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Low-pressure discharge lamp

A discharge lamp and low-pressure gas technology, applied in the field of low-pressure gas discharge lamps, can solve the problems of glass fading, reduced light transmission ability of glass parts, brown, etc., and achieve the effect of improving color reproduction

Inactive Publication Date: 2009-10-07
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

This so-called solarization reduces the ability of the glass part of the lamp to transmit light and can even cause the glass to discolor to brown

Method used

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  • Low-pressure discharge lamp
  • Low-pressure discharge lamp

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Embodiment Construction

[0020] The drawings are merely diagrammatic and not scaled. Some orientations are exaggerated for greater clarity. Similar components are denoted by the same reference signs as much as possible.

[0021] exist figure 1 and figure 2In the illustrated embodiment, the low-pressure gas discharge lamp according to the invention consists of a substantially toroidally curved discharge vessel 1 , which surrounds a discharge space 2 . The means 3 for generating an electromagnetic field are arranged centrally in the form of generally heat-balancing heat conductors 3 a and ferrite parts 3 b , by means of which the gas discharge present in the discharge space 2 is ignited. The induction device 3 is connected to the base 10 of the lamp. The low-pressure gas discharge lamp also comprises, in a manner known per se, an electronic ballast for controlling the ignition and operation of the gas discharge lamp.

[0022] The gas discharge vessel 1 is optionally embodied in the shape of a cyli...

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Abstract

The invention relates to an improved low-pressure gas discharge lamp comprising a gas discharge vessel (1) surrounding a discharge space (2), containing a gas filling, and further comprising means to generate an electromagnetic field (3) and means for generating and maintaining a low-pressure gas discharge. The lamp is characterized in that the discharge lamp is provided with a first phosphor coating on a surface of the gas discharge vessel and with a second phosphor coating, the second phosphor coating being provided on a surface of the lamp that is more remote from the discharge space compared to the first phosphor coating, and the first phosphor coating being selected from the group of thermally stable phosphors. The low-pressure discharge lamp provides increased efficiency and reduced solarisation as compared to commercially available low-pressure discharge lamps.

Description

technical field [0001] The invention relates to a low pressure gas discharge lamp comprising a gas discharge vessel surrounding a discharge space containing a gas filling and means for forming an electromagnetic field for generating and maintaining a low pressure gas discharge. Background technique [0002] The generation of light in a low-pressure gas discharge lamp relies on the principle that charge carriers, especially electrons and ions, accelerated very strongly by the electric field of the lamp, collide with atoms or molecules in the gas filling the lamp, causing these gas atoms or molecules Excited or ionized. When the atoms or molecules filling the gas return to a lower energy state, a more or less substantial part of the excitation energy is converted into radiation. [0003] Conventional low-pressure gas discharge lamps contain mercury in the filling gas and additionally have a phosphorous coating on the gas discharge vessel. A disadvantage of mercury low-pressu...

Claims

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Application Information

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IPC IPC(8): H01J65/04H01J61/42H01J61/48
CPCH01J65/048H01J61/48
Inventor P·安东尼斯M·J·S·E·森森R·E·德曼G·A·R·范迪克
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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