US 12,298,504 B2
Polarization rotator for head-up display
David Kay Lambert, Sterling Heights, MI (US); and Steven Craig Bower, Fayetteville, GA (US)
Assigned to Panasonic Automotive Systems Company of America, Division of Panasonic Corporation of North America, Peachtree City, GA (US)
Filed by Panasonic Automotive Systems Company of America, Division of Panasonic Corporation of North America, Peachtree City, GA (US)
Filed on Jun. 23, 2023, as Appl. No. 18/213,423.
Application 18/213,423 is a continuation of application No. 17/725,362, filed on Apr. 20, 2022, granted, now 11,726,322.
Application 17/725,362 is a continuation of application No. 17/220,879, filed on Apr. 1, 2021, granted, now 11,333,886, issued on May 17, 2022.
Application 17/220,879 is a continuation of application No. 16/445,563, filed on Jun. 19, 2019, granted, now 10,989,917, issued on Apr. 27, 2021.
Claims priority of provisional application 62/687,371, filed on Jun. 20, 2018.
Prior Publication US 2023/0333373 A1, Oct. 19, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 27/01 (2006.01); B60K 35/00 (2006.01); G02B 27/28 (2006.01); G09G 3/36 (2006.01); B60K 35/23 (2024.01)
CPC G02B 27/0101 (2013.01) [B60K 35/00 (2013.01); G02B 27/286 (2013.01); G09G 3/36 (2013.01); B60K 35/23 (2024.01); B60K 2360/31 (2024.01); B60K 2360/33 (2024.01); B60K 2360/334 (2024.01); G09G 2380/10 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A linear polarizer arrangement, comprising:
a plurality of linear polarizers arranged in a stack, a first of the linear polarizers being configured to receive a light field, a last of the linear polarizers being configured to emit the light field, wherein each pair of adjacent said linear polarizers has a respective gap between the pair of adjacent said linear polarizers, each said gap being filled with optically transparent material, and the optically transparent material matches an index of refraction of adjacent said linear polarizers.