Patent ID: 7667409

Claim:
Method for driving a lamp in a lighting system, the lamp comprising a device controller ( 8 ) and a driver ( 12 ), wherein the device controller is periodically supplied with data of a set value representing a goal energizing level for the lamp, the set value is converted to a driver control signal, and the driver is supplied with the driver control signal for driving the lamp, wherein interpolated values are generated between a last value used for generating the driver control signal and a last supplied set value, and then the interpolated values are distributed over a succeeding distribution period, and the interpolated values are used to generate the driver control signal during the distribution period, and wherein the driver control signal is a pulse width modulated signal which is modulated by a current value for generating the driver control signal, and a period of pulses of the driver control signal is identical to a period of succeeding distributed interpolated values of the interpolation period.