US RE50,289 E1
Light unit and a LCD liquid crystal display comprising the light unit
Kwang Ho Park, Seoul (KR); Woo Young Chang, Seoul (KR); Chul Hong Kim, Seoul (KR); and Byoung Eon Lee, Seoul (KR)
Assigned to LG INNOTEK CO., LTD., Seoul (KR)
Appl. No. 17/403,382
Filed by LG INNOTEK CO., LTD., Seoul (KR)
PCT Filed Sep. 9, 2011, PCT No. PCT/KR2011/006739
§ 371(c)(1), (2), (4) Date Mar. 7, 2014,
PCT Pub. No. WO2013/035909, PCT Pub. Date Mar. 14, 2013.
Application 17/403,382 is a continuation of application No. 16/440,343, filed on Jun. 13, 2019, granted, now RE48690.
Application 16/440,343 is a reissue of application No. 14/343,721, filed on Sep. 9, 2011, granted, now 9,678,382, issued on Jun. 13, 2017, previously published as PCT/KR2011/006739, filed on Sep. 9, 2011.
Application 17/403,382 is a reissue of application No. 14/343,721, filed on Sep. 9, 2011, granted, now 9,678,382, issued on Jun. 13, 2017.
This patent is subject to a terminal disclaimer.
Int. Cl. G02F 1/1335 (2006.01); F21V 8/00 (2006.01); G02F 1/13357 (2006.01)
CPC G02F 1/133603 (2013.01) [G02B 6/0021 (2013.01); G02B 6/0041 (2013.01); G02B 6/0051 (2013.01); G02B 6/0055 (2013.01)] 19 Claims
OG exemplary drawing
 
[ 20. A light unit, comprising:
a printed circuit board (PCB);
a plurality of LED light sources disposed on the PCB;
a resin layer disposed on the PCB;
a diffusion plate on the resin layer; and
an optical pattern disposed between the diffusion plate and the resin layer, the optical pattern comprising a first pattern on a lower surface of the diffusion plate, a second pattern on a lower surface of the first pattern, and a third pattern on a lower surface of the second pattern,
wherein at least one of the first pattern, the second pattern, and the third pattern is configured to shield light emitted from the LED light sources,
wherein an area of the first pattern is larger than an area of the second pattern,
wherein the first pattern overlaps the second pattern in a vertical direction perpendicular to the lower surface of the diffusion plate,
wherein the optical pattern includes a first region, a second region, and a third region,
wherein the first region is formed of the first pattern, the second pattern, and the third pattern,
wherein the second region is formed of two selected from the first pattern, the second pattern, and the third pattern, and
wherein the third region is formed of one selected from the first pattern, the second pattern, and the third pattern.]