large video screen; jumbotron
Refers to a very large outdoor or stadium video display used for advertising, sports broadcasts, and public events. ビジョン here is wasei-eigo for 'video screen'.
The news was playing on the large video screen in front of the station.
The players' faces were shown on the stadium's jumbotron.
Compound of 大型 (large-scale) and ビジョン, a wasei-eigo use of 'vision' meaning 'video screen'.