Projection screen of retractable type
AssigneeAdvance Engineering, Inc.
InventorPatrice Bernard François Congard
Life of this patent
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Abstract
A projection screen apparatus for reproducing the coherence between a visual image and associated acoustic signals. The projection screen apparatus includes a sound broadcasting device and screen that is transparent to sound waves disposed between the sound broadcasting device and the audience, whereby the projection of video and sound broadcasting are simultaneously implemented with respect to the audience. The screen includes multiple layers of white fabric that are superimposed and joined together such that the screen provides a surface that is both transparent to sound and sufficiently opaque to view a projected image.
Claims15
A projection screen apparatus comprising a screen member having a roll-up end and a weighted end opposite said roll-up end;
- and at least two layers of material superimposed and joined together whereby said screen member is transparent to sound waves.
A projection screen apparatus comprising:
- a screen member having a roll-up end;
- a weighted end opposite said roll-up end;
- and at least two layers of white fabric that are superimposed and joined together whereby said screen member is transparent to sound waves;
- a sound broadcasting device disposed in a direction away from said screen member;
- and
- means for retracting said screen member.
Dependencies are inferred from the claim text.