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US 2009/0211130 A1Published application
Thin internally illuminated sign
Assignee3M Innovative Properties Company
InventorsJoseph A. Hoffman, Ellen O. Aeling, Michael A. Meis
Life of this patent
Estimating the term…
Abstract
An internally illuminated sign includes a case at least partially lined with highly reflective layer and a display surface. The sign also includes light sources that emit light in directions approximately parallel to the display surface.
Claims18
An internally illuminated sign comprising:
- A case having an inner surface said inner surface being at least partially lined with a highly reflective layer;
- A display surface having an output aperture a portion of said display surface being lined with a highly reflective material;
- and
- A point light source positioned to emit light in a direction approximately parallel to the display surface.
1 more element
An internally illuminated sign comprising:
- A case having an inner surface said inner surface being at least partially lined with a highly reflective layer;
- A display surface having an output aperture a portion of said display surface being lined with a highly reflective material;
- and
- A point light source positioned to emit light in a direction such that substantially all of said light is reflected at least once by said inner surface before said light escapes from said internally illuminated sign.
1 more element
An internally illuminated sign comprising:
- A case having an inner surface said inner surface being at least partially lined with a highly reflective layer;
- A display surface having an output aperture a portion of said display surface being lined with a highly reflective material;
- and
- A point light source positioned to emit light in a direction toward a portion of said display surface that is lined with highly reflective material.
1 more element
Dependencies are inferred from the claim text.