Title:
光拡散板及びそれを用いた照明装置
Document Type and Number:
Japanese Patent JP4977021
Kind Code:
B2
Abstract:
A light diffusing plate integrally formed with an optical element array on the front and rear surfaces thereof, and a direct lighting device having this light diffusing plate installed on a light reflection plate having a box type shape and provided therein with a light source, whereby a light diffusing plate and a thin direct lighting device are provided which eliminate luminance non-uniformity among a number of light sources (inter-light-sources distance) at a practical level (making luminance uniform), and realize higher luminance (delivering luminance equal to that when conventional prism sheets are laminated).
Inventors:
Hiroshi Kawahigashi
Mami Kogure
Mami Kogure
Application Number:
JP2007522347A
Publication Date:
July 18, 2012
Filing Date:
June 21, 2006
Export Citation:
Assignee:
IDEMITSU KOSAN CO.,LTD.
International Classes:
F21V5/04; F21S2/00; F21V5/00; F21V7/00; F21Y101/02; F21Y103/00
Domestic Patent References:
| JP2005043516A | 2005-02-17 | |||
| JP2004192912A | 2004-07-08 | |||
| JPH04275526A | 1992-10-01 | |||
| JP2005157296A | 2005-06-16 | |||
| JP2004265709A | 2004-09-24 | |||
| JPH10282336A | 1998-10-23 | |||
| JPH08114704A | 1996-05-07 | |||
| JPH10260302A | 1998-09-29 |
Attorney, Agent or Firm:
Tamotsu Otani
Masamichi Tohei
Masamichi Tohei