3, 4) located at least in part inside the discharge vessel (2), and a first coating (9) which is disposed in at least some areas on an external face (23) of the discharge vessel (2) and is embodied at least as a spectral filter for the light generated in the discharge vessel (2). A second coating (10), which is configured as an antioxidant layer for the first coating (9), is embodied in at least some areas on the first coating (9).

Description

technical field [0001] The invention relates to a discharge lamp, in particular to a low-pressure discharge lamp having a discharge vessel and two electrodes arranged at least partly in the discharge vessel and a first electrode arranged at least partly on the outside of the discharge vessel. A coating which is designed at least as a spectral filter for the light generated in the discharge vessel. Background technique [0002] Discharge lamps, in particular fluorescent lamps, having an outer coating are known. For relatively low-load discharge lamps, ie lamps with a discharge current of, for example, less than 200 mA, it is known that the outer coating consists of plastic. The outer coating can consist, for example, of polycarbonate or polyolefin or polyester, which can also perform the function of a spectral filter, in particular of UV (ultraviolet) protection and of other color effects. For these relatively low-load discharge lamps, the plastic coating mentioned can also...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J61/40
CPCH01J61/40H01J61/35H01J9/20H01J61/067H01J61/327
Inventor 斯特凡·阿佩尔哈拉尔德·登茨阿明·康拉德
Owner LEDVANCE GMBH
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