Title:
LIGHT GUIDE PLATE, ILLUMINATION DEVICE, AND LIQUID CRYSTAL DISPLAY DEVICE
Document Type and Number:
Japanese Patent JP3917399
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a light guide plate which has small loss of light and can increase illumination efficiency.
SOLUTION: The light guide plate is equipped with a transparent member 20 which has a top surface 20a and a reverse surface 20b and 1st and 2nd flanks 22a and 22c extending in (x) and (y) directions crossing each other to connect with each other; and a partial area of the transparent member 20 is a light projection area S1 in which light traveling in the transparent member 20 in the (x) direction is projected out from the top surface 20a or reverse surface 20b and another partial area of the transparent member 20 is a light guide area S2 in which light entering the transparent member 20 from a light incidence surface part 24 provided on the 1st flank 22a is reflected by the 2nd flank and then guided to the light projection area S1. In the light guide area S2, a hole 26 forming a mirror surface 26a extending in the (y) direction at an interval to the 2nd flank 22c in the (x) direction is provided.
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Inventors:
Nakaoka Yasunari
Takayuki Ishihara
Masanori Komura
Takayuki Ishihara
Masanori Komura
Application Number:
JP2001313489A
Publication Date:
May 23, 2007
Filing Date:
October 11, 2001
Export Citation:
Assignee:
ROHM Co., Ltd.
International Classes:
G02B6/00; G02F1/13357; F21V8/00; F21Y101/02; (IPC1-7): G02B6/00; F21V8/00; G02F1/13357; //F21Y101:02
Domestic Patent References:
| JP11231321A | ||||
| JP11185515A | ||||
| JP2001250415A | ||||
| JP2001236811A | ||||
| JP2001281456A | ||||
| JP2001255415A | ||||
| JP2003086016A | ||||
| JP2003109419A | ||||
| JP2001210124A |
Attorney, Agent or Firm:
Minoru Yoshida
Tatsuya Tanaka
Yoshikazu Fukumoto
Takashi Shiotani
Hiroshi Furusawa
Tatsuya Tanaka
Yoshikazu Fukumoto
Takashi Shiotani
Hiroshi Furusawa