Sheet-shaped lightguide member, operation panel-lighting device and electronic device
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United States of America Patent
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Aug 2, 2011
Grant Date -
Jun 18, 2009
app pub date -
Dec 11, 2008
filing date -
Dec 12, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A sheet-shaped lightguide member has a first surface (11A), which is divided into at least two areas. The sheet-shaped lightguide member has the first surface (11A) and a second surface (11B) that face each other and a peripheral edge surface (11C). The lightguide member receives light through at least a part of the peripheral edge surface, guides the light, and emits the guided light from the first surface (11A) serving as a light exit surface. The lightguide member is divided into the at least two light exit areas (14A, 14B) and has a light-blocking part (18) provided along a boundary between mutually adjacent light exit areas to block transmission of light between the adjacent light exit areas.
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