INFORMATION DISPLAY SYSTEM

摘要

An information display system which can produce an information display (e.g. on a television monitor) from any one of a plurality of different information sources. The information sources are associated with different facilities such as teletext and viewdata. In order to obtain information from a particular information source, the associated facility option is selected from the available facility options by selecting from the television screen "nested" areas which pertain to one or more facility options. The selection can be effected using a touch-sensitive screen which overlies the television screen. The selection process may comprise the display of a number of successive display frames containing "nested" areas. The selection of an area in one frame produces a fresh display frame which redefines areas which are nested within the selected area.