Light diffuser containing perimeter light director
AssigneeEastman Kodak Company
InventorsRobert P. Bourdelais, Cheryl J. Kaminsky
Life of this patent
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Abstract
Disclosed is a light diffuser comprising a perimeter area and a central area wherein the perimeter area contains a light director that directs at least a portion of the light incident on it toward the central area.
Claims31
A light diffuser comprising a perimeter area and a central area wherein the perimeter area contains a light director that directs at least a portion of the light incident on it toward the central area.
A method for forming a light diffuser comprising providing a light diffuser comprising forming a transparent polymeric film having a top and bottom surface comprising a plurality of complex lenses on at least one surface thereof and then forming light directors by surface application of heat and pressure to said complex lenses.
A back lighted device comprising a light source and a light diffuser comprising a light director in a perimeter portion thereof and having a diffuse light transmission of at least 75%.
A liquid crystal display device comprising a light source and a light diffuser comprising a light director in a perimeter portion thereof and having a diffuse light transmission of at least 75% wherein the diffuser is located between the light source and a polarizing film.
Dependencies are inferred from the claim text.