US 12,292,666 B2
Color-changeable plastic
Dong Eun Cha, Hwaseong-si (KR); Hyun Kyung Kim, Hwaseong-si (KR); Jong Seung Park, Busan (KR); and Jun Hong Choi, Busan (KR)
Assigned to Hyundai Motor Company, Seoul (KR); Kia Corporation, Seoul (KR); and Pusan National University Industry-University Cooperation Foundation, Busan (KR)
Filed by HYUNDAI MOTOR COMPANY, Seoul (KR); KIA CORPORATION, Seoul (KR); and Pusan National University Industry-University Cooperation Foundation, Busan (KR)
Filed on Jun. 8, 2021, as Appl. No. 17/341,922.
Claims priority of application No. 10-2020-0145398 (KR), filed on Nov. 3, 2020.
Prior Publication US 2022/0137473 A1, May 5, 2022
Int. Cl. G02F 1/1516 (2019.01); C08F 12/30 (2006.01); C08K 3/08 (2006.01); C08K 7/06 (2006.01); G02B 1/116 (2015.01); G02F 1/155 (2006.01)
CPC G02F 1/15165 (2019.01) [C08F 12/30 (2013.01); C08K 3/08 (2013.01); C08K 7/06 (2013.01); G02B 1/116 (2013.01); G02F 1/155 (2013.01); C08K 2003/0806 (2013.01); C08K 2201/001 (2013.01); C08K 2201/011 (2013.01); G02F 2201/122 (2013.01); G02F 2202/022 (2013.01); G02F 2202/36 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A color-changeable plastic comprising:
a first conductive electrode layer;
a color change layer disposed on the first conductive electrode layer, configured to cover a top surface of the first conductive electrode layer, and made of a substance that changes color depending on whether a voltage is applied;
a second conductive electrode layer disposed on the color change layer, configured to cover a top surface and side surfaces of the color change layer, and configured to change the color of the color change layer with the first conductive electrode layer when the voltage is applied; and
a conductive guide disposed at at least one of the first conductive electrode layer or the second conductive electrode layer, and configured to guide a movement of electrons and a color change direction of the color change layer when the voltage is applied;
wherein the conductive guide comprises:
an edge portion surrounding edges of the first conductive electrode layer or the second conductive electrode layer; and
a guide pattern portion including a pattern inside the edge portion and configured to guide a color change direction of the color change layer;
wherein the guide pattern portion has first guide lines straightly crossing the inside of the edge portion and second guide lines straightly crossing the inside of the edge portion perpendicularly to the first guide lines, thereby forming a lattice pattern; and
wherein a plurality of first guide lines is spaced apart from each other and gradually increased in length and the second guide lines extend to connect the first guide lines, respectively, whereby the guide pattern is formed in a shape in which the lattice pattern gradually increases.