Method of producing lightguide plate for surface light source, lightguide plate for surface light source and surface light source using the same
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United States of America Patent
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Oct 17, 2000
Grant Date -
N/A
app pub date -
Nov 1, 1996
filing date -
Nov 2, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a method of producing a lightguide plate for surface light source according to the present invention, a plate-shaped metal mold for defining the shape of a part of a cavity of a molding die and particularly, the shape of a light emitting surface of the lightguide plate for surface light source (a concavo-convex shape, a lenticular lens shape, etc.) is provided so as to be replaceable, to form a cavity having a desired shape by the replacement of the plate-shaped metal mold. Resin liquid is injected into the cavity, its resin liquid is solidified, and the resin is then released from the cavity. Consequently, a lightguide plate for surface light source having a desired shape and particularly, having its light emitting surface in a desired shape is produced.
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