Virtual retinal display with eye tracking
First Claim
1. A method for determining viewing orientation of the viewer'"'"'s eye with a virtual retinal display, the method comprising the steps of:
- generating visible light;
receiving the generated visible light at an input of a lensing system, the lensing system defining an optical path from the input toward an output, the lensing system output adapted for transmitting light to and receiving light from a viewer'"'"'s eye;
receiving, at the lensing system, output light reflected from the viewer'"'"'s eye;
directing a portion of the light reflected from the viewer'"'"'s eye toward an optical detector;
generating an electrical signal corresponding to the directed portion of light; and
analyzing the electrical signal over time to identify select characteristics of the viewer'"'"'s eye, the select characteristics being indicative of the viewing orientation.
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Accused Products
Abstract
Light emitted from a virtual retinal display light source passes through a beamsplitter to a scanning subsystem and on to an eyepiece and the viewer'"'"'s eye. Some of the light is reflected from the viewer'"'"'s eye passing back along the same path. Such light however is deflected at the beamsplitter toward a photodetector. The reflected light is detected and correlated to the display scanner'"'"'s position. The content of the reflected light and the scanner position for such sample is used to generate a map of the viewer'"'"'s retina. Such map includes `landmarks` such as the viewer'"'"'s optic nerve, fovea, and blood vessels. The map of the viewer'"'"'s retina is stored and used for purposes of viewer identification. The viewer'"'"'s fovea position is monitored to track where the viewer is looking.
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Citations
29 Claims
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1. A method for determining viewing orientation of the viewer'"'"'s eye with a virtual retinal display, the method comprising the steps of:
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generating visible light; receiving the generated visible light at an input of a lensing system, the lensing system defining an optical path from the input toward an output, the lensing system output adapted for transmitting light to and receiving light from a viewer'"'"'s eye; receiving, at the lensing system, output light reflected from the viewer'"'"'s eye; directing a portion of the light reflected from the viewer'"'"'s eye toward an optical detector; generating an electrical signal corresponding to the directed portion of light; and analyzing the electrical signal over time to identify select characteristics of the viewer'"'"'s eye, the select characteristics being indicative of the viewing orientation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for identifying a viewer'"'"'s eye orientation with a virtual retinal display, the method comprising the steps of:
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receiving an image data signal at the display to define image content of an image to be scanned upon a viewer'"'"'s retina; generating light modulated as a function of the image data signal; deflecting the light along a raster pattern onto the viewer'"'"'s eye with a light scanner; receiving returning light reflected from the viewer'"'"'s eye at the light scanner, deflecting the returning light; directing at least a portion of the deflected light toward an optical detector; generating a first signal at the optical detector in response to detection of the returning light; and identifying a viewer'"'"'s eye orientation based upon relative location of a select data pattern within the first signal. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method for generating a map of a viewer'"'"'s retina with a virtual retinal display, the method comprising the steps of:
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generating light; receiving the generated light at an input of a lensing system, the lensing system defining a first optical path from the input toward an output, the lensing system output adapted for transmitting light to and receiving light from a viewer'"'"'s eye; receiving light reflected from the viewer'"'"'s eye at a beamsplitter located in the optical path; redirecting with the beamsplitter the reflected light along an alternative optical path; detecting the redirected light with an optical detector positioned in the alternative optical path, the optical detector responsive to the redirected light to produce an electrical signal corresponding to the redirected light; determining viewing orientation of the viewer'"'"'s eye using the electrical signal; generating a virtual image output to the viewer'"'"'s eye through the lensing system; and overlaying a virtual display object within the virtual image responsive to the determined eye orientation.
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16. A method for generating a map of a viewer'"'"'s iris characteristics with a virtual retinal display, the method comprising the steps of:
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receiving an image data signal at the display to define image content of an image to be scanned upon a viewer'"'"'s retina; generating light modulated as a function of the image data signal; deflecting the light along a raster pattern with a light scanner; receiving returning light reflected from the viewer'"'"'s eye at the light scanner, deflecting the returning light toward a beamsplitter; directing said deflected returning light with the beamsplitter toward an optical detector; generating a first signal at the optical detector in response to detection of the returning light; and correlating respective samples of the first signal to corresponding timing positions within the raster pattern, wherein the correlated samples define the map of the viewer'"'"'s iris characteristics. - View Dependent Claims (17, 18, 19)
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20. A method for generating a map of a viewer'"'"'s eye capillary structures with a virtual retinal display, the method comprising the steps of:
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receiving an image data signal at the display to define image content of an image to be scanned upon a viewer'"'"'s retina; generating light modulated as a function of the image data signal; deflecting the light along a raster pattern with a light scanner; receiving returning light reflected from the viewer'"'"'s eye at the light scanner, deflecting the returning light toward a beamsplitter; directing said deflected returning light with the beamsplitter toward an optical detector; generating a first signal at the optical detector in response to detection of the returning light; and correlating respective samples of the first signal to corresponding timing positions within the raster pattern, wherein the correlated samples define the map of the viewer'"'"'s eye capillary structures. - View Dependent Claims (21, 22, 23)
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24. A display apparatus, comprising:
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an image source for generating light; a lensing system having an input aligned to the image source for receiving the generated light, the lensing system having an output adapted for transmitting light to and receiving light from a viewer'"'"'s eye; an optical detector, wherein the lensing system defines a first optical path from the input to the output and a second optical path from output to the optical detector, and wherein the optical detector is responsive to light along the second optical path to produce an electrical signal corresponding to said light along the second optical path; a memory device storing data representing a reference level; and a processor coupled to the detector and to the memory device, the processor being responsive to the electrical signal and the data to produce a signal indicative of a relationship between the electrical signal and the reference level. - View Dependent Claims (25, 26, 27, 28, 29)
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Specification