US 11,892,665 B2
Colloidal crystal structure, and light-emitting device and lighting system using same
Ryosuke Shigitani, Osaka (JP); and Shumpei Fujii, Osaka (JP)
Assigned to Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Appl. No. 17/423,877
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Jan. 15, 2020, PCT No. PCT/JP2020/001082
§ 371(c)(1), (2) Date Jul. 18, 2021,
PCT Pub. No. WO2020/153197, PCT Pub. Date Jul. 30, 2020.
Claims priority of application No. 2019-009444 (JP), filed on Jan. 23, 2019.
Prior Publication US 2022/0120948 A1, Apr. 21, 2022
Int. Cl. G02B 5/26 (2006.01); F21V 9/08 (2018.01); G02B 5/24 (2006.01); B82Y 20/00 (2011.01)
CPC G02B 5/26 (2013.01) [F21V 9/08 (2013.01); G02B 5/24 (2013.01); B82Y 20/00 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A colloidal crystal structure comprising:
a colloidal crystal layer comprising a plurality of colloidal particles, and a binder disposed between the plurality of colloidal particles to fix the colloidal particles; and
a refractive index control material that is provided on one surface of the colloidal crystal layer, is transparent, and has a refractive index difference of less than 10% with respect to the binder,
wherein the plurality of colloidal particles forms a three-dimensionally regular array in the binder, and the regular array adopted by the plurality of colloidal particles is a close-packed structure, a face-centered cubic structure or a body-centered cubic structure, and
wherein the colloidal particles are spaced apart from one another, and the binder is interposed between the colloidal particles.