公开(公告)号：US11982822B2

公开(公告)日：2024-05-14

申请号：US17467097

申请日：2021-09-03

Applicant: LG Display Co., Ltd.

Inventor： Youngmin Kim ,  Juseong Park ,  Myung-Soo Park ,  Sewan Oh ,  Hoon Kang ,  Dongyeon Kim

IPC: G02B30/27 ,  G02B26/08 ,  H10K59/12 ,  H10K59/50

CPC classification number: G02B30/27 ,  G02B26/08 ,  H10K59/12 ,  H10K59/50

Abstract: A display device includes a display panel including a plurality of sub-pixel areas, and a light travel-direction changing layer including a plurality of light-transmitting patterns for changing the travel direction of light emitted from the plurality of sub-pixel areas, respectively. In this connection, a central point of a light-emission face of each of the plurality of light-transmitting patterns is defined as a point at which a virtual face corresponding to the light-emission face of each of the plurality of light-transmitting patterns contacts an optimal light-path line connecting a sub-pixel area corresponding to each light-transmitting pattern and a central point of the viewing area to each other. In this way, light from the sub-pixel area may pass through the light-transmitting pattern and may be directed toward the central point of the viewing area. Thus, the display quality in the viewing area may be improved.

公开(公告)号：US10082614B2

公开(公告)日：2018-09-25

申请号：US15379976

申请日：2016-12-15

Applicant: LG Display Co., Ltd. ,  COVESTRO DEUTSCHLAND AG

Inventor： Hyungseok Bang ,  Seungman Ryu ,  Joobong Hyun ,  Yongku Lee ,  Dongyeon Kim ,  Friedrich-Karl Bruder ,  Günther Walze

IPC: F21V8/00 ,  G02F1/13 ,  G02F1/1335

Abstract: The disclosure relates to a viewing angle switchable back light unit wherein a general mode and a privacy mode in a liquid crystal display can be selected. A thin film type back light unit includes a light guide film, a light radiator, a first light source, and a light collimator. The light guide film includes a light entering part at one side, a light guiding part extending from the one side to an opposite side of the one side, and a light radiating part on one plane surface. The light radiator is on the light radiating part. The first light source faces the light entering part. The light collimator is on the light entering part facing the first light source. The light collimator receives an expanding light from the first light source, converts the expanding light into collimated light, and provides the collimated light to the light entering part.