Sheet-shaped lightguide member, operation panel-lighting...

Details Sheet-shaped lightguide member, operation panel-lighting... Sheet-shaped lightguide member, operation panel-lighting...

2011-08-02

2011-08-02

Husar, Stephen F (Department: 2875)

Illumination

Illuminated scale or dial

Edge illuminated modifier or light rod/pipe

C362S023000, C362S024000, C362S027000, C362S602000, C362S612000

Reexamination Certificate

active

07988310

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.

REFERENCES:
patent: 6026283 (2000-02-01), Stephenson
patent: 6074070 (2000-06-01), Sasako
patent: 7407314 (2008-08-01), Hsu et al.
patent: 7543971 (2009-06-01), Lee et al.
patent: 7572023 (2009-08-01), Chen
patent: 7740390 (2010-06-01), Lee et al.
patent: 7794130 (2010-09-01), Chung et al.
patent: 2007/0062793 (2007-03-01), Hung
patent: 2009/0154138 (2009-06-01), Isoda et al.
patent: 2001-167655 (2001-06-01), None

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