Presenting virtual objects based on head movements in augmented or virtual reality systems
One embodiment is directed to a user display device comprising a housing frame mountable on the head of the user, a lens mountable on the housing frame and a projection sub system coupled to the housing frame to determine a location of appearance of a display object in a field of view of the user based at least in part on at least one of a detection of a head movement of the user and a prediction of a head movement of the user, and to project the display object to the user based on the determined location of appearance of the display object.
1. A method of operation in an augmented reality image system, the method comprising:
detecting a head movement of an end user;
determining respective resolutions for each of at least two portions of an augmented reality image frame in response to the detected head movement of the end user;
adjusting a second slope of a second drive signal corresponding to a second lower resolution portion of the augmented reality image frame between a time of presenting a first higher resolution portion of the augmented reality image frame and presenting the second lower resolution portion of the augmented reality image frame to modify a second resolution of the second lower resolution portion of the augmented reality image frame such that it is lower than a first resolution of the first higher resolution portion of the augmented reality image frame, wherein the second slope of the second drive signal corresponding to the second lower resolution portion of the augmented reality image frame is different from a first slope of a first drive signal corresponding to the first higher resolution portion of the augmented reality image frame;
displaying a virtual object to the end user based on the first and second resolutions of the first higher resolution portion and the second lower resolution portion of the augmented reality image frame;
rendering the first higher resolution portion of the augmented reality image frame adjacent a center of the spiral scan pattern using a spiral scan pattern; and
rendering the second lower resolution portion of the augmented reality image frame using the spiral scan pattern, such that the second lower resolution portion surrounds the first higher resolution portion.
2. The method of claim 1 , wherein each portion of the augmented reality image frame is at least one of a field of the augmented reality image frame, a line of the augmented reality image frame, and a pixel of the augmented reality image frame.
3. The method of claim 1 , wherein modifying the second resolution of the second lower resolution portion of the augmented reality image frame further comprises adjusting an amplitude of the first drive signal.
4. The method of claim 1 , further comprising:
assessing a point of attention in at least a first augmented reality image for the end user, based on at least one of a processed eye tracking data, a determined location of appearance of a virtual object in a field of view of the end user relative to an end user frame of reference, a determined location of appearance of the virtual object when newly introduced in the field of view of the end user, and a determined location of appearance of the virtual object in a new position in an augmented reality image relative to a position of the virtual object in at least one previous augmented reality image.
5. The method of claim 4 , wherein the processing eye tracking data tracking data is indicative of at least one of an orientation of the end user's eyes and an orientation of the end user's head.
6. The method of claim 4 , further comprising:
increasing a resolution in at least one subsequent augmented reality image in a portion of the at least one subsequent augmented reality image that is adjacent to the assessed point of attention.
7. The method of claim 4 , further comprising:
decreasing the resolution in at least one subsequent augmented reality image in a portion of the at least one subsequent augmented reality image that is not adjacent to the assessed point of attention.