| 摘要 |
PROBLEM TO BE SOLVED: To provide a lenticular lens sheet that has a wide view angle and excels in outdoor daylight contrast. SOLUTION: The lenticular lens sheet 11 includes: an incident side lens 112 having a lens pitch of 0.4 mm or less; an outgoing side lens 113 having a distance of 0.4 mm or more between its top and the top of the incident side lens 112; and an outside light absorbing part 114 having the proportion of its area to the emission face is 50% or more. The outside light absorbing part 114 is a straight line parallel to a tangent touching the edge of the outgoing side lens 113. If a straight line passing through the middle of the outgoing side lens 113 is L1, the outside light absorbing part 114 is constantly located nearer to an incident face than to the straight line L1. Light entering perpendicular to a sheet face satisfiesΔθ2/Δθ1≥1 around the optical axis of the incident side lens 112 within 80% or less of the width of the lens pitch of the incident lens 112. COPYRIGHT: (C)2008,JPO&INPIT
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