Illumination – Revolving
Patent
1995-08-29
1999-10-19
O'Shea, Sandra
Illumination
Revolving
362 26, 385146, 385901, 264 11, 264 124, 264 5, F21Y 704, G02B 610
Patent
active
059676370
ABSTRACT:
There is provided a very thin light guide plate for a surface light source device and a method of manufacturing it without the use of high-precision molding machine. A surface light source device using this light guide plate generates outgoing light having high uniformity. According to the manufacturing method, a light guide plate free from a weld line or warp can be manufactured with good transferring characteristics. The light guide plate is thick on an incident surface 1 side and thin on a lower surface 4 side. At the central portion of an incident surface 1 in a longitudinal direction, a projecting portion obtained by cutting an overhang portion 7 at a position a distance D apart from the incident surface 1 is formed. The cut surface of the projecting portion is not made specular and is kept rough. In molding of the light guide plate, a molten material is supplied from the position of a gate mark 9. After molding, the overhang portion 7 is cut off by an ordinary cutter, thereby obtaining a light guide plate.
REFERENCES:
patent: 5499165 (1996-03-01), Holmes, Jr.
patent: 5550676 (1996-08-01), Ohe et al.
Ishikawa Tsuyoshi
Yamazaki Hiroshi
DelGizzi Ronald E.
Enplas Corporation
O'shea Sandra
LandOfFree
Tapered light guide plate for surface light source device and me does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Tapered light guide plate for surface light source device and me, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tapered light guide plate for surface light source device and me will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2047174