US 12,422,705 B2
Display apparatus having a viewing angle control unit
Jae Hong Song, Paju-si (KR); Kyu Hyun Seo, Paju-si (KR); and Sung Gu Kang, Paju-si (KR)
Assigned to LG Display Co., Ltd., Seoul (KR)
Filed by LG Display Co., Ltd., Seoul (KR)
Filed on Nov. 28, 2023, as Appl. No. 18/521,586.
Claims priority of application No. 10-2023-0013432 (KR), filed on Feb. 1, 2023.
Prior Publication US 2024/0255787 A1, Aug. 1, 2024
Int. Cl. G02F 1/13 (2006.01); G02F 1/13357 (2006.01); G02F 1/1343 (2006.01)
CPC G02F 1/1323 (2013.01) [G02F 1/13362 (2013.01); G02F 1/134309 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A display apparatus comprising:
a back-light unit;
a viewing angle control unit on the back-light unit, the viewing angle control unit including a first lower electrode, a first control liquid crystal layer on the first lower electrode that includes a plurality of first liquid crystal particles, and a first upper electrode on the first control liquid crystal layer; and
a liquid crystal panel configured to display an image, the liquid crystal panel on the first upper electrode of the viewing angle control unit and including a display liquid crystal layer,
wherein the back-light unit, the viewing angle control unit, and the liquid crystal panel include a region overlapping with a first display area that displays a first image and a region overlapping with a second display area that displays a second image while the first image is displayed, which are disposed side by side,
wherein the first lower electrode and the first upper electrode overlap the second display area without overlapping the first display area,
wherein the viewing angle control unit is configured to switch between a wide viewing angle mode during which the second image is displayed with a same viewing angle as the first image and a narrow viewing angle mode during which the second image is displayed with a viewing angle that is less than a viewing angle of the first image according to a voltage applied to the first lower electrode and the first upper electrode, and
wherein in the narrow viewing angle mode, each of the plurality of first liquid crystal particles of the first control liquid crystal layer is obliquely arranged with respect to the first lower electrode and the first upper electrode.