用于提供均匀投影照明的方法和设备

Methods and apparatus for providing uniform projection lighting

Abstract

一种投影照明装置(300)包括设置在公共安装板或者衬底(302)上的多个LED封装(301)(例如包括一个或者多个LED结的板上芯片或者表面安装LED组件)。每个LED封装和相应的准直仪(315)有关。在其上设置有多个LED封装/准直仪对的公共安装板包括在板平面中的参考轴(510)(例如,板的垂直或者水平轴)。一个或者多个LED封装设置在公共安装板上,使得它们相对于参考轴(510)顺时针或者逆时针旋转,从而至少两个LED封装具有不同的旋转。从和多个LED封装有关的各个准直仪投射的光在目标光照场(310)中至少部分地重叠,并且至少两个LED封装的不同旋转促进目标光照场中大致均匀的照明。
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.

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