Improvements relating to broadcast data receiving apparatus

摘要

The invention relates to a television system which includes a broadcast data receiver for processing received data and generating television programmes via a display screen and generating on the screen a range of user selectable function or modes of operation of the system. The user makes the selection using a control device which includes light detection means and which can be pointed at the screen to define a particular option to be selected. When the electron or CRT beam of the screen passes through the field of vision of the light detecting device, the location on the screen is determined and, with comparison to the know location of the selectable options on the screen, the appropriate option is selected and performed.