US 12,326,646 B2
Varifocal lens
SeongChan Jun, Seoul (KR); Sewon Park, Seoul (KR); YunJi Hwang, Seoul (KR); and Chengyi Li, Seoul (KR)
Assigned to INDUSTRY—ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY, Seoul (KR)
Filed by INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY, Seoul (KR)
Filed on Nov. 23, 2022, as Appl. No. 18/058,545.
Claims priority of application No. 10-2021-0163352 (KR), filed on Nov. 24, 2021.
Prior Publication US 2023/0161218 A1, May 25, 2023
Int. Cl. G02F 1/29 (2006.01)
CPC G02F 1/294 (2021.01) 20 Claims
OG exemplary drawing
 
1. A varifocal lens comprising:
a transparent substrate having a plate shape;
a first lens layer stacked on a first area and formed on a first surface of the transparent substrate;
a second lens layer stacked on a second area which is spaced apart from the first area and formed on the first surface of the transparent substrate; and
a power supply connected to the first lens layer and the second lens layer to apply a first voltage to the first lens layer,
wherein the power supply is configured to adjust the first voltage and change a refractive index of light, which is incident on a second surface of the transparent substrate and transmitted toward the first surface of the transparent substrate, to adjust a focal length,
wherein a magnitude of the first voltage is the same as a potential difference between the first lens layer and the second lens layer, and
wherein the first lens layer and the second lens layer include at least one graphene layer and at least one transition metal dichalcogenide (TMDC) layer which are alternately stacked outward from the first surface of the transparent substrate.