Methods and apparatus include a handheld printer manipulated by an operator to print an image on a media. A controller correlates a location of a printhead to the image and causes printing or not. A position sensor provides input to the controller. Its signal typifies pixels in a matrix frame indicating...http://www.google.fr/patents/US7938531?utm_source=gb-gplus-shareBrevet US7938531 - Methods and apparatus for handheld printing with optical positioning
Methods and apparatus for handheld printing with optical positioning
