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US 6,598,328 B2Granted
Sign faces having reflective films and methods of using same
Assignee3M Innovative Properties Company
InventorsEllen O. Aeling, Frank L. Deyak, Sanford Cobb, Jr.
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Abstract
A lighted sign housing is provided having a sign face with both light-transmissive portions and light-blocking portions; and a reflective film applied to at least a portion of the light-blocking portions toward the interior of the sign housing. A method of using the reflective film is also provided.
Claims9
A lighted sign housing, comprising:
- (a) a sign face having both light-transmissive portions and light-blocking portions;
- (b) a highly reflective film applied to at least a portion of the light-blocking portions of an interior surface of the sign face, wherein the highly reflective film is selected from the group consisting of a diffuse reflective film, a specular reflective film having a diffuse film laminated thereto and a specular reflective film having a diffused coating coated thereto;
- and
- (c) interior walls having a highly reflective film applied thereto, wherein the highly reflective film is selected from the group consisting of a diffuse reflective film, a specular reflective film having a diffuse film laminated thereto and a specular reflective film having a diffused coating coated thereto,
- wherein the highly reflective film applied to the interior walls and the highly reflective film applied to at least a portion of the light-blocking portions of the interior surface increase the average luminance of light passing through the light-transmissive portions and also provide enhanced luminance uniformity on the light-transmissive portions in comparison to a lighted sign housing having non-diffuse reflective films.
2 more elements
Dependencies are inferred from the claim text.