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公开(公告)号：US20250073082A1
公开(公告)日：2025-03-06
申请号：US18950744
申请日：2024-11-18
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Claire R. Donoghue , Britton G. Billingsley , Kristina M. Magnusson
Abstract: The present disclosure relates to darkening filters 10, 10′ which are suitable for selectively darkening an optically transmissive window 20 for protection from light, in particular from high intensity light. The darkening filter 10, 10′ is mounted in a forward-facing optically transmissive window 20 and comprises a non-uniform pattern 30 of switchable shutters 32 capable of being switching to at least a dark state and a light state by a shutter control system 40. The present disclosure also relates to a method of operating such darkening filters 10, 10′. The present disclosure furthermore relates to vision-protective 10 headgears 100, 100′, welding shields 110 and panes 120 comprising the darkening filters 10, 10′ according to the present disclosure.
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公开(公告)号：US11129748B2
公开(公告)日：2021-09-28
申请号：US16098155
申请日：2017-05-01
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Kristina M. Magnusson , Kenneth Jarefors , Laurent Froissard , Britton G. Billingsley
IPC: A61F9/06
Abstract: A curved eye protection shield for welding protection. The eye protection shield has an electrically switchable darkening filter and a protective cover. The darkening filter has eye facing major inner and outer surfaces, and the protective cover has major inner and outer surfaces. The protective cover is provided for arrangement on the inner surface of the darkening filter. The inner and outer surface of the darkening filter are equidistant, whereas the inner and outer surface of the protective cover are non-equidistant. The invention is advantageous in that it provides an eye protection shield having a minimized refractive power.
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公开(公告)号：US20210055597A1
公开(公告)日：2021-02-25
申请号：US17093377
申请日：2020-11-09
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Kristina M. Magnusson , Louise L. M. Madsen , Larissa Zuravskaja , Kenneth Jarefors
IPC: G02F1/1333 , A61F9/06 , G02C7/10 , G02F1/1335 , G02F1/1337 , G02F1/1339 , G02F1/1341 , G02F1/1343 , G02F1/137
Abstract: Curved, arcuately-bonded liquid-crystal cells that include substrates held together by an edge adhesive cured after the substrates were bent into a congruently curved configuration; methods of making such cells; and, switchable shutters and automatic darkening filters that include such cells.
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公开(公告)号：US20200289324A1
公开(公告)日：2020-09-17
申请号：US16885580
申请日：2020-05-28
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Kristina M. Magnusson , Kenneth Jarefors
IPC: A61F9/06
Abstract: A welding helmet having a filter arrangement is disclosed. The welding helmet is provided with a main filter and at least one auxiliary filter separate from and positioned next to the main filter. The at least one auxiliary filter comprises an electro-optic element adapted to attenuate the transmission of optical radiation incident on the auxiliary filter.
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公开(公告)号：US20200278574A1
公开(公告)日：2020-09-03
申请号：US16646943
申请日：2018-08-27
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Kristina M. Magnusson , Louise L. M. Madsen , Larissa Zuravskaja , Kenneth Jarefors
IPC: G02F1/1333 , G02F1/1339 , G02F1/1343 , G02F1/1337 , G02F1/1335 , G02F1/137 , G02C7/10 , G02F1/1341 , A61F9/06
Abstract: Curved, arcuately-bonded liquid-crystal cells that include substrates held together by an edge adhesive cured after the substrates were bent into a congruently curved configuration; methods of making such cells; and, switchable shutters and automatic darkening filters that include such cells.
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Patent Agency Ranking
公开(公告)号：US20190142640A1
公开(公告)日：2019-05-16
申请号：US16098155
申请日：2017-05-01
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Kristina M. Magnusson , Kenneth Jarefors , Laurent Froissard , Britton G. Billingsley
IPC: A61F9/06
Abstract: A curved eye protection shield for welding protection. The eye protection shield has an electrically switchable darkening filter and a protective cover. The darkening filter has eye facing major inner and outer surfaces, and the protective cover has major inner and outer surfaces. The protective cover is provided for arrangement on the inner surface of the darkening filter. The inner and outer surface of the darkening filter are equidistant, whereas the inner and outer surface of the protective cover are non-equidistant. The invention is advantageous in that it provides an eye protection shield having a minimized refractive power.
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公开(公告)号：US09254226B2
公开(公告)日：2016-02-09
申请号：US14372087
申请日：2013-01-15
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Kristina M. Magnusson , Kenneth Jarefors
IPC: G02F1/00 , A61F9/06 , G02F1/1335 , G02F1/1347 , G02F1/1333 , G02F1/23 , G02F1/139 , G02F1/133
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 color-tunable filter whose spectral transmittance can be varied to optimize the visual appearance of a welding task. The color-tunable filter comprises at least one low twist liquid crystal cell disposed between polarization filters having substantially parallel polarization directions. The user is able to adjust the color of the automatic welding filter in the dark transmission state, independently of the shade, in response to a user selected color 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。
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18.发明授权公开(公告)号：US11413190B2
公开(公告)日：2022-08-16
申请号：US16938372
申请日：2020-07-24
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Kristina M. Magnusson , Kenneth Jarefors , Britton G. Billingsley
Abstract: Protective headgear with a curved switchable shutter and curved front and rear cover plates and including at least two antireflective layers.
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公开(公告)号：US20220249290A1
公开(公告)日：2022-08-11
申请号：US17595277
申请日：2020-05-19
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Claire R. Donoghue , Britton G. Billingsley , Kristina M. Magnusson
Abstract: The present disclosure relates to darkening filters 10, 10′ which are suitable for selectively darkening an optically transmissive window 20 for protection from light, in particular from high intensity light. The darkening filter 10, 10′ is mounted in a forward-facing optically transmissive window 20 and comprises a non-uniform pattern 30 of switchable shutters 32 capable of being switching to at least a dark state and a light state by a shutter control system 40. The present disclosure also relates to a method of operating such darkening filters 10, 10′. The present disclosure furthermore relates to vision-protective headgears 100, 100′, welding shields 110 and panes 120 comprising the darkening filters 10, 10′ according to the present disclosure.
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公开(公告)号：US11324633B2
公开(公告)日：2022-05-10
申请号：US16885580
申请日：2020-05-28
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Kristina M. Magnusson , Kenneth Jarefors
IPC: A61F9/06
Abstract: A welding helmet having a filter arrangement is disclosed. The welding helmet is provided with a main filter and at least one auxiliary filter separate from and positioned next to the main filter. The at least one auxiliary filter comprises an electro-optic element adapted to attenuate the transmission of optical radiation incident on the auxiliary filter.
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