US 12,189,212 B2
Eyewear comprising a variable optical filter system and methods for the system and eyewear
Daniel Spiegel, Singapore (SG)
Assigned to Essilor International, Charenton-le-Pont (FR)
Appl. No. 17/310,304
Filed by ESSILOR INTERNATIONAL, Charenton-le-Pont (FR)
PCT Filed Mar. 5, 2020, PCT No. PCT/EP2020/055812
§ 371(c)(1), (2) Date Jul. 27, 2021,
PCT Pub. No. WO2020/178372, PCT Pub. Date Sep. 10, 2020.
Claims priority of application No. 19305257 (EP), filed on Mar. 6, 2019.
Prior Publication US 2022/0137435 A1, May 5, 2022
Int. Cl. G02C 11/00 (2006.01); G02C 5/00 (2006.01); G02C 7/10 (2006.01)
CPC G02C 11/10 (2013.01) [G02C 5/008 (2013.01); G02C 7/10 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An eyewear, comprising:
a frame having an outer side and an inner side, and comprising a first receptacle and a second receptacle;
a first lens element received in the first receptacle, wherein the first lens element comprises a variable optical filter structure;
a light sensor configured to detect incident light and provide a sensor signal based on the detected incident light; and
an analysis module configured to control an optical state of the variable optical filter structure, the analysis module being operably coupled to the light sensor to receive the sensor signal from the light sensor, and operably coupled to the variable optical filter structure to provide a control signal to the variable optical filter structure,
wherein the analysis module is configured to control the optical state of the variable optical filter structure thereby adjusting a target illuminance ratio which is dependent on the sensor signal, the target illuminance ratio being the ratio between a first illuminance of light transmitted by the first lens element from the outer side to the inner side of the frame and a second illuminance of light transmitted from the outer side to the inner side of the frame at a position of the second receptacle, and
wherein the target illuminance ratio is adjustable in range from 0.0001 to 0.95.