Patent ID: 11917122
Assignee: nan
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  A | IPC A  H

Claim 1:
2. The system of claim 1 where at least one of the one or more video emitters is a spatially alternating emitter that emits light with characteristics (b) that are controllably alternated between substantially two orthogonal linear angles of polarization, where the spatially alternating emitter further provides a signal to the visual aid indicating the currently emitted linear angle of polarization, and
where the spatio filter of the visual aid is further adapted to alternate between substantially two orthogonal linear angles of polarization filtering, where the visual aid is further adapted to receive the video emitter signal, and where the visual aid alternates the spatio filter between the two substantially orthogonal linear angles based at least in part upon the received emitter signal such that any visual aid comprising the further adapted spatial filter is controllably switched from filtering a first linear angle of polarization to filtering for a second substantially orthogonal linear angle of polarization.