公开(公告)号：US20010001509A1

公开(公告)日：2001-05-24

申请号：US09757875

申请日：2001-01-10

Applicant: U.S. Philips Corporation

Inventor： Dirk J. Broer ,  Johannes A.M.M. Van Haaren

IPC: C08F002/46 ,  C08F002/48 ,  G01B011/00 ,  G02B005/30

CPC classification number: G02B5/3016

Abstract: The Application describes a method and devices for manufacturing a broadband cholesteric polarizer having a well-defined bandwidth and edge position. To this end, a liquid-crystalline cholesterically ordered layer comprising reactive chiral monomers and reactive nematogenic monomers having a different reactivity is polymerized by exposure to radiation. The invention is characterized in that the intensity of the radiation is increased substantially, preferably by a factor of 10 or more, when a desired edge position of the band is reached. As a result, the bandwidth and edge position of the reflection band reached at that moment are frozen as it were. A monochromatic sensor can be used to determine whether said edge position has been reached, the wavelength used by the sensor corresponding to the wavelength of the desired edge position of the band. Broadband, cholesteric polarizers having a well-defined bandwidth and edge position can very advantageously be used in a display.

Abstract translation: 本申请描述了用于制造具有明确的带宽和边缘位置的宽带胆甾型偏振器的方法和装置。 为此，包含反应性手性单体和具有不同反应性的反应性起丝单体的液晶胆甾醇排序层通过暴露于辐射而聚合。 本发明的特征在于当达到期望的边缘位置时，辐射的强度基本上增加，优选地增加10倍或更多倍。 结果，此时达到的反射带的带宽和边缘位置被冻结。 可以使用单色传感器来确定所述边缘位置是否已经达到，传感器使用的波长对应于所述带的期望边缘位置的波长。 具有良好定义的带宽和边缘位置的宽带胆甾型偏振器可以非常有利地用于显示器中。