公开(公告)号：US10758420B2

公开(公告)日：2020-09-01

申请号：US16096939

申请日：2017-05-08

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Kristina M. Magnusson ,  Kenneth Jarefors ,  Britton G. Billingsley

IPC: G02B5/28 ,  A61F9/06 ,  G02B5/20 ,  G02B1/11 ,  A61F9/04

Abstract: Protective headgear with a curved switchable shutter and curved front and rear cover plates and including at least two antireflective layers.

公开(公告)号：US10426667B2

公开(公告)日：2019-10-01

申请号：US15543352

申请日：2016-02-01

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Kristina M. Magnusson ,  Kenneth Jarefors

IPC: A61F9/06 ,  G02B26/02 ,  H04N5/235 ,  B23K9/095

Abstract: Automatic darkening filters are often provided on a protective headgear, where protection from high intensity light is desired. An automatic darkening filter includes a switchable shutter, a shutter control system, a light sensor, and an imaging acquisition device. The switchable shutter is capable of assuming at least a dark state, a light state and an intermediate state.

公开(公告)号：US10114242B2

公开(公告)日：2018-10-30

申请号：US15162242

申请日：2016-05-23

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Kristina M. Magnusson ,  Britton G. Billingsley ,  Kenneth Jarefors ,  Larissa Zuravskaja ,  Joy L. Manske

IPC: G02F1/1333 ,  G02F1/1341 ,  G02F1/1335 ,  A41D13/11 ,  G02F1/139 ,  A61F9/02 ,  A61F9/06 ,  G02F1/133 ,  G02F1/1347 ,  G02C7/10 ,  G02F1/1343 ,  B29C65/00 ,  B29C65/48 ,  B32B38/18 ,  B29C65/14 ,  B32B37/15

Abstract: An automatic-darkening filter 10, 10′ that comprises a first polarizer 14, a second polarizer 18, a first liquid-crystal cell 16, and a sensor 64. The first polarizer 14 has a first polarization direction, and the second polarizer 18 has a second polarization direction. The liquid crystal cell 16 is disposed between the first and second polarizers 14, 18 and contains first and second optically-transparent, flexible, glass layers 40 and 42 with the liquid crystal layer 48 being located between these layers. The sensor 64 detects incident light and causes a signal to be sent, which causes molecular rotation within the liquid crystal layer. The inventive automatic-darkening filter is beneficial in that overall product weight can be reduced and the view field can be increased.

公开(公告)号：US20160262467A1

公开(公告)日：2016-09-15

申请号：US15162242

申请日：2016-05-23

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Kristina M. Magnusson ,  Britton G. Billingsley ,  Kenneth Jarefors ,  Larissa Zuravskaja ,  Joy L. Manske

IPC: A41D13/11 ,  G02F1/1333 ,  G02C7/10 ,  G02F1/1343 ,  G02F1/133 ,  G02F1/139 ,  A61F9/02 ,  G02F1/1335

CPC classification number: A41D13/1184 ,  A61F9/023 ,  A61F9/067 ,  B23K9/322 ,  B29C65/1406 ,  B29C65/4845 ,  B29C66/301 ,  B29C66/81264 ,  B29C66/81421 ,  B29C66/81471 ,  B29C66/836 ,  B32B37/153 ,  B32B38/1866 ,  B32B2551/00 ,  G02C7/101 ,  G02F1/13318 ,  G02F1/1333 ,  G02F1/133305 ,  G02F1/133528 ,  G02F1/1341 ,  G02F1/13439 ,  G02F1/13471 ,  G02F1/1396 ,  G02F2001/1398 ,  G02F2201/56

Abstract: An automatic-darkening filter 10, 10′ that comprises a first polarizer 14, a second polarizer 18, a first liquid-crystal cell 16, and a sensor 64. The first polarizer 14 has a first polarization direction, and the second polarizer 18 has a second polarization direction. The liquid crystal cell 16 is disposed between the first and second polarizers 14, 18 and contains first and second optically-transparent, flexible, glass layers 40 and 42 with the liquid crystal layer 48 being located between these layers. The sensor 64 detects incident light and causes a signal to be sent, which causes molecular rotation within the liquid crystal layer. The inventive automatic-darkening filter is beneficial in that overall product weight can be reduced and the view field can be increased.

Abstract translation: 包括第一偏振器14，第二偏振器18，第一液晶单元16和传感器64的自动变暗滤光器10,10'。第一偏振器14具有第一偏振方向，第二偏振器18具有 第二偏振方向。 液晶单元16设置在第一和第二偏振器14,18之间，并且包含第一和第二光学透明的柔性玻璃层40和42，液晶层48位于这些层之间。 传感器64检测入射光，并且发送信号，这导致液晶层内的分子旋转。 本发明的自动变暗过滤器是有益的，因为可以减少总体产品重量并且可以增加视野。

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。