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Patent Searching and Data


Title:
CONTROLLED COIL HEATING FOR GAS-DISCHARGE LAMPS
Document Type and Number:
WIPO Patent Application WO/2012/083327
Kind Code:
A3
Abstract:
The invention relates to a ballast for at least one gas-discharge lamp, having a load circuit, to which the gas-discharge lamp is to be connected, a preferably switched-mode heating circuit controlled by means of a switch for at least one coil of the gas-discharge lamp, and a control circuit, wherein the control circuit directly or indirectly detects a temperature of at least one coil on the basis of a preferably electrical temperature parameter, such as for example, a voltage and/or a current at the at least one coil, and the control circuit uses the determined temperature parameter as an actual value for a control of a heat output in order to control the electrical heat output supplied to the coil according to the temperature parameter by activating, preferably pulsing, the switch of the heating circuit. The invention further relates to a method for controlling a coil voltage of a gas-discharge lamp and to a circuit for carrying out the method.

Inventors:
KLIEN DIETMAR (AT)
Application Number:
PCT/AT2011/000507
Publication Date:
September 07, 2012
Filing Date:
December 21, 2011
Export Citation:
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Assignee:
TRIDONIC GMBH & CO KG (AT)
KLIEN DIETMAR (AT)
International Classes:
H05B41/232; H05B41/295; H05B41/36
Domestic Patent References:
WO2009109326A12009-09-11
Foreign References:
US20070029936A12007-02-08
DE4218959A11993-01-14
DE102005057107A12006-06-01
Attorney, Agent or Firm:
BARTH, Alexander (Färbergasse 15, Dornbirn, AT)
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