公开(公告)号：US11487153B2

公开(公告)日：2022-11-01

申请号：US17001395

申请日：2020-08-24

申请人： Samsung Display Co., Ltd. ,  Seoul National University R&DB Foundation

发明人： Sang Ho Kim ,  Duk Ho Lee ,  Young Chan Kim ,  Ki Seung Bang ,  Chang Won Jang ,  Ji Won Lee ,  Cheon Myeong Lee ,  Byoung Ho Lee

IPC分类号： G02F1/13357 ,  G03H1/32

摘要： A backlight device includes: a light source to emit coherent light; an optical path difference generator on the light source, the optical path difference generator including an incident surface and a plurality of light emitting surfaces, the light emitting surfaces being parallel to the incident surface and having different separation distances from the incident surface; a light condenser on the optical path difference generator; a diffuser on the light condenser; and a collimator on the diffuser.