Institut Telecom/telecom Bretagne

Emmanuel Daniel

Jean-Louis De Bougrenet De La Tocnaye

Laurent Dupont

Bertrand Caillaud

Robert Bellini

Olivier Castany

An optical shuttering device is provided, which includes an optical cell with a liquid crystal material between first and second transparent substrates and controlled by an electronic switching circuit. The switching circuit includes a power supply module, providing a control voltage, and a switching element mounted in series between the power supply module and the cell, making it possible to switch the cell between an on state and an off state. The electronic switching circuit furthermore includes a current source mounted in series between the power supply module and the switching element. The substrates preferably have different thickness and material.

Optical shuttering device based on liquid crystals with attenuation of switching noises of said liquid crystals, corresponding viewing goggles and display device

Liquid crystal spectacles are provided for three-dimensional viewing of digital video content from a projector. The viewing spectacles include a first rectilinear polariser and a second rectilinear polariser respectively having polarisation axes Pand P, the polarisation axes Pand Pbeing parallel or perpendicular relative to each other. Furthermore, the liquid crystal has an adapted intrinsic tilt angle and is used in a half-wave blade configuration. The liquid crystal further includes first and second separate areas, each respectively located opposite a vision axis. The first area includes a first director and the second area includes a second director. The first and second directors are oriented so as to define an adapted angle between them. This enables a 'non-one-eyed' vision while waiting for the projection of the film to start, and to obtain the best possible contrast between the two eyes of the user when viewing the digital video content.

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Le Relecq Kerhuon, France

Emmanuel Daniel