Hollow type planar illuminating device

Details Hollow type planar illuminating device Hollow type planar illuminating device

2011-07-19

2011-07-19

O Shea, Sandra L (Department: 2875)

Illumination

Edge lighted panel

Light modifier for edge lit light source

C362S606000, C362S607000, C362S613000, C362S632000

Reexamination Certificate

active

07980746

ABSTRACT:
A hollow type planar illuminating device having uniform luminance distribution over the entire light emitting is described. A reflecting surface member is arranged on the bottom side of a hollow unit case, a light emitting surface member is arranged on the side facing the reflecting surface member of the unit case, and a space sandwiched between the reflecting surface member and the light emitting surface member of the unit case forms a hollow light guide space. An LED light source unit emits light into the hollow light guide space with a light collecting lens arranged between the LED light source unit and an end surface of the hollow light guide space. The light collecting lens reduces the directivity angle of light emitted from the LED light source unit in the device thickness direction.

REFERENCES:
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patent: 2003/0048639 (2003-03-01), Boyd et al.
patent: 2005/0196123 (2005-09-01), Kumagai
patent: 2007/0153548 (2007-07-01), Hamada et al.
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International Search Report received for International Application No. PCT/JP2008/068221 mailed Nov. 4, 2008.
International Preliminary Examination Report mailed on May 20, 2010, for PCT Application No. PCT/JP2008/068221.

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