US 11,947,135 B2
High transmission light control film
Daniel J. Schmidt, Woodbury, MN (US); Caleb T. Nelson, Woodbury, MN (US); Kevin W. Gotrik, Hudson, WI (US); Raymond J. Kenney, Woodbury, MN (US); John A. Wheatley, Stillwater, MN (US); Kenneth A. Epstein, St. Paul, MN (US); Gary T. Boyd, Woodbury, MN (US); and Corey D. Balts, Eau Claire, WI (US)
Assigned to 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
Appl. No. 16/768,910
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
PCT Filed Dec. 12, 2018, PCT No. PCT/US2018/065193
§ 371(c)(1), (2) Date Jun. 2, 2020,
PCT Pub. No. WO2019/118589, PCT Pub. Date Jun. 20, 2019.
Claims priority of provisional application 62/777,815, filed on Dec. 11, 2018.
Claims priority of provisional application 62/598,248, filed on Dec. 13, 2017.
Prior Publication US 2020/0341173 A1, Oct. 29, 2020
Int. Cl. G02B 5/00 (2006.01); G02B 5/122 (2006.01); G02B 5/128 (2006.01)
CPC G02B 5/003 (2013.01) [G02B 5/122 (2013.01); G02B 5/128 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A light control film, comprising:
a light input surface and a light output surface opposite the light input surface;
alternating transmissive regions and absorptive regions disposed between the light input surface and the light output surface, wherein the absorptive regions have an aspect ratio of at least 30 and the alternating transmissive regions and absorptive regions have a transmission as measured with a spectrophotometer at a viewing angle of 0 degrees of
i) at least 35% for a wavelength of the range 320-400 nm (UV), or
ii) at least 65% for a wavelength of the range 700-1400 nm (NIR), or a combination thereof,
wherein the maximum surface area that is blocked is less than 20% of the total alternating transmissive regions and absorptive regions, and wherein the absorptive regions comprise polyelectrolytes, wherein the absorptive regions comprise light-absorbing material ionically bonded to the polyelectrolytes.