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PCE
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Search for IPC and CPC classification codes or keywords
CPC Subgroup
G02B 30/31

involving active parallax barriers (involving directional light or back-light sources G02B30/33)

Full Title

Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images (in microscopes G02B21/22) > by providing first and second parallax images to an observer's left and right eyes > of the autostereoscopic type > involving parallax barriers > involving active parallax barriers (involving directional light or back-light sources G02B30/33)