Back projection unit has projector and transparent screen having mirror chain reflecting light from the projector through a gap behind the screen and at an acute angle to the transparent screen

摘要

A back projection unit has a projector (15) and transparent screen (13) has a mirror chain (21, 22, 23) reflecting light (27) from the projector (15) through a gap (24) behind the screen and at an acute angle to the transparent screen (13) then up and onto it.