Determining user accommodation to display an image at a focal plane corresponding to a user's current state of focus

Abstract

Configurations are disclosed for presenting virtual reality and augmented reality experiences to users. The system may comprise an image-generating source to provide one or more frames of image data in a time-sequential manner, a light modulator configured to transmit light associated with the one or more frames of image data, a substrate to direct image information to a user's eye, wherein the substrate houses a plurality of reflectors, a first reflector of the plurality of reflectors to reflect transmitted light associated with a first frame of image data at a first angle to the user's eye, and a second reflector to reflect transmitted light associated with a second frame of the image data at a second angle to the user's eye.

What is claimed is: 
     
         1 . A method of displaying virtual content to a user, the method comprising:
 determining an accommodation of the user's eyes, wherein the determined accommodation is associated with a focal distance corresponding to a user's current state of focus;   projecting light associated with one or more frames of image data;   varying a focus of the projected light based at least in part on the determined accommodation; and   delivering the projected light to the user's eyes, such that the light is perceived by the user as coming from the focal distance corresponding to the user's current state of focus.   
     
     
         2 . The method of  claim 1 , wherein the light is delivered to the user through a substrate guided optics assembly. 
     
     
         3 . The method of  claim 1 , wherein the light is delivered to the user through a freeform optical element. 
     
     
         4 . The method of  claim 1 , wherein the light is delivered to the user through a diffractive optical element (DOE). 
     
     
         5 . The method of  claim 1 , wherein the light is projected through a stack of waveguides, a first of the stack of waveguide configured to output light at a particular wavefront, a second waveguide to output a positive margin wavefront relative to the particular wavefront, a third waveguide to output a negative margin wavefront relative to the particular wavefront. 
     
     
         6 . The method of  claim 1 , further comprising blurring a portion of the one or more frames of image data in a manner such that the portion is out of focus when the projected light is delivered to the user's eyes. 
     
     
         7 . The method of  claim 5 , wherein at least on waveguide of the stack of waveguides is selected based at least in part on the user's state of focus. 
     
     
         8 . The method of  claim 1 , further comprising tracking a convergence of the user's eyes to determine the accommodation of the user's eyes. 
     
     
         9 . The method of  claim 1 , further comprising selecting a depth plane of a plurality of fixed depth planes based at least in part on the determined accommodation. 
     
     
         10 . The method of  claim 1 , further comprising rendering a depth plane based at least in part on the determined accommodation.