Document reader for partially sighted user has light to produce flashes onto book picked up by video camera with shutter

摘要

The book or document reader for the partially sighted has a video camera (1) to receive a video image from a book(7). A light source (5) produces short, discrete light flashes (6) to illuminate the book and a shutter or closure is synchronised with the video camera so that a flash is only produced when the shutter or closure is open. The video camera can be a digital video camera. Claims include a method of reading a book.