LENS SHEET AND DISPLAY DEVICE HAVING THE SAME

摘要

PROBLEM TO BE SOLVED: To solve problems of a lens sheet having lenticular lenses or so-called fly-eye lenses arranged that it is difficult to improve the front luminance and image contrast as well as the viewing angle. SOLUTION: The lens layer 2 of the lens sheet is formed as a mixture of lenses 2 having high luminance lenses and lenses 2b having a wide viewing angle. In the lens 2a having high luminance, the luminance measured in the direction apart by 40 deg. from the normal direction is <=0.5 time as the luminance measured in the normal direction. In the lens 2b having a wide viewing angle, the luminance measured in the direction apart by 40 deg. from the normal direction is >=0.7 time as the luminance measured in the normal direction.