| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical sheet, a backlight unit, and a display, capable of enhancing a light use efficiency and capable of restraining luminous energy from getting low by photoabsorption. <P>SOLUTION: This display or the like includes a planar base material 2, an the first and second lens arrays 3, 4 provided on one face of the base material 2, the first lens array 3 includes a plurality of the first lenses 5 extended along an X-direction on the one face and arranged in parallel each other, the second lens array 4 includes a plurality of the second lenses 6 extended along a Y-direction on the one face and arranged in parallel each other, the second lenses 6 have a plurality of sub-lenses 7 arranged in valley parts of the plurality of first lenses 5, a height T1 is a height T2 or more, a pitch P1 is a pitch P2 or more, W1/P1 is 0.5 or more to 0.8 or less, W2/P2 is 0.8 or more to 1 or less, and an angle formed by the X-direction and the Y-direction is 60° or more to 120° or less. <P>COPYRIGHT: (C)2009,JPO&INPIT |
