Eastman-kodak Company

Skc Haas Display Films Co., Ltd.

Louis P Harasta, Jr

Robert P Bourdelais

Xiang-Dong Mi

Jehuda Greener

Tomohiro Ishikawa

Richard Dominic Bomba

Gerald G Reafler

Robert L Walton

Stephen C Meissner

John M Palmeri

Newton C Landis

Herong Lei

Steven J Neerbasch

Michael L Ferranti

A backlight device for a display comprising (1) a side-lit light source, (2) a light guide plate and (3) a turning film comprising a light entry and a light exit surface comprising lenticular elements on the exit surface and prismatic structures on the entry surface, wherein the average values of the parameters of the features and the thickness of the film are selected to provide a peak output angle of &#xb1;10&#xb0; from normal to the light exit surface of the light guide plate and an optical gain of at least 1.25. Also disclosed are methods of making the turning film and a display incorporating the backlight.

Double-sided turning film

An adhesive-coated thermoplastic film is stretched and bonded to a three-dimensional substrate by vacuum thermoforming at a lower than normal temperature, at which the film has an elastic modulus of at least 10.sup.9 dynes/cm.sup.2, followed by moderate heat treatment of the resulting laminated article. The procedure is especially useful in avoiding air entrapment and peel-back in the thermoforming of a paint-coated film on exterior body panels for automobiles.

Thermoforming method

Growing community of inventors

Webster, NY, United States of America

Louis P Harasta, Jr