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US 2014/0208624 A1Published application
Self illuminated signage for printed graphics
Assignee3M Innovative Properties Company
InventorErik A. Aho
Life of this patent
Estimating the term…
Abstract
Self illuminated back and front lit signage for a printed graphic. The signage includes a turning film having a structured surface for redirecting light, a diffuser providing for diffusion, and a printed graphic. The turning film receives light from an ambient light source and directs the light via the structured surface toward a viewer of the graphic in order to passively illuminate the signage.
Claims19
A self illuminated back lit sign, comprising:
- a turning film having a first structured surface for redirecting light and a second surface opposite the first surface;
- a first diffuser on the second surface of the turning film and providing for diffusion in at least a first direction;
- and
- a graphic on a side of the first diffuser opposite the turning film,
- wherein the turning film directs light via the first structured surface from behind the sign toward a viewer of the graphic in order to passively illuminate the sign.
2 more elements
A self illuminated front lit sign, comprising:
- a diffuser for providing diffusion in at least one direction;
- a graphic on the diffuser;
- a turning film having a first structured surface for redirecting light and a second surface opposite the first surface, wherein the turning film is on a side of the graphic opposite the diffuser and the first structured surface faces the graphic;
- and
- a reflector on the second surface of the turning film,
- wherein the turning film directs light via the first structured surface from in front of the sign toward a viewer of the graphic in order to passively illuminate the sign.
3 more elements
A self illuminated front lit sign, comprising:
- a turning film having a first structured surface for redirecting light and a second surface opposite the first surface;
- a diffuser on the second surface of the turning film and providing for diffusion in at least one direction;
- a graphic on the first structured surface of the turning film;
- and
- a reflector on a side of the diffuser opposite the turning film,
- wherein the turning film directs light via the first structured surface from in front of the sign toward a viewer of the graphic in order to passively illuminate the sign.
3 more elements
Dependencies are inferred from the claim text.