公开(公告)号：US20180180790A1

公开(公告)日：2018-06-28

申请号：US15847613

申请日：2017-12-19

Applicant: LG Display Co., Ltd.

Inventor： JaeJin Kim ,  MinSoo Park

IPC: F21V8/00

CPC classification number: G02B6/0016 ,  G02B6/0036 ,  G02B6/0038 ,  G02B6/0068 ,  G02F1/133615

Abstract: The present disclosure relates to a backlight unit and a display device including the backlight unit. The backlight unit includes a first pattern in a first region of a light guide plate including a light incidence surface and a second pattern in a second region of the light guide plate extending from the first region, so that, in the first region, a directional angle of light can be improved so as to prevent the occurrence of hot spots, and in the second region, a line light source can be converted into a plane light source.

公开(公告)号：US10393937B2

公开(公告)日：2019-08-27

申请号：US15847613

申请日：2017-12-19

Applicant: LG Display Co., Ltd.

Inventor： JaeJin Kim ,  MinSoo Park

IPC: F21V7/04 ,  F21V8/00 ,  G02F1/1335

Abstract: The present disclosure relates to a backlight unit and a display device including the backlight unit. The backlight unit includes a first pattern in a first region of a light guide plate including a light incidence surface and a second pattern in a second region of the light guide plate extending from the first region, so that, in the first region, a directional angle of light can be improved so as to prevent the occurrence of hot spots, and in the second region, a line light source can be converted into a plane light source.

公开(公告)号：US10928660B2

公开(公告)日：2021-02-23

申请号：US15988106

申请日：2018-05-24

Applicant: LG Display Co., Ltd.

Inventor： JinRyun Kim ,  Youngki Song ,  MinSoo Park ,  Eunhee Choi

IPC: G02F1/13 ,  G02F1/35 ,  G02B26/02 ,  G02B5/23 ,  G02F1/13357

Abstract: A viewing angle controlling film, a backlight unit using the same, and a display device using the same are disclosed. The viewing angle controlling film comprises a first area where light transmittance is not converted; and a second area where light transmittance is converted, wherein the second area includes a light-transmittance conversion portion configured to react with light of a predetermined wavelength range to convert the light transmittance and not to react with light of a wavelength range other than the predetermined wavelength range.