Spread illuminating apparatus

Details Spread illuminating apparatus Spread illuminating apparatus

2007-07-24

2007-07-24

Alavi, Ali (Department: 2875)

Illumination

Edge lighted panel

Light guide

Reexamination Certificate

active

11074700

ABSTRACT:
A side light type spread illuminating apparatus comprises: a light conductive plate having a plurality of prisms formed on a light exit surface thereof, point light sources; and a prism sheet disposed on the light conductive plate, wherein the prisms have respective circular arc configurations with a common curvature in cross section taken along a line orthogonal to the direction the prisms extend, and are arrayed such that distances each defined between apexes of adjacent two of the prisms differ irregularly from one another within a range of 10 to 200 μm, and such that overall tangential angles at respective ends of the prisms vary irregularly within a range of 40 to 70 degrees, and wherein the respective ridges of the prisms are located on a common virtual plane, whereby the prism sheet are supported evenly by all of the prisms of the light conductive plate.

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patent: 2004/0120139 (2004-06-01), Kunimochi et al.
patent: A 10-253960 (1998-09-01), None
patent: A 2004-6326 (2004-01-01), None
patent: A 2004-200072 (2004-07-01), None

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