H - Electricity – 04 – N
Patent
H - Electricity
04
N
375/49, 345/5
H04N 9/31 (2006.01) G02F 1/11 (2006.01) H04N 3/10 (2006.01)
Patent
CA 1037148
ABSTRACT OF THE DISCLOSURE A video display system comprising a stress wave propagating means defining a viewing plane and including means for initiating the propagation of stress waves along the propagating means in a first scanning direction in the viewing plane. A light emitting means is disposed to emit light along a scan line in a second scanning direction generally perpendicular to the first scanning direction. The light emitting means is disposed in relation to the stress wave propagating means to emit light incident upon each of the stress wave propagated along the propagating means over the extent of the viewing plane in the first scanning direc- tion so that the emitted light interacts with the propagated stress waves over an entire scanning interval in the first scanning direction and so that the light emitted along the scan line in the second scanning direction is scanned in the first scanning direction over the entire viewing plane by the stress waves. The emitted light is selectively modulated in intensity by a video signal resulting in the display of an image in the viewing plane. In one embodiment of the invention, the stress wave propagating means is trans- parent and the light emitting means is disposed to emit light through the propagating means. A first sheet of transparent polarized material is disposed intermediate the propagating means and the light emitting means to linearly polarize light passing therethrough in a first polarization direction. A second sheet of transparent polarized material is disposed in the path of light passing through the first sheet and propagating means and has a polarization axis disposed perpen- dicular to the polarization axis of the first sheet. In another embodiment of the invention, the stress wave propagating means comprises a surface wave propagating medium and surface waves are propagated along a planar sur- face of the medium. The surface of the medium along which surface waves are propagated is light reflective over at least the area of the viewing plane and the light emitting means is disposed to emit light parallel to the planar sur- face of the medium so that the emitted light strikes the propagated wave and is reflect away from the planar surface by the propagated surface waves. A color embodiment and a parallel output feature are also disclosed. - 2 -
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