A vehicle headlamp control method and apparatus includes providing an imaging sensor that senses light in spatially separated regions of a field of view forward of the vehicle. In response to the handoff request, the handoff controller selects a second wireless system for the mobile node and establishes a packet registration with the second wireless system on behalf of the mobile node. A bias potential provider selectively applies a bias potential to at least one of the pressure generating elements not to be driven. For each stage, a base value and a step value for the escape token are determined using a heuristic modeling function in view of the determined number of escape tokens such that a number of bits required to encode the input stream is minimized. The methods are compatible with thin-film manufacturing processes known in the art and result in displays having lower power-consumption.