HANDHELD DISPLAY DEVICE FOR MAGNIFYING PRINTED INFORMATION

摘要

A method of magnifying printed content using a handheld display device having a touch-sensitive screen and a transceiver for sending and receiving digital information. The method comprises the steps of: imaging an area of the substrate containing printed content and generating image data using an optical sensor; determining interaction data using the image data, the interaction data identifying a substrate identity; retrieving, using the interaction data and the page description, display data corresponding to the printed content; displaying, on the touch-sensitive screen, display information based on the display data, the display information including displayed content corresponding to the printed content; and interacting with the displayed content via the touch-sensitive screen. Interacting with the displayed content via the touch-sensitive screen magnifies the displayed content on the screen.