Illumination – Revolving
Patent
1990-07-30
1991-12-03
Lazarus, Ira S.
Illumination
Revolving
362 26, 362 27, 362 30, 362800, F21V 1300
Patent
active
050704311
ABSTRACT:
A display board illuminating device includes a light guide plate arranged to face the back of a display board and a light source disposed to face the side end of the light guide plate. The side end of the light guide plate is inclined toward the center of the light guide plate in the direction of the display board. By this configuration an angle of an optical axis refracted at the surface of the side end and incident into the light guide plate with respect to a main surface of the light guide plate, so that the whole area of the display board is illuminated efficiently.
REFERENCES:
patent: 2712593 (1955-07-01), Merchant
patent: 3561145 (1971-02-01), Shotwell
patent: 4257084 (1981-03-01), Reynolds
patent: 4258643 (1981-03-01), Ishikawa
patent: 4453220 (1984-06-01), Trcka et al.
patent: 4630895 (1986-12-01), Abdala, Jr. et al.
patent: 4874228 (1989-10-01), Aho et al.
patent: 4890201 (1989-12-01), Toft
patent: 4903171 (1990-02-01), Livezey et al.
patent: 4929062 (1990-05-01), Guzik et al.
patent: 4933814 (1990-06-01), Sanai
Kayama Tsutomu
Kitazawa Hideki
Nagai Yoshiaki
Takeuchi Shogo
Tanimoto Kohichi
Lazarus Ira S.
Pioneer Electronic Corporation
Quach Y.
LandOfFree
Display board illuminating device for passive displays does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Display board illuminating device for passive displays, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Display board illuminating device for passive displays will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1700174