US 11,927,479 B2
Smart contact lens with ratiometric light change detection
Chris Van Liempd, Schijndel (NL); Andres Felipe Vasquez Quintero, Antwerp (BE); and Herbert De Smet, Destelbergen (BE)
Assigned to IMEC VZW, Leuven (BE); and STICHTING IMEC NEDERLAND, Eindhoven (NL)
Appl. No. 17/613,529
Filed by IMEC VZW, Leuven (BE); and Stichting IMEC Nederland, AE Eindhoven (NL)
PCT Filed May 19, 2020, PCT No. PCT/EP2020/063919
§ 371(c)(1), (2) Date Nov. 23, 2021,
PCT Pub. No. WO2020/234278, PCT Pub. Date Nov. 26, 2020.
Claims priority of application No. 19176095 (EP), filed on May 23, 2019.
Prior Publication US 2022/0252450 A1, Aug. 11, 2022
Int. Cl. G01J 1/44 (2006.01); G02C 7/04 (2006.01); G02C 7/10 (2006.01); G02F 1/133 (2006.01); G02F 1/137 (2006.01)
CPC G01J 1/44 (2013.01) [G02C 7/04 (2013.01); G02C 7/101 (2013.01); G02F 1/13312 (2021.01); G02F 1/137 (2013.01); G01J 2001/446 (2013.01); G02F 2203/48 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A smart contact lens, comprising:
one or more, preferably concentric, rings of a liquid crystal display, LCD, type, each ring being operable between a state having a lower attenuation of light and a state having a higher attenuation of light;
a circuit for detecting a ratiometric change in an incident light intensity; and
a controller configured to operate the one or more rings based on an intensity of an incident light and to, as a response to the circuit detecting a ratiometric change in the intensity of the incident light from a higher intensity state to a lower intensity state indicating that blinking of an eye is detected, initiate a re-polarization of the one or more rings.