Patent ID: 8339061

Claim:
A method for operating an illuminating system having a high-pressure discharge lamp operated by alternating current, and having a color filter system that filters light from the lamp sequentially in time with the aid of a plurality of color filters, in the case of which method the alternating current supply of the lamp is commutated at least three times within a complete sequence of color filterings, wherein within spacings between commutations there is a spacing, there occurring a phase that is shorter by comparison with a substantially temporally constant lamp current over the large part of the spacings and has a lamp current increased by contrast therewith, wherein there are, respectively provided between the individual color filter phases in the sequential sequence, interphases that cover the time period in which the light from the lamp is simultaneously filtered by two of the color filters, and in which the phases with an overincreased lamp current lie at least partially in these interphases.