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    • 9. 发明授权
    • Micro-structured illumination system for providing polarized light
    • 用于提供偏振光的微结构照明系统
    • US07265800B2
    • 2007-09-04
    • US10252931
    • 2002-09-23
    • Hendrik Johannes Boudewijn JagtCees BastiaansenHugo Johan CornelissenDirk Jan Broer
    • Hendrik Johannes Boudewijn JagtCees BastiaansenHugo Johan CornelissenDirk Jan Broer
    • G02F1/1335
    • G02B6/0038G02B6/005G02B6/0056G02F1/13362
    • A multi-layered arrangement according to the invention provide emission of polarized light. At least one of the interfacing surfaces between the layers is provided with a microstructure. In one embodiment, a first layer in the form of a lightguide substrate (401) receives unpolarized light from a lamp (420). A birefringent second layer (402) is provided with a microstructure (410) in the form of parallel grooves. On top of the birefringent layer a third layer (403), i.e. a coating layer, is located. Light is outcoupled by way of selective Total Internal Reflection, TIR, at the micro-structured surface of the birefringent layer, yielding a highly linearly polarized emission at near normal angles. The polarized light may be emitted out through the coating or in an opposite direction through the lightguide, which in an advantageous manner allow any configuration of transmissive (backlight), transflective (backlight) or reflective (frontlight) display arrangement.
    • 根据本发明的多层布置提供偏振光的发射。 层之间的至少一个界面表面设置有微结构。 在一个实施例中,以光导基板(401)形式的第一层接收来自灯(420)的非偏振光。 双折射第二层(402)设置有平行凹槽形式的微结构(410)。 在双折射层的顶部,设有第三层(403),即涂层。 在双折射层的微结构化表面处,通过​​选择性全内反射(TIR)的方式将光输出耦合,在近似的正常角度产生高度线性偏振的发射。 偏振光可以通过涂层或相反的方向通过光导发射出来,这以有利的方式允许透射(背光),半透反射(背光)或反射(前照灯)显示装置的任何构造。