| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light-control sheet that makes it possible to illuminate a display screen so that the brightness of the screen is uniform without unevenness regardless of the position (direction) from which the screen is viewed, particularly, a light-controlling sheet that causes gradual luminance variation even at large exit angles, and a surface illuminant unit. <P>SOLUTION: The light-control sheet 14 is arranged on a direct surface illuminant unit and makes light emitted from light sources uniform and/or converges the light. The light-control sheet includes a large number of unit lenses 141 arranged in parallel, with a lens surface of each unit lens protruding to the light-exiting side. A cross section of the lens surface of each unit lens taken perpendicularly to the sheet surface is asymmetrical. The unit lens 141 is equipped with a lower side shape 141D formed of a flat surface and an upper side shape 141U formed of a curved surface. <P>COPYRIGHT: (C)2007,JPO&INPIT |
