Optical driver arrangement and method for generating a driver signal

An optical driver arrangement, comprising:

• a comparator having a first input for receiving a sensed output signal derived from a sensor signal generated by a light sensor, a second input for receiving a reference signal and a comparator output for providing a comparator signal, and
• a pulse generator having a control input coupled to the comparator output and a generator output for providing a driver signal to a light source,
• wherein the driver signal comprises a series of at least one pulse and
• wherein a parameter of the driver signal is a number, a width, a frequency and/or a distance of pulses and the optical driver arrangement controls the amount of energy emitted by the light source by adjusting at least one of said parameters of the driver signal such that the at least one of said parameters of the driver signal is controlled by the comparator signal,
• wherein the optical driver arrangement comprises a digital-to-analog converter having an output that is coupled to the second input of the comparator for providing the reference signal to the second input of the comparator,
• wherein the pulse generator comprises a control output that is coupled to an input of the digital-to-analog converter and
• wherein the reference signal is a function of the number of pulses of the series of at least one pulse and the reference signal is increased after each of the pulses of the series of at least one pulse.