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    • 22. 发明申请
    • COLORFUL DIFFRACTIVE LUMINAIRES PROVIDING WHITE LIGHT ILLUMINATION
    • 提供白光照明的有色差分荧光
    • US20140043847A1
    • 2014-02-13
    • US13572823
    • 2012-08-13
    • Zhaohui YangDavid S. ThompsonVivian W. Jones
    • Zhaohui YangDavid S. ThompsonVivian W. Jones
    • F21V13/02
    • F21S8/03F21S8/04F21W2121/00F21Y2103/10F21Y2103/33F21Y2113/13F21Y2115/10G02B6/0038G02B6/0058G02B6/0068G02B6/0076
    • Extended area lighting devices include a light guide and diffractive surface features on a major surface thereof. The diffractive surface features include diffractive features of different pitches in non-overlapping regions of the major surface tailored to extract guided-mode light of different colors from the light guide in different directions. The diffractive features extract light such that an ordinary user observes substantially different colors in different regions of the light guide, providing a colorful appearance. Notwithstanding this, the diffractive features also extract light such that the lighting device illuminates a reference surface, disposed at an intermediate distance from the light guide, with illumination light that is substantially uniform in color and substantially white. Optical films having diffractive features that can be used to construct such devices and light guides are also disclosed. The concept can also be extended to embodiments in which the uniform color illumination light is not substantially white.
    • 扩展区域照明装置在其主表面上包括光导和衍射表面特征。 衍射表面特征包括在主表面的非重叠区域中的不同间距的衍射特征,其被定制以从不同方向从光导中提取不同颜色的导模模式光。 衍射特征提取光,使得普通用户在光导的不同区域中观察到基本上不同的颜色,从而提供了丰富多彩的外观。 尽管如此,衍射特征还提取光,使得照明装置照亮设置在距离光导的中间距离处的参考表面,其具有基本上均匀的颜色和基本上白色的照明光。 还公开了具有可用于构造这种装置和光导的衍射特征的光学膜。 该概念也可以扩展到其中均匀的彩色照明光基本上不是白色的实施例。