US 12,147,070 B2
Display backlight unit with edgelit light guide having protruding pattern on bottom surface
Seongil Kim, Paju-si (KR); Junghyun Kim, Paju-si (KR); and Youngmin Oh, Paju-si (KR)
Assigned to LG DISPLAY CO., LTD., Seoul (KR)
Filed by LG Display Co., Ltd., Seoul (KR)
Filed on Aug. 14, 2023, as Appl. No. 18/233,648.
Claims priority of application No. 10-2022-0167635 (KR), filed on Dec. 5, 2022.
Prior Publication US 2024/0184032 A1, Jun. 6, 2024
Int. Cl. F21V 8/00 (2006.01)
CPC G02B 6/0036 (2013.01) [G02B 6/0058 (2013.01); G02B 6/0068 (2013.01); G02B 6/0076 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A display device comprising:
a display panel configured to display an image;
a first backlight unit disposed under the display panel, and configured to emit light to the display panel;
a second backlight unit disposed under the first backlight unit, and configured to emit light to the display panel; and
a light path control pattern disposed between the first backlight unit and the second backlight unit, the light path control pattern including a light shielding pattern configured to control the light emitted from the second backlight unit to be emitted towards the display panel with a narrow viewing angle,
wherein the first backlight unit includes:
a first light source package configured to output light;
a second light source package configured to output light, the second light source package facing toward the first light source package; and
a first light guide plate disposed between the first light source package and the second light source package, the first light guide plate including patterns that protrude from a bottom surface of the first light guide plate,
wherein each of the patterns includes at least one inclined surface that faces toward the first light source package or the second light source package.