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Circuit arrangement, and method for the operation of a fluorescent lamp

A technology of circuit devices and fluorescent lamps, applied in lighting devices, light sources, electric light sources, etc., can solve the problems of fluorescent lamp efficiency degradation, inability to prevent, and inability to remove deposits, etc.

Inactive Publication Date: 2010-02-24
OSRAM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Said area is therefore no longer available for emission to a limited extent or completely, so that the maximum possible service life of the lamp cannot be achieved
[0003] Continuous heating of the filament to prevent this deposition is undesirable because of the consequent continuous wear that leads to a considerable degradation of the efficiency of the fluorescent lamp, and because of the heating of the cold spot where the Hg vapor pressure is regulated
The heating of the filament for igniting fluorescent lamps is very short, that is, the heating process is less than 0.5s and mostly uneven
Deposits are thus neither removed nor prevented from forming

Method used

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  • Circuit arrangement, and method for the operation of a fluorescent lamp

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Embodiment Construction

[0017] FIG. 1 shows a schematic diagram of an exemplary embodiment of a circuit arrangement according to the invention. The circuit arrangement includes a control line 10 via which, for example, dimming signals and / or switching signals for fluorescent lamps 12 are transmitted. They are transmitted to the interface 14 of the control device 16 , where they are converted into excitation signals for operating the fluorescent lamp 12 . However, they are also fed to a device 20 for determining at least one value of an operating parameter, wherein this device 20 can be coupled to a timer 18 in order to detect the operating hours of the fluorescent lamp 12 . Additionally or alternatively, the device 20 for determining an operating parameter can be designed to count the number of on / off switching operations and / or the number of dimming changes, in particular important dimming changes.

[0018] The device 20 for determining at least one operating parameter supplies the value of the at ...

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PUM

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Abstract

The invention relates to a circuit arrangement for operating a fluorescent lamp (12) comprising a first and a second coil. The circuit arrangement encompasses a heater (24) for the first and the second coil, a device (20) for storing at least one threshold value for at least one service parameter of the fluorescent lamp (12), a device (20) for determining the value of the at least one service parameter, and a control device (16) which is designed to activate the heater (24) for the first and the second coil for a predefined period of time when the determined value of the at least one service parameter exceeds the at least one threshold value for the at least one service parameter. The invention further relates to a method for operating a fluorescent lamp (12) comprising a first and a second coil on a circuit arrangement encompassing a heater (24) for the first and the second coil. Said method comprises the following steps: a) at least one threshold value for at least one service parameter of the fluorescent lamp (12) is defined; and b) the heater (24) for the first and the second coil is activated for a predefined period of time when the at least one threshold value is exceeded.

Description

technical field [0001] The invention relates to a circuit arrangement for operating a fluorescent lamp having a first filament and a second filament, wherein the circuit arrangement comprises a heating device for the first filament and the second filament. Furthermore, the invention relates to a method for operating a fluorescent lamp having a first filament and a second filament by means of a circuit arrangement having a heating device for a first filament and a second filament. Background technique [0002] During operation of fluorescent lamps, regions are formed on the filament by various effects, which impair the emission performance of the emitter or even completely impair the emission performance of the emitter. In particular the deposition of dirt or combustible material and the resulting conversion processes are to be included in this effect. Said area is therefore no longer available for emission to a limited extent or completely, so that the maximum possible serv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B41/298
CPCH05B41/2988H05B41/295H05B47/20H05B41/14H05B41/02
Inventor 托马斯·穆德拉
Owner OSRAM GMBH