| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a composite light control plate which uniformly disperses light from a light source. <P>SOLUTION: In the composite light control plate having first and second light control plates having protrusions which are arranged in parallel in a direction orthogonal to an extending direction arranged in this order, the extending directions of the first and second protrusions are parallel with one another, and a cross-sectional shape orthogonal to the extending directions of the respective protrusions of the first and second light control plates are as follows: in the first protrusion, when an axis line in a parallel direction of the protrusion is represented by a u<SB POS="POST">I</SB>axis, an axis line orthogonal to the u<SB POS="POST">I</SB>axis is represented by a v<SB POS="POST">I</SB>axis, a length in a u<SB POS="POST">I</SB>axis direction of the protrusion is represented by w<SB POS="POST">Ia</SB>, a base angle formed by the u<SB POS="POST">I</SB>axis and the protrusion is represented by α, a length in a v<SB POS="POST">I</SB>axis direction of the protrusion is represented by h<SB POS="POST">Ia</SB>, and a tip curvature radius of the protrusion is represented by R, the first protrusion satisfies the following formulae (1) to (3); in the second protrusion, when an axis line in a parallel direction of the protrusion is represented by a u<SB POS="POST">II</SB>axis, an axis line orthogonal to the u<SB POS="POST">II</SB>axis is represented by a v<SB POS="POST">II</SB>axis, and a length in a u<SB POS="POST">II</SB>axis direction of the protrusion is represented by w<SB POS="POST">IIa</SB>, the second protrusion satisfies a predetermined relation in a range of -0.475w<SB POS="POST">IIa</SB>≤u<SB POS="POST">II</SB>≤0.475w<SB POS="POST">IIa</SB>. <P>COPYRIGHT: (C)2012,JPO&INPIT |
