Methods and apparatus for providing uniform projection lighting

Details Methods and apparatus for providing uniform projection lighting Methods and apparatus for providing uniform projection lighting

2007-11-27

2010-10-05

Tso, Laura (Department: 2875)

Illumination

Plural light sources

With modifier

C362S249020, C362S237000, C362S800000

Reexamination Certificate

active

07806558

ABSTRACT:
A projection lighting fixture includes multiple LED packages (e.g., chip-on-board or surface mount LED assemblies including one or more LED junctions) disposed on a common mounting board or substrate. Each LED package is associated with a corresponding collimator. The common mounting board on which the multiple LED package/collimator pairs are disposed includes a reference axis in the plane of the board (e.g., a vertical or horizontal axis of the board). One or more of the LED packages are disposed on the common mounting board such that they are rotated clockwise or counter-clockwise with respect to the reference axis, so that at least two of the LED packages have different rotations. The light projected from the respective collimators associated with the multiple LED packages at least partially overlaps in a target illumination field, and the different rotations of at least two of the LED packages facilitates substantially uniform illumination in the target illumination field.

REFERENCES:
patent: 6367949 (2002-04-01), Pederson
patent: 6367950 (2002-04-01), Yamada et al.
patent: 7070312 (2006-07-01), Tatsukawa
patent: 2003/0072156 (2003-04-01), Pohlert et al.
patent: 2003/0193802 (2003-10-01), Luk
patent: 2004/0184270 (2004-09-01), Halter
patent: 10016381 (2001-10-01), None
patent: 2401928 (2004-11-01), None

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