公开(公告)号：US20150001378A1

公开(公告)日：2015-01-01

申请号：US14372087

申请日：2013-01-15

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Kristina M. Magnusson ,  Kenneth Jarefors

IPC: A61F9/06 ,  G02F1/133 ,  G02F1/23 ,  G02F1/1333 ,  G02F1/1335 ,  G02F1/1347

CPC classification number: A61F9/067 ,  A61F9/065 ,  G02F1/13318 ,  G02F1/13338 ,  G02F1/133512 ,  G02F1/133528 ,  G02F1/1347 ,  G02F1/23 ,  G02F2001/133531 ,  G02F2001/1398 ,  G02F2203/055

Abstract: The present invention relates to an automatic welding filter that changes from a light transmission state to a dark transmission state in response to incident welding light and includes a colour-tunable filter whose spectral transmittance can be varied to optimise the visual appearance of a welding task. The colour-tunable filter comprises at least one low twist liquid crystal cell disposed between polarisation filters having substantially parallel polarisation directions. The user is able to adjust the colour of the automatic welding filter in the dark transmission state, independently of the shade, in response to a user selected colour signal which alters the birefringence properties of the low twist liquid crystal cell.

Abstract translation: 本发明涉及一种自动焊接过滤器，其根据入射的焊接光从透光状态变为暗透射状态，并且包括可以改变光谱透射率以优化焊接任务的视觉外观的颜色可调谐滤光器。 颜色可调谐滤光器包括设置在具有基本上平行的偏振方向的偏振滤光器之间的至少一个低扭曲液晶单元。 响应于改变低扭曲液晶单元的双折射性质的用户选择的颜色信号，用户能够独立于阴影而在暗透射状态下调节自动焊接过滤器的颜色。