US 12,078,833 B2
Absorbing, reflecting and collimating polarizer stack and backlights incorporating same
Adam D. Haag, Woodbury, MN (US); Timothy J. Nevitt, Red Wing, MN (US); Michael F. Weber, Shoreview, MN (US); Robert D. Taylor, Stacy, MN (US); and Carl A. Stover, St. Paul, MN (US)
Assigned to 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
Filed on Oct. 8, 2020, as Appl. No. 16/948,968.
Application 16/948,968 is a continuation of application No. 14/769,302, granted, now 10,838,127, previously published as PCT/US2014/015556, filed on Feb. 10, 2014.
Claims priority of provisional application 61/766,933, filed on Feb. 20, 2013.
Prior Publication US 2021/0033766 A1, Feb. 4, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 5/30 (2006.01)
CPC G02B 5/3041 (2013.01) [G02B 5/3083 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A polarizer stack comprising a first absorbing polarizer disposed between first and second reflective polarizers, wherein with increasing wavelength across a visible wavelength band, a block axis transmittance of the first reflective polarizer decreases and a block axis transmittance of the second reflective polarizer increases.