US 11,940,635 B2
Light diffusion control body and reflective display body
Baku Katagiri, Tokyo (JP); Kentaro Kusama, Tokyo (JP); and Tatsuki Kuramoto, Tokyo (JP)
Assigned to LINTEC CORPORATION, Tokyo (JP)
Filed by LINTEC CORPORATION, Tokyo (JP)
Filed on Aug. 19, 2020, as Appl. No. 16/997,245.
Claims priority of application No. 2019-150541 (JP), filed on Aug. 20, 2019.
Prior Publication US 2021/0055459 A1, Feb. 25, 2021
Int. Cl. G02B 5/02 (2006.01)
CPC G02B 5/0236 (2013.01) [G02B 5/0284 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A light diffusion control body comprising
at least two light diffusion control layers each having a regular internal structure, the regular internal structure comprising a plurality of regions having a relatively high refractive index in a region having a relatively low refractive index,
the at least two light diffusion control layers are laminated to each other,
the at least two light diffusion control layers including a first light diffusion control layer and a second light diffusion control layer each having a minimum value of a haze value of 35% or more, the haze value being measured when one surface of each of the first light diffusion control layer and the second light diffusion control layer is irradiated sequentially with a light ray at an incident angle of −70° to 70° with respect to a normal direction of the surface being 0°,
a difference between a haze value of the first light diffusion control layer and a haze value of the second light diffusion control layer is 5 points or less, the haze value in the difference being measured when each light diffusion control layer is irradiated with light rays at an incident angle of 0°.