公开(公告)号：US20210033766A1

公开(公告)日：2021-02-04

申请号：US16948968

申请日：2020-10-08

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Adam D. Haag ,  Timothy J. Nevitt ,  Michael F. Weber ,  Robert D. Taylor ,  Carl A. Stover

IPC: G02B5/30

Abstract: Polarizer stacks are described. More particularly, polarizer stacks that include an absorbing polarizer and multiple reflective polarizers, including at least one collimating reflective polarizer are described. Such polarizer stacks are capable of emitted light that is both collimated and color neutral. Backlights incorporating such polarizer stacks are also described.

公开(公告)号：US12299239B2

公开(公告)日：2025-05-13

申请号：US18604764

申请日：2024-03-14

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Bharat R. Acharya ,  Robert D. Taylor ,  Joseph P. Attard ,  Benjamin J. Forsythe ,  David T. Yust ,  Matthew E. Sousa ,  Jason S. Petaja ,  Anthony M. Renstrom ,  William Blake Kolb ,  Matthew S. Cole ,  Matthew S. Stay ,  Matthew R. D. Smith ,  Jeremy O. Swanson ,  Tri D. Pham ,  David A. Rosen ,  Qunyi Chen ,  Lisa A. DeNicola ,  Quinn D. Sanford ,  Carl A. Stover ,  Lin Zhao ,  Gilles J. Benoit

IPC: G06F3/042 ,  F21V8/00 ,  G02B5/02 ,  G02B5/30

Abstract: A display system for sensing a finger of a user applied to the display system includes a display panel; a sensor for sensing the finger; a sensing light source configured to emit a first light having a first wavelength W1; and a reflective polarizer disposed between the display panel and the sensor. For a substantially normally incident light, an optical transmittance of the reflective polarizer versus wavelength for a first polarization state has a band edge such that for a first wavelength range extending from a smaller wavelength L1 to a greater wavelength L2 and including W1, where 30 nm≤L2−L1≤50 nm and L1 is greater than and within about 20 nm of a wavelength L3 corresponding to an optical transmittance of about 50% along the band edge, the optical transmittance has an average of greater than about 75%.

公开(公告)号：US12147122B2

公开(公告)日：2024-11-19

申请号：US18558425

申请日：2022-05-17

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Carl A. Stover ,  Matthew E. Sousa ,  Bharat R. Acharya ,  Benjamin J. Forsythe ,  Robert D. Taylor ,  Quinn D. Sanford

IPC: G02F1/1335 ,  G02F1/1333 ,  G02F1/13357

Abstract: A backlight including a front reflector disposed on a back reflector and defining a cavity therebetween. For a visible wavelength range and for a first incident angle of less than 5 degrees, the front reflector has an average transmittance of less than 20% for the incident light polarized along a first direction, and an average transmittance of between 20% and 85% for the incident light polarized along an orthogonal second direction. For a visible wavelength range and for a second incident angle of greater than 40 degrees, the front reflector has an average transmittance of less than 40% for each of the first and second directions. For at least a first wavelength in an infrared wavelength range, the front reflector has a transmittance of greater than about 40% for each of the first and second incident angles and for each of the first and second directions. For each of the first and second incident angles, for the incident light polarized along each of the first and second directions, the back reflector has a transmittance of greater than 30% for the first infrared wavelength, and an average transmittance of less than 20% in the visible range.

公开(公告)号：US20230273359A1

公开(公告)日：2023-08-31

申请号：US17996695

申请日：2021-05-03

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Carl A. Stover ,  Lin Zhao ,  Gilles J. Benoit ,  Robert D. Taylor

IPC: G02B5/30

CPC classification number: G02B5/305

Abstract: An optical film includes a plurality of polymeric layers arranged along at least a portion of a thickness of the optical film. Each polymeric layer has an average thickness less than about 300 nm. The plurality of polymeric layers includes a first polymeric layer having a largest average thickness among the plurality of polymeric layers, and a second polymeric layer disposed between a third polymeric layer and the first polymeric layer. The first and second polymeric layers are separated by N1 polymeric layers where 2 ≤N1 ≤ 10. The second and third polymeric layers are separated by N2 polymeric layers where N2 ≥ 10. The first, second and third polymeric layers have respective average thicknesses t1, t2 and t3, where t1 is greater than t2 by at least 10%, and t2 is greater than t3 by at most 2%.

公开(公告)号：US20220003911A1

公开(公告)日：2022-01-06

申请号：US17448540

申请日：2021-09-23

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Adam D. Haag ,  Timothy J. Nevitt ,  Carl A. Stover ,  Andrew J. Ouderkirk ,  Robert D. Taylor ,  Zhaohui Yang

IPC: G02B5/30 ,  G02F1/1335

Abstract: Optical films are disclosed that include a plurality of interference layers. Each interference layer reflects or transmits light primarily by optical interference. The total number of the interference layers is less than about 1000. For a substantially normally incident light in a predetermined wavelength range, the plurality of interference layers has an average optical transmittance greater than about 85% for a first polarization state, an average optical reflectance greater than about 80% for an orthogonal second polarization state, and an average optical transmittance less than about 0.2% for the second polarization state.

公开(公告)号：US20250035984A1

公开(公告)日：2025-01-30

申请号：US18917254

申请日：2024-10-16

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Carl A. Stover ,  Matthew E. Sousa ,  Bharat R. Acharya ,  Benjamin J. Forsythe ,  Robert D. Taylor ,  Quinn D. Sanford

IPC: G02F1/13357 ,  G02F1/1333 ,  G02F1/1335

Abstract: A backlight including a front reflector disposed on a back reflector and defining a cavity therebetween. For a visible wavelength range and for a first incident angle of less than 5 degrees, the front reflector has an average transmittance of less than 20% for the incident light polarized along a first direction, and an average transmittance of between 20% and 85% for the incident light polarized along an orthogonal second direction. For a visible wavelength range and for a second incident angle of greater than 40 degrees, the front reflector has an average transmittance of less than 40% for each of the first and second directions. For at least a first wavelength in an infrared wavelength range, the front reflector has a transmittance of greater than about 40% for each of the first and second incident angles and for each of the first and second directions. For each of the first and second incident angles, for the incident light polarized along each of the first and second directions, the back reflector has a transmittance of greater than 30% for the first infrared wavelength, and an average transmittance of less than 20% in the visible range.

公开(公告)号：US20240377567A1

公开(公告)日：2024-11-14

申请号：US18777934

申请日：2024-07-19

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Adam D. Haag ,  Timothy J. Nevitt ,  Michael F. Weber ,  Robert D. Taylor ,  Carl A. Stover

IPC: G02B5/30

Abstract: Polarizer stacks are described. More particularly, polarizer stacks that include an absorbing polarizer and multiple reflective polarizers, including at least one collimating reflective polarizer are described. Such polarizer stacks are capable of emitted light that is both collimated and color neutral. Backlights incorporating such polarizer stacks are also described.

公开(公告)号：US11846792B2

公开(公告)日：2023-12-19

申请号：US17448540

申请日：2021-09-23

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Adam D. Haag ,  Timothy J. Nevitt ,  Carl A. Stover ,  Andrew J. Ouderkirk ,  Robert D. Taylor ,  Zhaohui Yang

IPC: G02B5/30 ,  G02F1/1335 ,  G02B5/08 ,  G02B5/18 ,  G02B5/28 ,  G02B27/10 ,  G02B27/28

CPC classification number: G02B5/3041 ,  G02B5/0825 ,  G02B5/1814 ,  G02B5/285 ,  G02B5/305 ,  G02B5/3083 ,  G02B27/10 ,  G02B27/28 ,  G02F1/133536

Abstract: Optical films are disclosed that include a plurality of interference layers. Each interference layer reflects or transmits light primarily by optical interference. The total number of the interference layers is less than about 1000. For a substantially normally incident light in a predetermined wavelength range, the plurality of interference layers has an average optical transmittance greater than about 85% for a first polarization state, an average optical reflectance greater than about 80% for an orthogonal second polarization state, and an average optical transmittance less than about 0.2% for the second polarization state.

公开(公告)号：US20230228918A1

公开(公告)日：2023-07-20

申请号：US17923269

申请日：2021-04-26

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Tri D. Pham ,  David A. Rosen ,  Qunyi Chen ,  Lisa A. DeNicola ,  Quinn D. Sanford ,  Matthew S. Cole ,  Bharat R. Acharya ,  Matthew E. Sousa ,  Robert D. Taylor ,  Benjamin J. Forsythe

IPC: G02B5/02

CPC classification number: G02B5/021 ,  G02B5/0268 ,  G02B5/0284 ,  G02B5/0294

Abstract: An optically diffusive film includes an optical substrate layer with opposing first and second major surfaces; and an optical layer disposed on the second major surface of the optical substrate layer and including a structured major surface having a plurality of spaced apart elongated structures elongated along a same first direction and arranged at a substantially uniform density, each elongated structure including a peak such that, in a plane of a cross-section of the elongated structure that is parallel to the first direction and comprises the peak, the elongated structure has a substantially flat top region; wherein for substantially normally incident light and a visible wavelength range and an infrared wavelength range, the optical substrate layer has an average total transmittance or reflectance of greater than about 60% in the visible wavelength range and an average specular transmittance of greater than about 60% in the infrared wavelength range.

公开(公告)号：US20230204839A1

公开(公告)日：2023-06-29

申请号：US17996540

申请日：2021-05-04

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Carl A. Stover ,  Lin Zhao ,  Gilles J. Benoit ,  Robert D. Taylor

IPC: G02B5/30 ,  B32B27/08

CPC classification number: G02B5/305 ,  B32B27/08 ,  G02F1/13338

Abstract: An optical film includes a plurality of polymeric layers. A plot of an average layer thickness versus a layer number of the polymeric layers includes a knee region separating a left region including at least N1 sequentially arranged polymeric layers where the polymeric layers have lower layer numbers from a middle region including at least N2 sequentially arranged polymeric layers where the polymeric layers have higher layer numbers. N1 is greater than about 50 and N2 is greater than about 10. A linear fit to the at least N1 sequentially arranged polymeric layers in the left region has a positive linear slope having a magnitude of greater than about 0.04 nm per layer number, and a linear fit to the at least N2 sequentially arranged polymeric layers in the middle region has a negative linear slope having a magnitude of greater than about 0.05 nm per layer number.