METHOD AND APPARATUS FOR PROVIDING UNIFORM PROJECTION LIGHTING

摘要

PROBLEM TO BE SOLVED: To provide an LED-based projection lighting fixture to facilitate uniform illumination.SOLUTION: A projection lighting fixture 300 comprises multiple LED packages 301 disposed on a common mounting board or substrate 302. Each package is associated with a corresponding collimator 315. The common mounting board on which the multiple LED package/collimator pairs are disposed includes a reference axis 510 in the plane of the board. The LED packages are disposed on the common mounting board such that they are rotated with respect to the reference axis 510, 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 310, and the different rotations of at least two of the LED packages facilitate substantially uniform illumination in the target illumination field.