Samsung also made a similar patent;
From “Lets go digital”
Samsung Electronics has filed a patent with WIPO for a VR headset with a flexible display and a curved surface. The field of view will be increased significantly by the new design, to create the same viewing angle as human.
The human viewing angle is about 200 degrees or more. While current VR headsets with a flat display have a FOV of maximum 110˚. For example, the Gear VR with controller has a viewing angle of 101˚. This is also one of the reasons why some people suffer from motion sickness (nausea or dizziness) when experiencing virtual reality.
The patented technology can be used for stand alone, tethered and mobile VR headsets. Samsung may use a cylindrical or spherical display type. In addition, one of the drawings included show a HMD with a foldable smartphone, which also enables a larger FOV.
The patent from Samsung can be seen here, in Korean .
But as @geoffvader said it was in the public domain before, I hope we can see more curved headsets than the ones from oculus and samsung, or just make a better/different patent.
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