US 12,332,519 B2
Backlight unit and color filter on array configuration for a liquid crystal display
Shenglin Ye, Santa Clara, CA (US); Xinyu Zhu, San Jose, CA (US); Xiangtong Li, San Jose, CA (US); Yu-Jen Wang, San Jose, CA (US); Yun-Han Lee, Redmond, WA (US); and Linghui Rao, Redmond, 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. 22, 2024, as Appl. No. 18/613,563.
Claims priority of provisional application 63/460,020, filed on Apr. 17, 2023.
Prior Publication US 2024/0345437 A1, Oct. 17, 2024
Int. Cl. G02F 1/13357 (2006.01); G02F 1/1335 (2006.01); G02F 1/1362 (2006.01)
CPC G02F 1/133611 (2013.01) [G02F 1/133607 (2021.01); G02F 1/136222 (2021.01); G02F 1/136286 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A head mounted display comprising:
a liquid crystal display (LCD) panel having a color filter on array (COA) configuration, wherein the LCD panel is configured to generate display light, wherein the COA configuration includes electrodes separately facing black matrix lines that effectively define an emission aperture through color filters of the COA configuration; and
a backlight unit including:
a light source configured to emit illumination light;
at least one prism film layer; and
a light adjustment layer configured to receive the illumination light emitted by the light source and to adjust at least one characteristic of the illumination light to generate adjusted light to provide to the at least one prism film layer, wherein the adjusted light is tuned relative to the at least one prism film layer, and wherein the at least one prism film layer is configured to generate prism-prepared light in response to the adjusted light and to provide the prism-prepared light to the LCD panel for generation of the display light in response to the prism-prepared light, wherein the light adjustment layer is configured to tune the adjusted light for enlarging an emission cone of the display light that exits the emission aperture through the color filters of the COA configuration.