Presenting video streams on a head-mountable device

A device comprising:

• one or more processors;
• a non-transitory memory;
• a first display portion;
• a second display portion;
• and
• one or more programs stored in the non-transitory memory, which, when executed by the one or more processors, cause the device to:
• generate a first video stream at a first frame rate for the first display portion, wherein the first frame rate indicates a rate at which frames are presented by the first display portion;
• generate a second video stream at a second frame rate for the second display portion, wherein the second frame rate indicates a rate at which frames are presented by the second display portion, and wherein the second frame rate is approximately equal to the first frame rate;
• and
• temporally shift the second video stream relative to the first video stream so that refresh times of the first display portion are different from refresh times of the second display portion and presentation of frames alternates between the first display portion and the second display portion, wherein an area encompassed by the first display portion does not overlap with an area encompassed by the second display portion.

A non-transitory memory storing one or more programs, which, when executed by one or more processors of a device with a first display portion and a second display portion, cause the device to:

• generate a first video stream at a first frame rate for the first display portion, wherein the first frame rate indicates a rate at which frames are presented by the first display portion;
• generate a second video stream at a second frame rate for the second display portion, wherein the second frame rate indicates a rate at which frames are presented by the second display portion, and wherein the second frame rate is approximately equal to the first frame rate;
• and
• temporally shift the second video stream relative to the first video stream so that refresh times of the first display portion are different from refresh times of the second display portion and presentation of frames alternates between the first display portion and the second display portion, wherein an area encompassed by the first display portion does not overlap with an area encompassed by the second display portion.

A method comprising:

• at a head-mountable device including a first display portion, a second display portion, a non-transitory memory, and one or more processors coupled with the first display portion, the second display portion, and the non-transitory memory:
• generating a first video stream at a first frame rate for the first display portion, wherein the first frame rate indicates a rate at which frames are presented by the first display portion;
• generating a second video stream at a second frame rate for the second display portion, wherein the second frame rate indicates a rate at which frames are presented by the second display portion and wherein the second frame rate is approximately equal to the first frame rate;
• and
• temporally shifting the second video stream relative to the first video stream by a fraction of a frame period of the second frame rate.