Privacy displays
AssigneeRealD Spark, LLC
InventorsMichael G Robinson, Graham J. Woodgate, Jonathan Harrold, Ben Ihas
Life of this patent
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Abstract
A switchable privacy display device comprises a spatial light modulator comprising an in-plane display polariser, an out-of-plane polariser and a polarisation switch arranged between the in-plane display polariser and the out-of-plane polariser. The display achieves high image visibility to an off-axis user in a wide-angle mode and high image security to an off-axis snooper in privacy mode of operation.
Claims49
A polar angle control display device comprising:
- a spatial light modulator arranged to output light;
- an in-plane polariser having an absorption axis in a plane of the in-plane polariser arranged on a side of the spatial light modulator;
- and
- an out-of-plane polariser having an absorption axis in a direction having a component out of a plane of the out-of-plane polariser arranged on the same side of the spatial light modulator as the in-plane polariser.
A polar angle control component for assembly with a display device comprising a spatial light modulator, the polar angle control component comprising an out-of-plane polariser having an absorption axis in a direction having a component out of the plane of the out-of-plane polariser.
Dependencies are inferred from the claim text.