Illumination – Light source and modifier – Louvered or grid type modifier
Reexamination Certificate
2007-04-10
2007-04-10
O'Shea, Sandra (Department: 2875)
Illumination
Light source and modifier
Louvered or grid type modifier
C362S279000, C362S292000, C362S325000, C362S342000, C362S354000
Reexamination Certificate
active
10523155
ABSTRACT:
A luminaire has side reflectors having edges defining the width W of a light-emission window, and a plurality of lamellae, which have a concave outer edge in the light-emission window and an inner face remote from that window. In the centers of the lamellae, the lamellae have a distance hobetween the outer edge and the inner face that is <0.1 W. As a result, the total surface area of the inner face is relatively small. Internal reflections are thereby reduced, and a higher light output is obtained. If the lamellae are solid and made of plastic, less material is required for their fabrication. In a preferred embodiment, ho<0.05 W, and the inner face may then be convex and even have the same contour as the outer edge. The lamellae louver has lamellae of ho<W, in which W is also the length of the lamellae.
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Han Jason Moon
Koninklijke Philips Electronics , N.V.
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