公开(公告)号：US12222534B1

公开(公告)日：2025-02-11

申请号：US18650132

申请日：2024-04-30

Applicant: LMS Co., Ltd.

Inventor： Byeonghun Lee ,  Hyeonuk Park ,  Dongkyu Lee ,  Changgoo Park

IPC: F21V8/00

Abstract: Provided is an optical film comprising a first base portion; a pyramid pattern layer including a plurality of pyramid patterns formed on a first surface of the first base portion and a first side of a base of the pyramid pattern arranged in a pyramid direction; and a first prism pattern layer including a plurality of first prism patterns formed on a second surface of the first base portion and an edge of the first prism pattern arranged in a prism direction.

公开(公告)号：US11550185B2

公开(公告)日：2023-01-10

申请号：US17509133

申请日：2021-10-25

Applicant: LMS Co., Ltd.

Inventor： Jinhwan Kim ,  Sungsik Cho ,  Woojong Lee ,  Changgoo Park

IPC: G02F1/1335 ,  F21V8/00

Abstract: A backlight unit according to various embodiments of the disclosure may include a light source, a light guide plate configured to guide light emitted from the light source and disposed to face in a first direction, and an optical film disposed over the light guide plate. The optical film may include a first prism sheet including first prism structures arranged side by side to each other along a second direction perpendicular to the first direction, and a second prism sheet disposed over the first prism sheet and including second prism structures arranged side by side to each other along a third direction forming an acute angle with the second direction.