Loading patent…
Assignee3M Innovative Properties Company
InventorsYifan Xu, Adam D. Haag, Lin Zhao, Robert D. Taylor, David J.W. Aastuen, Ryan J. Eismin, Justin M. Foley, Mark B. O'Neill, Matthew C. Dachel, Jacob W. Jaeschke, Kayla A. McGrath, Susan L. Kent
Estimating the term…
A biaxially stretched reflective polarizer includes a plurality of biaxially stretched polymeric layers numbering at least 10 in total where each of the polymeric layers has an average thickness of less than about 500 nm. The reflective polarizer is stretched along orthogonal first and second directions by respective S1 and S2 percentages where S2≥2% and S2/S1≤10, such that for at least one location on the reflective polarizer, a substantially normally incident light at the at least one location, and for a visible wavelength range extending from about 420 nm to about 680 nm, the plurality of polymeric layers has: an average reflectance of greater than about 60% when the incident light is polarized along the first direction; and an average transmittance of greater than about 60% and an average reflectance of less than about 1% when the incident light is polarized along the second direction.
A biaxially stretched reflective polarizer comprising a plurality of biaxially stretched polymeric layers numbering at least 10 in total, each of the biaxially stretched polymeric layers having an average thickness of less than about 500 nm, the biaxially stretched reflective polarizer stretched along in-plane mutually orthogonal first and second directions by respective S1 and S2 percentages, S2≥2%, S2/S1≤10, such that for at least one location on the biaxially stretched reflective polarizer, a substantially normally incident light at the at least one location, and a visible wavelength range extending from about 420 nm to about 680 nm, the plurality of biaxially stretched polymeric layers has:
A curved reflective polarizer comprising a plurality of curved polymeric layers numbering at least 10 in total, each of the curved polymeric layers having an average thickness of less than about 500 nm, the curved reflective polarizer having first and second radii of curvature along mutually orthogonal first and second directions, each of the first and second radii of curvature greater than about 1 mm and less than about 500 mm, such that for at least one location on the curved reflective polarizer, a substantially normally incident light at the at least one location, and a visible wavelength range extending from about 420 nm to about 680 nm, the plurality of curved polymeric layers has:
9-15. (canceled)
A curved reflective polarizer comprising a plurality of curved polymeric layers numbering at least 10 in total, each of the curved polymeric layers having an average thickness of less than about 500 nm, the curved reflective polarizer having first and second radii of curvature along mutually orthogonal first and second directions, each of the first and second radii of curvature greater than about 1 mm and less than about 500 mm, such that for at least one location on the curved reflective polarizer, a substantially normally incident light at the at least one location, a blue wavelength range extending from about 420 nm to about 480 nm, a green wavelength range extending from about 490 nm to about 560 nm, and a red wavelength range extending from about 590 nm to about 670 nm, the plurality of curved polymeric layers has average reflectances R2b, R2g and R2r in the respective blue, green and red wavelength regions when the incident light is polarized along the second direction, 2.2%≥R2b−R2g≥0.1%, 2.5%≥R2b−R2r≥−0.1%.
Dependencies are inferred from the claim text.