US 12,235,472 B2
Display device having light path controlling member
Se-Jin Lee, Paju-si (KR); Young-Woong Kim, Paju-si (KR); Seung-Soo Yang, Paju-si (KR); and Min-Gyu Choi, Paju-si (KR)
Assigned to LG Display Co., Ltd., Seoul (KR)
Filed by LG DISPLAY CO., LTD., Seoul (KR)
Filed on Sep. 10, 2021, as Appl. No. 17/471,987.
Claims priority of application No. 10-2020-0117159 (KR), filed on Sep. 11, 2020.
Prior Publication US 2022/0082855 A1, Mar. 17, 2022
Int. Cl. G02B 30/32 (2020.01); G06F 1/16 (2006.01)
CPC G02B 30/32 (2020.01) [G06F 1/1609 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A display device, comprising:
a display panel including a plurality of pixel regions and displaying a picture; and
a light path controlling member located on a front surface of the display panel and transmitting the picture output from the display panel,
wherein the light path controlling member includes a plurality of separation walls and a plurality of light path portions between the plurality of separation walls,
wherein a period of the light path portion is different from a period of the pixel region,
wherein the period of the light path portion is non-periodic,
wherein the period of the light path portion is satisfied with conditions 1 and 2,
wherein the condition 1 is POe=(1/k)×Pd, d and the condition 2 is

OG Complex Work Unit Math
where Po is an individual period of the light path portion, Poe is an average period of the light path portion, Pd is the period of the pixel region, and k is a period ratio of the light path portion and the pixel region, wherein 2.6≤k≤3.0.