Title:
LIGHT CONTROL PLATE UNIT, AREA LIGHT SOURCE DEVICE, AND TRANSMISSIVE IMAGE DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/132639
Kind Code:
A1
Abstract:
Disclosed are a light control plate unit, an area light source device, and a transmissive image display device, which are capable of adequately uniformly diffusing light from point light sources. An area light source device (10) comprises a plurality of point light sources (22), provided with a prescribed light distribution value; and a light control plate unit (20) that includes a first and second light control plate (301, 302). In the area light source device (10), a plurality of protrusion parts (331, 332) are positioned in parallel upon the upper faces (321, 322) of the two light control plates, said protrusion parts (331, 332) extending in a single direction. The extension directions of the protrusion parts (331, 332) are approximately orthogonal. With the axis that traverses both ends of each cross-section of the protrusion parts (331, 332) designated the u-axis, and the axis that traverses the center between the ends thereof and is orthogonal to the u-axis designated the v-axis, the contour shape v(u) of the cross-section satisfies the formula 0.95v0(u) ≤ v(u) ≤ 1.05v0(u), wherein v0(u) satisfies formula (1), wherein wa is the length of the protrusions (331, 332) in the u-axis direction, 0.40wa ≤ ha ≤ 1.60wa, and -1.00 ≤ ka ≤ 0.25.
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Inventors:
OHTA Hirofumi (13-36-417, Isoura-cho Niihama-sh, Ehime 02, 〒7920002, JP)
太田 寛史 (〒02 愛媛県新居浜市磯浦町１３－３６－４１７ Ehime, 〒7920002, JP)
KAWAGUCHI Yujiro (13-36, Isoura-cho Niihama-sh, Ehime 02, 〒7920002, JP)
太田 寛史 (〒02 愛媛県新居浜市磯浦町１３－３６－４１７ Ehime, 〒7920002, JP)
KAWAGUCHI Yujiro (13-36, Isoura-cho Niihama-sh, Ehime 02, 〒7920002, JP)
Application Number:
JP2011/059534
Publication Date:
October 27, 2011
Filing Date:
April 18, 2011
Export Citation:
Assignee:
SUMITOMO CHEMICAL COMPANY, LIMITED (27-1, Shinkawa 2-chome Chuo-k, Tokyo 60, 〒1048260, JP)
住友化学株式会社 (〒60 東京都中央区新川二丁目２７番１号 Tokyo, 〒1048260, JP)
OHTA Hirofumi (13-36-417, Isoura-cho Niihama-sh, Ehime 02, 〒7920002, JP)
太田 寛史 (〒02 愛媛県新居浜市磯浦町１３－３６－４１７ Ehime, 〒7920002, JP)
住友化学株式会社 (〒60 東京都中央区新川二丁目２７番１号 Tokyo, 〒1048260, JP)
OHTA Hirofumi (13-36-417, Isoura-cho Niihama-sh, Ehime 02, 〒7920002, JP)
太田 寛史 (〒02 愛媛県新居浜市磯浦町１３－３６－４１７ Ehime, 〒7920002, JP)
International Classes:
F21S2/00; F21V5/04; G02B5/02; F21Y101/02
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (SOEI PATENT AND LAW FIRM, Marunouchi MY PLAZA 9th fl. 1-1, Marunouchi 2-chome, Chiyoda-k, Tokyo 05, 〒1000005, JP)
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Claims: