Title:
OPTICAL SHEET, AREA LIGHT SOURCE DEVICE, AND TRANSMISSION IMAGE DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/039432
Kind Code:
A1
Abstract:
Provided are an optical sheet capable of dispersing light with sufficient uniformity from a point light source, an area light source device, and a transmission image display device. An optical sheet (30) formed from a light-transmitting translucent resin and taking the shape of a sheet, is provided in a structure comprising: a lateral surface (33) into which light emitted from a point light source (22) enters; and an emitting surface (31) which is formed in a direction intersecting the lateral surface, and which emits a plane of light. On the lateral surface (33), protruding parts (35) extending out in the thickness direction of the sheet are positioned in alignment with the longitudinal direction Y of the lateral surface (33).
Inventors:
OKU HISANORI (JP)
KAWAKAMI TAKESHI (JP)
KAWAKAMI TAKESHI (JP)
Application Number:
PCT/JP2011/071510
Publication Date:
March 29, 2012
Filing Date:
September 21, 2011
Export Citation:
Assignee:
SUMITOMO CHEMICAL CO (JP)
OKU HISANORI (JP)
KAWAKAMI TAKESHI (JP)
OKU HISANORI (JP)
KAWAKAMI TAKESHI (JP)
International Classes:
F21S2/00; G02F1/13357; F21Y101/02
Domestic Patent References:
| WO2009001802A1 | 2008-12-31 |
Foreign References:
| JP2009158424A | 2009-07-16 |
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (JP)
Yoshiki Hasegawa (JP)
Yoshiki Hasegawa (JP)
Download PDF:
Claims: