US 12,429,726 B1
Optical stack with a liquid crystal layer and a micro lens array, electronic display assembly, and related methods
William Dunn, Alpharetta, GA (US)
Assigned to Manufacturing Resources International, Inc., Alpharetta, GA (US)
Filed by Manufacturing Resources International, Inc., Alpharetta, GA (US)
Filed on Sep. 26, 2024, as Appl. No. 18/897,847.
Claims priority of provisional application 63/541,978, filed on Oct. 2, 2023.
Int. Cl. F21V 8/00 (2006.01); G02B 27/01 (2006.01); G02F 1/1335 (2006.01); G03F 7/20 (2006.01)
CPC G02F 1/133526 (2013.01) [G02F 1/133531 (2021.01); G02F 1/133607 (2021.01)] 17 Claims
OG exemplary drawing
 
1. An optical stack comprising:
a first polarizer;
a micro lens array (“MLA”) bonded to a rear surface of the first polarizer;
a liquid crystal layer (“LC layer”);
a second polarizer bonded to a forward surface of the LC layer, wherein the MLA, the LC layer, the first polarizer, and the second polarizer form, at least in part, a sub-stack, where components of the sub-stack, including at least the MLA, the LC layer, the first polarizer, and the second polarizer are directly or indirectly bonded to one another;
a third polarizer located rearward of, and separate from, the sub-stack; and
a prism film located rearward of the third polarizer, where the prism film is separate from the sub-stack.