Abstract: An optical turning film has a first surface including an array of prisms. The array has a plurality of first prisms, with each of the first prisms having a first prism configuration, and a plurality of second prisms, with each of the second prisms having a second prism configuration different from the first prism configuration. The optical film also has a second surface opposing the first surface, and light rays incident to the first surface are directed by the plurality of first prism and the plurality of second prisms along a direction substantially parallel to a viewing axis.
Type:
Grant
Filed:
January 16, 2002
Date of Patent:
May 6, 2003
Inventors:
Mark E. Gardiner, Sanford Cobb, Kenneth A. Epstein, Wade D. Kretman