Illumination device

Details Illumination device Illumination device

2007-02-27

2008-10-14

Husar, Stephen F. (Department: 2875)

Illumination

Illuminated scale or dial

Edge illuminated modifier or light rod/pipe

C362S023000, C362S029000, C362S086000, C362S800000, C362S488000

Reexamination Certificate

active

07434949

ABSTRACT:
An illumination device includes a control knob having a display portion, a tubular case combined with a back side of the control knob, a light guide plate attached to seal an upper opening of the tubular case, and LEDs disposed at a lower opening of the tubular case. Light emitted from the LEDs is applied to the display portion through the light guide plate. A plurality of retaining projections and a plurality of push-up projections are provided on an inner surface of the tubular case adjacent to the upper opening. An upper surface of an outer edge of the light guide plate is retained by lower ends of the retaining projections, and a lower surface of the outer edge is pushed up by upper ends of the push-up projections so that the light guide plate is held inside the tubular case while being bent upwardly.

REFERENCES:
patent: 5093764 (1992-03-01), Hasegawa et al.
patent: 6210010 (2001-04-01), Pontetti et al.
patent: 2006/0072300 (2006-04-01), Hayashi
patent: 2007/0103884 (2007-05-01), Popowich et al.
patent: 2004-228022 (2004-08-01), None

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