US 12,013,567 B2
Edge-lit light source, backlight module and display devices
Fei Liang, Beijing (CN); Xiuyun Chen, Beijing (CN); Lingyu Sun, Beijing (CN); Jingjun Du, Beijing (CN); Peng Zhong, Beijing (CN); Tingxiu Hou, Beijing (CN); and Jian Zhao, Beijing (CN)
Assigned to BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., Beijing (CN); and BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Filed by BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., Beijing (CN); and BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Filed on May 30, 2023, as Appl. No. 18/325,146.
Application 18/325,146 is a continuation of application No. 17/792,445, granted, now 11,709,309, previously published as PCT/CN2021/104521, filed on Jul. 5, 2021.
Claims priority of application No. 202010811924.5 (CN), filed on Aug. 13, 2020.
Prior Publication US 2023/0296826 A1, Sep. 21, 2023
Int. Cl. F21V 8/00 (2006.01)
CPC G02B 6/0076 (2013.01) [G02B 6/0028 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An edge-lit light source, comprising:
at least two light guide layers arranged in a stack;
side surfaces of each light guide layer including a light incident surface and a light exit surface, and the light guide layer including a bending region located between the light incident surface and the light exit surface; and
one or more light-emitting elements, a light-emitting surface of each light-emitting element facing a light incident surface of at least one light guide layer;
wherein the light guide layer includes:
a first light guide portion and a second light guide portion connected to each other, an end surface of the first light guide portion away from the second light guide portion being the light exit surface,
wherein the second light guide portion includes at least two light guide bars;
each light guide bar includes a bending portion connected to the first light guide portion and an extending portion connected to the bending portion, a surface of the extending portion opposite to an end of the extending portion connected to the bending portion is a light incident sub-surface; and
the light-emitting surface of each light-emitting element faces at least one light incident sub-surface; and
the bending region of the light guide layer includes all of the bending portions of the light guide layer;
wherein second light guide portions of the at least two light guide layers are arranged in sequence in a second direction, and the second direction is perpendicular to a thickness direction of the first light guide portion.