Patent ID: 7015982
Filing Date: 2006-03-21
Classification: H04N

Abstract:
1. A video projection system ( 30 ) comprising means ( 36 , 46 ) for generating a coloured light bundle coloured according to a video signal and means ( 31 , 35 ) for line scanning the bundle onto a screen ( 48 ) thereby producing images on the screen ( 48 ), the system ( 30 ) also including a disc ( 31 ) adapted to rotate on an axis ( 32 ) extending through a centre of the disc ( 31 ) and at right angles to a plane of the disc ( 31 ), the system ( 30 ) also including means for enlarging a horizontal projection angle, characterised in that the disc ( 31 ) carries a plurality of light guiding devices ( 35 ) extending radially of the disc ( 31 ) and spaced one from another in an angular direction in the plane of the disc ( 31 ) and each device ( 35 ) extending at an angle to the plane of the disc ( 31 ) in a corresponding plane perpendicular to the plane of the disc ( 31 ) so that each device ( 35 ) projects a corresponding one of the lines scanning a video image onto the screen ( 48 ) and characterised in that the means for enlarging the horizontal projection angle includes a combination of mirrors for receiving a light bundle from a light guiding device ( 35 ) and for reflecting the light bundle onto the screen ( 48 ), said combination of mirrors including a toroidal mirror.