US 12,111,490 B2
Illumination device and display device
Yuuichi Kanbayashi, Kameyama (JP); Shugo Yagi, Kameyama (JP); Junichi Masuda, Kameyama (JP); and Satoshi Tsubooka, Kameyama (JP)
Assigned to Sharp Display Technology Corporation, Kameyama (JP)
Filed by Sharp Display Technology Corporation, Kameyama (JP)
Filed on Jun. 23, 2023, as Appl. No. 18/213,518.
Claims priority of application No. 2022-102358 (JP), filed on Jun. 27, 2022.
Prior Publication US 2023/0417978 A1, Dec. 28, 2023
Int. Cl. F21V 8/00 (2006.01)
CPC G02B 6/0053 (2013.01) [G02B 6/003 (2013.01); G02B 6/0036 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An illumination device comprising:
a plurality of light sources arranged in a row;
a light guide plate having a plate shape and including a first end face at an outer peripheral end face of the light guide plate and a first main surface included in a pair of main surfaces of the light guide plate, the first end face facing the plurality of light sources and being configured to receive incident light, the first main surface being configured to emit light; and
a plurality of first lenses disposed at the first main surface, arranged along a first direction, and extending along a second direction, the first direction being an arrangement direction of the plurality of light sources, the second direction intersecting the first direction and extending along the first main surface,
wherein the plurality of first lenses are configured such that, when an end portion of the first main surface on a side of the plurality of light sources along the first direction is divided into one first region located on a center side along the first direction and two second regions located on two end sides along the first direction, respectively, the plurality of first lenses uniformly occupies the one first region and the two second regions, and a first occupancy of the plurality of first lenses in the one first region is lower than a second occupancy of the plurality of first lenses in the two second regions.