公开(公告)号：US20170307927A1

公开(公告)日：2017-10-26

申请号：US15523489

申请日：2015-10-22

Applicant: NEXTER SYSTEMS ,  INSTITUT MINES TELECOM - IMT ATLANTIQUE - BRETAGNE - PAYS DE LA LOIRE

Inventor： Laurent DUPONT ,  Suman MANNA

IPC: G02F1/137 ,  G02F1/1343

Abstract: A reflecting cell including at least two substrates each covered by an electrode and facing each other, the substrates delimitating between them a volume which separates them and which is filled with a bistable liquid crystal-type material with a threshold field, for example a cholesteric liquid crystal, both electrodes being intended to be connected to a voltage source. This cell is characterized in that at least one of the electrodes is formed by associating a pattern, which does not entirely cover the surface of the substrate considered, and a conducting layer which covers the surface of the substrate considered, the conductivity of the material of the layer being lower than that of the material of the pattern.

公开(公告)号：US20240295755A1

公开(公告)日：2024-09-05

申请号：US18282119

申请日：2022-03-16

Applicant: INSTITUT MINES TELECOM

Inventor： Jean-Louis DE BOUGRENET DE LA TOCNAYE ,  Laurent DUPONT ,  Emmanuel DANIEL ,  Vincent NOURRIT ,  Christian PERSON

IPC: G02C7/10 ,  G02C7/04

CPC classification number: G02C7/101 ,  G02C7/046

Abstract: A contact lens, e.g., of the scleral type, having user-controllable colour changing. An electro-optical structure including at least one layer of a bistable electro-optical absorbent material, which, under the effect of the application of an electric field, can pass from at least one first stable state to at least one second stable state having different colorimetric absorption properties, and vice versa under the effect of the application of an electric field of opposite polarity. This change in state of the material leading to an alteration to the visible colour of the contact lens. The electro-optical structure extending in an annular region intended to cover the iris at least partially while leaving a central zone clear. An electronic circuit encapsulated in the lens and configured to subject the material to an electric field causing the change in state thereof in response to receiving a corresponding control signal.