Steuerung für Leuchtstofflampen

摘要

A process is disclosed for independently controlling one or several fluorescent tubes of a lighting installation connected to an AC network. The process ensures the following main functions: fast switching-on, intensity control (dimming), switching-off and storage of a state of operation to be re-established when the installation is once again switched on. The invention is characterised in that it allows already existing conventional lighting installations to be retrofitted without additional installation costs. All that is required is to exchange the conventional starter by the disclosed control circuit, and to exchange the conventional light switch by the disclosed signal generator. For that purpose, a controller (1) is connected instead of the known starter to the heating circuit of a lamp (La) that consists of a fluorescent tube (12) connected in series to a ballast (13). The controller (1) consists of at least the following components: power switch (2), phase detector (10), current supply (11), signal processor (3), clock generator (8) and a control software stored in the non-volatile memory (5) that among others generates signals for controlling the power switch (2) from information supplied by the phase detector (10).