US 12,326,582 B2
Light shielding member
Naoki Sakazume, Chuo-ku Tokyo (JP)
Assigned to SOMAR CORPORATION, Tokyo (JP)
Appl. No. 18/023,579
Filed by SOMAR CORPORATION, Chuo-ku Tokyo (JP)
PCT Filed Aug. 30, 2021, PCT No. PCT/JP2021/031654
§ 371(c)(1), (2) Date Feb. 27, 2023,
PCT Pub. No. WO2022/045319, PCT Pub. Date Mar. 3, 2022.
Claims priority of application No. 2020-146380 (JP), filed on Aug. 31, 2020.
Prior Publication US 2023/0305197 A1, Sep. 28, 2023
Int. Cl. G02B 5/00 (2006.01)
CPC G02B 5/003 (2013.01) 5 Claims
 
1. A light shielding component, comprising: a substrate film; and a light shielding layer formed on at least one surface of the substrate film, wherein
a maximum height Rz measured according to JIS B0601:2001 on an outermost surface forming a surface of the light shielding layer is 1 μm or more and 5 μm or less, and an average length Rsm of contour curve elements is 10 μm or more and 40 μm or less,
an average film thickness of the light shielding layer is 2 μm or more and 20 μm or less,
the light shielding layer contains inorganic particles of 20 vol. % to 50 vol. % relative to 100 vol. % of the light shielding layer as a whole,
the light shielding layer comprises a plurality of inorganic particle groups with different particle sizes, and
the inorganic particle group with the largest particle size among the inorganic particle groups is a silica particle group containing silica particles.