US 12,189,164 B2
Backlight unit and display device
Myungjoon Park, Paju-si (KR); and Suhun Lee, Paju-si (KR)
Assigned to LG Display Co., Ltd., Seoul (KR)
Filed by LG Display Co., Ltd., Seoul (KR)
Filed on Jul. 28, 2023, as Appl. No. 18/361,735.
Claims priority of application No. 10-2022-0143678 (KR), filed on Nov. 1, 2022.
Prior Publication US 2024/0142692 A1, May 2, 2024
Int. Cl. F21V 8/00 (2006.01); G02F 1/1335 (2006.01); G02F 1/13357 (2006.01)
CPC G02B 6/0021 (2013.01) [G02B 6/0023 (2013.01); G02B 6/0031 (2013.01); G02B 6/0043 (2013.01); G02B 6/0046 (2013.01); G02B 6/0055 (2013.01); G02B 6/0061 (2013.01); G02B 6/0068 (2013.01); G02B 6/0076 (2013.01); G02F 1/133524 (2013.01); G02F 1/133605 (2013.01); G02F 1/133606 (2013.01); G02B 6/0075 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A display device, comprising:
a display panel; and
a backlight unit, the backlight unit including:
a substrate;
a light emitting structure over the substrate;
a first light reflective structure over the light emitting structure;
a second light reflective structure over the substrate and extending laterally with respect to the light emitting structure; and
a light guide structure over a first region of the second light reflective structure and extending laterally with respect to the light emitting structure, a second region of the second light reflective structure adjacent to the first region being exposed from the light guide structure,
wherein the second light reflective structure includes a plurality of light reflective layers, the plurality of light reflective layers including a first light reflective layer and one or more second light reflective layers each stacked on the first light reflective layer, each second light reflective layer of the one or more second light reflective layers having a smaller area than the first light reflective layer,
wherein a reflectance value of a second light reflective layer of the one or more second light reflective layers decreases from a central portion to an edge portion of the second light reflective layer.