Patent ID: 6946672

Claim:
A viewing device for interacting with a human discernable interface surface provided on a substrate, the device including: at least one sensor for sensing coded data on or in a substrate and for generating first data based at least partly on the coded data; a transmitter for transmitting, to a computer system, said first data, or second data at least partially based on the first data; a receiver for receiving, from the computer system, at least display data associated with an identity derived from first data; at least one display device for outputting visual information based at least partially on said display data, the visual information corresponding to at least part of the human discernable interface, a printer mechanism for printing on the substrate; a user interface and control means operable to cause the printer mechanism to print markings on the substrate based at least partially on user input to thereby allow a user to interact with the part of the human discernable interface; and, wherein the device for interacting is configured and arranged such that the sensor is operative to sense the coded data when the display device is positioned, in use, at least partly overlapping the substrate.