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US 12,596,216 B2Granted
Optical film
Assignee3M Innovative Properties Company
InventorsCarl A. Stover, Lin Zhao, Gilles J. Benoit, Robert D. Taylor
Life of this patent
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Assignee3M Innovative Properties Company
InventorsCarl A. Stover, Lin Zhao, Gilles J. Benoit, Robert D. Taylor
Estimating the term…
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.
An optical film comprising a plurality of polymeric layers arranged along at least a portion of a thickness of the optical film and sequentially numbered from 1 to N, N an integer greater than about 100, the plurality of polymeric layers comprising a polymeric end layer at each end thereof, a plot of an average layer thickness versus a layer number of the plurality of polymeric layers comprising a first knee region separating a left region comprising at least N1 sequentially arranged polymeric layers, N1 an integer greater than about 50, where the polymeric layers have lower layer numbers, from a middle region comprising at least N2 sequentially arranged polymeric layers, N2 an integer greater than about 10, where the polymeric layers have higher layer numbers, such that 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 with an r-squared value of greater than about 0.8, 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 with an r-squared value of greater than about 0.8, the optical film further comprising a second knee region separating the middle region from a right region comprising at least N3 sequentially arranged polymeric layers, N3 an integer greater than about 3, where the polymeric layers have higher layer numbers than the polymeric layers in the middle region, such that a linear fit to the at least N3 sequentially arranged polymeric layers in the right region has a positive linear slope, wherein the positive linear slope of the linear fit to the at least N3 sequentially arranged polymeric layers in the right region has a magnitude of greater than about 1.2 nm per layer number, the linear fit to the at least N3 sequentially arranged polymeric layers in the right region having an r-squared value of greater than about 0.6.
An optical film comprising a plurality of polymeric layers comprising a polymeric end layer at each end thereof, the polymeric end layers and each layer therebetween having an average thickness less than about 300 nm, a plot of an average layer thickness versus a layer number of the plurality of polymeric layers comprising:
An optical film comprising a plurality of polymeric layers arranged along at least a portion of a thickness of the optical film and sequentially numbered from 1 to N, N an integer greater than about 100, the plurality of polymeric layers comprising a polymeric end layer at each end thereof, the polymeric end layers and each layer therebetween having an average thickness less than about 300 nm, an mth layer in the plurality of the polymeric layers having an average thickness tm, m<N, such that an average thickness of each polymeric layer in the plurality of polymeric layers having a layer number n, m≤n≤N, is within about 10% of:
An optical film comprising a plurality of polymeric layers arranged along at least a portion of a thickness of the optical film and sequentially numbered from 1 to N, N an integer greater than about 200, the plurality of polymeric layers comprising a polymeric end layer at each end thereof, the polymeric end layers and each layer therebetween having an average thickness less than about 300 nm, a plot of an average layer thickness versus a layer number of the plurality of polymeric layers comprising a knee region separating a left region comprising at least 100 sequentially arranged polymeric layers where the polymeric layers have lower layer numbers, from a right region comprising at least 10 sequentially arranged polymeric layers where the polymeric layers have higher layer numbers, such that a third order polynomial fit to at least 15 sequentially arranged polymeric layers comprising the knee region has a positive third order coefficient and a negative second order coefficient with an r-squared value of greater than about 0.8.
Dependencies are inferred from the claim text.