Patent ID: 8508586

Claim:
Spectacles for three-dimensional viewing of digital video content from a projector, said spectacles comprising: a single cell comprising first and second substrates disposed facing each other in order to form a free space; a liquid crystal placed in said free space and having a half-wave blade configuration; a first rectilinear polariser of polarisation axis P 1 adapted to polarise light coming from said projector and disposed on a first external surface of the first substrate of the cell; and a second rectilinear polariser of polarisation axis P 2 is disposed on a second external surface of the second substrate, said polarisation axes P 1 and P 2 of the first and second polarisers being parallel or perpendicular to each other, wherein the liquid crystal comprises first and second distinct zones each situated opposite a vision axis, right and left respectively, the first zone comprising a first director and the second zone comprising a second director, said first and second directors: being symmetrical and each forming an angle β with respect to a first direction B 1 defined as the bisector of the two polarisation axes P 1 and P 2 of the first and second polarisers respectively, if said two polarisation axes P 1 and P 2 of the first and second polarisers are perpendicular to each other, or being symmetrical and each forming an angle β with respect to a second direction B 2 forming an angle of 45° with respect to a common polarisation axis P of the first and second polarisers, if said two polarisation axes P 1 and P 2 of the first and second polarisers are parallel to each other, or being symmetrical and each forming an angle π/2−β with respect to a third direction B 3 perpendicular to the bisector of the two polarisation axes P 1 and P 2 of the first and second polarisers respectively, if said two polarisation axes P 1 and P 2 of the first and second polarisers are perpendicular to each other, or being symmetrical and each forming an angle π/2−β with respect to a fourth direction B 4 forming an angle of −45° with respect to a common polarisation axis P of the first and second polarisers if said two polarisation axes P 1 and P 2 of the first and second polarisers are parallel to each other.