Tunnel visions

日期:2017-10-04 07:13:17 作者:狄堰 阅读:

By Barry Fox Timothy Cowin of Shropshire wants to make underground train journeys more entertaining (GB 2 317 985). The wall of a tunnel is divided into a series of screens, each displaying one frame of a moving picture sequence. The displayed images change at a rate determined by the speed of the train, so passengers see a rapid succession of different images. If the display runs at 15 images a second or more,