Title:
面光源装置
Document Type and Number:
Japanese Patent JP4614012
Kind Code:
B2
Abstract:
A planar light source device is provided which has high light extraction efficiency and in which a change in color tone at different viewing angles is small. The planar light source device includes, on a light emitting surface, a concavo-convex structure layer made of a resin composition. In this planar light source device, the concavo-convex structure layer has a cone, pyramid, or prism shape, and the resin composition contains a transparent resin and particles. In particular, in the planar light source device, variations in any of x- and y-chromaticity coordinates in any directions in a hemisphere on the light emitting surface are within ±0.1, the diameter of the particle is 10 µm or less, and the amount of the particles is 1 to 40 wt% based on the total amount of the resin composition. In addition, the difference in refractive index between the particles and the transparent resin is 0.05 to 0.5.
Inventors:
Yasumi Yamada
Hiroyasu Inoue
Hiroyasu Inoue
Application Number:
JP2009547031A
Publication Date:
January 19, 2011
Filing Date:
December 11, 2008
Export Citation:
Assignee:
Zeon Corporation
International Classes:
H05B33/02; H01L51/50
Domestic Patent References:
| JP2003100444A | 2003-04-04 | |||
| JP2004054035A | 2004-02-19 | |||
| JP2003197364A | 2003-07-11 | |||
| JP2006252866A | 2006-09-21 | |||
| JP2007005277A | 2007-01-11 |
Attorney, Agent or Firm:
Hiroaki Sakai