OPTICAL SHEET

WIPO Patent Application WO/2012/147741

A1

The present invention provides an optical sheet (30), which can make printed dots (38) formed on the back surface thereof difficult to see from the front surface side, and a surface light source device (20) and transmissive image-display device (1) provided with the same. The optical sheet, which is formed from a light-transmissive resin, is provided with side surfaces (33) to which light from a light source (22) is incident, a light output surface that is formed in a direction orthogonal to the side surfaces and outputs light in a planar shape, a back surface on the opposite side from the light output surface, dots printed on that back surface and printed by inkjet printing so as to reflect light incident from the side surfaces toward the light output surface side, and a plurality of protruding shaped parts formed on the light output surface, capable of outputting light incident from the side surfaces, and disposed so as to extend in one direction and be lined up in a direction orthogonal to that one direction. The protruding shaped parts are constituted so as to satisfy equation (1). H × T/P ≥ 0.37 ... (1). Here, P is the interval (µm) between adjacent protruding shaped parts; H is the height (µm) of the protruding shaped parts; and T is the thickness (mm) of the sheet.

HAMAMATSU TOYOHIRO (JP)
NISHINO SHOTARO (JP)
KAWAGUCHI YUJIRO (JP)

PCT/JP2012/060973

November 01, 2012

April 24, 2012

Click for automatic bibliography generation  

SUMITOMO CHEMICAL CO (JP)
HAMAMATSU TOYOHIRO (JP)
NISHINO SHOTARO (JP)
KAWAGUCHI YUJIRO (JP)

F21S2/00; G02F1/13357; F21Y101/02

JP2010177130A	2010-08-12
JP2009087762A	2009-04-23

HASEGAWA Yoshiki et al. (JP)
Yoshiki Hasegawa (JP)

View/Download PDF      PDF Help

Previous Patent: IMAGE ENCODING DEVICE, IMAGE ENCODING METHOD, IMAGE ENCODING PROGRAM, IMAGE DECODING DEVICE, IMAGE D...

Next Patent: FABRICATION METHOD FOR STEPPED FORGED MATERIAL