US 12,124,070 B2
Phase plate and fabrication method for color-separated laser backlight in display systems
Jian Xu, Redmond, WA (US); Xingzhou Tu, Redmond, WA (US); Ying Geng, Bellevue, WA (US); and Jacques Gollier, Sammamish, WA (US)
Assigned to Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed by Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed on Mar. 30, 2023, as Appl. No. 18/128,497.
Application 18/128,497 is a division of application No. 17/726,270, filed on Apr. 21, 2022, granted, now 11,644,610.
Claims priority of provisional application 63/305,090, filed on Jan. 31, 2022.
Prior Publication US 2023/0244023 A1, Aug. 3, 2023
Int. Cl. F21V 8/00 (2006.01); G02B 27/01 (2006.01); G02F 1/1335 (2006.01); G03F 7/00 (2006.01); G03H 1/04 (2006.01)
CPC G02B 6/005 (2013.01) [G02B 6/0066 (2013.01); G02B 27/0172 (2013.01); G02F 1/133514 (2013.01); G02F 1/133528 (2013.01); G03F 7/70191 (2013.01); G03F 7/70408 (2013.01); G03H 1/0402 (2013.01); G02B 2027/0112 (2013.01); G02F 2201/52 (2013.01); G03H 2223/13 (2013.01); G03H 2260/12 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A liquid crystal display (LCD) apparatus, comprising:
a red, green, blue (RGB) laser to provide backlight;
a grating light guide to transmit the backlight;
a phase plate comprising a transparent substrate and a photopolymer layer to adjust the backlight via a phase adjustment and focusing;
a thin-film-transistor (TFT) layer on the phase plate, wherein the phase plate is to focus a plurality of red, green, and blue components of the backlight onto respective red, green, and blue subpixels of the thin-film-transistor (TFT) layer; and
a liquid crystal display (LCD) layer on the thin-film-transistor (TFT) layer.