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US 6,309,074 B1Granted
Backprojection transparency viewer
AssigneeSmartlight Ltd.
InventorsDan Inbar, Eran Shaffir
Life of this patent
Estimating the term…
Abstract
A method of transparency viewing, including: placing a transparency at a viewing surface, forming a light pattern and projecting the light pattern to back-illuminate the transparency. Preferably, the light pattern is formed by spatially modulating a beam of light using a plurality of light valves.
Claims48
A method of transparency viewing comprising:
- placing a transparency at a viewing surface;
- forming a non-uniform light pattern;
- and
- projecting the non-uniform light pattern to back illuminate the viewing surface therewith.
1 more element
A viewing box comprising:
- a display surface adapted for mounting a transparency thereon;
- a light modulator which modulates light to form a non-uniform light pattern on the display surface;
- and
- a projector which back projects the non-uniform light pattern onto the display surface.
1 more element
A viewbox comprising:
- a display surface adapted for mounting a transparency thereon;
- a light modulator which modulates light to form a non-uniform masking pattern, comprising:
- a plurality of light valves;
- and
- a low-loss polarizer which polarizes light entering said plurality of light valves;
- and
- a projector which projects the non-uniform masking pattern onto the display surface to back illuminate the masking surface with the projected non-uniform masking pattern.
4 more elements
Dependencies are inferred from the claim text.