Title:
PLANAR LIGHT SOURCE ELEMENT, LIGHT CONTROL MEMBER USING THE SAME, AND IMAGE DISPLAY DEVICE USING THE SAME
Document Type and Number:
WIPO Patent Application WO/2008/029911
Kind Code:
A1
Abstract:
A planar light source element includes a light control member having a first light control
unit formed by a plurality of ribbed convex portions (1) and a second light control
unit formed by a plurality of ribbed convex portions (2). It is assumed that the
length of one cycle of point-shaped light sources in the X-axis direction is D1,
the length of one cycle of the point-shaped light source in the Y-axis direction
is D2, the distance between the point-shaped light sources and the
first light control unit is H1, the distance between the point-shaped
light sources and the second light control unit is H2, the center position
of an arbitrarily selected point-shaped light source is an origin, the position
coordinate in the X-axis direction is X, and the position coordinate in the Y-axis
direction is Y. The ratio of the maximum value against the minimum value of the
light emission intensity of the light incident into the first light control unit
in the direction toward the front surface at X and the light emission intensity
of the light incident into the second light control unit in the direction toward
the front surface at Y in three cycles is not smaller than 0.8. The cross section
of the ribbed convex portions (1) in the X direction has a shape formed having different
inclinations expressed by D1, H1, X and the cross section
of the ribbed convex portions (2) in the Y direction has a shape formed having different
inclinations expressed by D2, H2, Y.
Inventors:
OHTA, Yoshimi (41, Miyukigaoka, Tsukuba-sh, Ibaraki 41, 3050841, JP)
大田 佳実 (〒41 茨城県つくば市御幸が丘４１番地 株式会社クラレ内 Ibaraki, 3050841, JP)
大田 佳実 (〒41 茨城県つくば市御幸が丘４１番地 株式会社クラレ内 Ibaraki, 3050841, JP)
Application Number:
JP2007/067490
Publication Date:
March 13, 2008
Filing Date:
September 07, 2007
Export Citation:
Assignee:
KURARAY CO., LTD. (1621, Sakazu Kurashiki-sh, Okayama 22, 7108622, JP)
株式会社クラレ (〒22 岡山県倉敷市酒津１６２１番地 Okayama, 7108622, JP)
OHTA, Yoshimi (41, Miyukigaoka, Tsukuba-sh, Ibaraki 41, 3050841, JP)
株式会社クラレ (〒22 岡山県倉敷市酒津１６２１番地 Okayama, 7108622, JP)
OHTA, Yoshimi (41, Miyukigaoka, Tsukuba-sh, Ibaraki 41, 3050841, JP)
International Classes:
F21S2/00; F21V5/04; G02F1/13357; F21Y101/02