Patent ID: 8577728

Claim:
A display system comprising a communicator and a plurality of remote display modules, the communicator in use transmitting display information to each of the remote display modules each of which is adapted in a lower power mode simply to display information and in a higher power mode periodically to communicate with the communicator to obtain updated display information, each of the remote display modules being adapted automatically to switch between the higher and lower power modes of operation between communications to enable low overall consumption of power by the display module, and wherein each of the remote display modules is assigned one of two or more time slots within which time slot to communicate with the communicator; wherein the communicator, using a processor, transmits a two component signal comprising a synchronisation component containing information related to the synchronisation of communication with a display module and a data component comprising display information for updating the display module, wherein the synchronisation component comprises two or more synchronisation packets, each synchronisation packet comprising data related to a position of the synchronisation packet within the synchronisation component thereby to enable the display module to determine an accuracy of synchronisation of switching to the higher power mode to receive the transmission from the communicator, based on an offset of the position between one of the two or more synchronisation packets and another of the two or more synchronisation packets, and wherein the display module is adapted to automatically correct the synchronisation of communication with the communicator by determining clock drift of the display module based on the offset.