Title:
面状照明装置とそれを用いた液晶表示装置
Document Type and Number:
Japanese Patent JP4881321
Kind Code:
B2
Abstract:
The present invention provides a planar lighting device (1) including: a laser light source (12) which emits a linearly-polarized laser beam; an optical member (13) which receives the laser beam, then parallelize the laser beam, and emits the parallelized laser beam; and a first plate-shaped light guide (20) which receives the parallelized laser beam from an end face portion (20d) and emits the parallelized laser beam from a first major surface (20b). The first light guide includes an optical element (20a) which receives the linearly-polarized parallelized laser beam propagated through the first light guide and emits at least a part of the linearly-polarized parallelized laser beam in a direction substantially vertical to the first major surface. The present invention also provides a liquid crystal display device (3) using the planar lighting device (1) as a backlight lighting device.
Inventors:
Tetsuro Mizushima
Kenichi Kasumi
Tatsuo Ito
Kazuhisa Yamamoto
Shinichi Kadowaki
Kenichi Kasumi
Tatsuo Ito
Kazuhisa Yamamoto
Shinichi Kadowaki
Application Number:
JP2007551967A
Publication Date:
February 22, 2012
Filing Date:
December 25, 2006
Export Citation:
Assignee:
Panasonic Corporation
International Classes:
F21S2/00; G02F1/13357; F21Y101/02
Domestic Patent References:
| JP2005157025A | ||||
| JP2005243412A | ||||
| JP2003215318A | ||||
| JP2005300697A | ||||
| JP62109003A | ||||
| JP9189907A | ||||
| JP2005332719A | ||||
| JP11287993A | ||||
| JP9265085A | ||||
| JP200519066A |
Attorney, Agent or Firm:
Takuji Yamada
Mitsuo Tanaka
Kawabata Junichi
Mitsuo Tanaka
Kawabata Junichi