A plasma screen
is a large widescreen monitor, from 32" to 84" in
size, which has the advantage of being very thin
so that it can be hung on walls. Plasma screens
can be used with computers and video recorders/DVD
players etc. A plasma screen overlay is a device
that fits over a plasma screen. Plasma screens that
have an interactive overlay on them work in exactly
the same way as interactive whiteboards. The advantage
of using a plasma screen is that a shadow is not
cast by the presenter, unlike front projection interactive
whiteboards. Plasma screens also have a lifespan
of around 30,000 hours use. Projectors used with
interactive whiteboards have an average of 2,000
hours lamp life and lamps for most projectors are
costly to replace. The biggest disadvantage with
the plasma screen is the screen size and the high
price. However, Plasma screens give a far neater
finish in a boardroom environment and far superior
pictures when using video recorders, satellite systems
or DVD players to show television or video. |