Virtual retinal display with scanner array for generating multiple exit pupils
DCFirst Claim
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1. A retinal display apparatus for producing a scanned image for viewing by a viewer'"'"'s eye in response to an image data signal, comprising:
- a light source for generating light, wherein the light is modulated as a function of the image data signal to define image content;
an optical scanner array having a plurality of light reflecting surfaces, the light reflecting surfaces moving at a substantially common frequency with each of the other light reflecting surfaces of the plurality of light reflecting surfaces, wherein light originating from the light source impinges in parallel upon each one light reflecting surface of the plurality of light reflecting surfaces, and wherein light is redirected by each respective one of the plurality of light reflecting surfaces along a corresponding one of a plurality of optical paths; and
an eyepiece, positioned along the plurality of optical paths between the eye and the scanner array, receiving the redirected light from each one of the plurality of light reflecting surfaces to form a plurality of respective exit pupils through which the image is scanned, wherein there is a one to one correspondence between each one exit pupil of the plurality of exit pupils and a corresponding one optical path of the plurality of optical paths and a corresponding one light reflecting surface of the plurality of light reflecting surfaces, and wherein for an aligned one or more of the plurality of exit pupils which is aligned with an entrance pupil of the viewer'"'"' eye, the image is scanned onto the viewer'"'"'s eye.
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Abstract
A scanned retinal display includes an optical scanning array to generate multiple exit pupils in conjunction with an eyepiece. The multiple exit pupils expand the effective exit pupil. As a user moves their eye the eye moves from one exit pupil to another. A scanning array creates the multiple exit pupils to maintain a clear line of sight for an augmented display. Also, a viewer'"'"'s eye position is tracked. To achieve a larger effective exit pupil and the pin hole effect advantage of a small exit pupil, only one exit pupil of the multiple pupils is active to enter the user'"'"'s eye.
90 Citations
21 Claims
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1. A retinal display apparatus for producing a scanned image for viewing by a viewer'"'"'s eye in response to an image data signal, comprising:
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a light source for generating light, wherein the light is modulated as a function of the image data signal to define image content; an optical scanner array having a plurality of light reflecting surfaces, the light reflecting surfaces moving at a substantially common frequency with each of the other light reflecting surfaces of the plurality of light reflecting surfaces, wherein light originating from the light source impinges in parallel upon each one light reflecting surface of the plurality of light reflecting surfaces, and wherein light is redirected by each respective one of the plurality of light reflecting surfaces along a corresponding one of a plurality of optical paths; and an eyepiece, positioned along the plurality of optical paths between the eye and the scanner array, receiving the redirected light from each one of the plurality of light reflecting surfaces to form a plurality of respective exit pupils through which the image is scanned, wherein there is a one to one correspondence between each one exit pupil of the plurality of exit pupils and a corresponding one optical path of the plurality of optical paths and a corresponding one light reflecting surface of the plurality of light reflecting surfaces, and wherein for an aligned one or more of the plurality of exit pupils which is aligned with an entrance pupil of the viewer'"'"' eye, the image is scanned onto the viewer'"'"'s eye. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A retinal display apparatus for producing a scanned image for viewing by a viewer'"'"'s eye in response to an image data signal, comprising:
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a plurality of light sources for generating respective light beams, wherein each respective light beam is modulated as a function of the image data signal to define image content; an optical scanner array having a plurality of light reflecting surfaces, each of the light reflecting surfaces moving at a respective frequency, wherein the light beam from each respective light source impinges upon a respective one of the plurality of light reflecting surfaces and is redirected along a respective optical path of a plurality of optical paths, wherein each respective light source generates the respective light beam synchronized to the frequency of motion of a corresponding one of the respective light reflecting surfaces; and an eyepiece positioned along the plurality of optical paths between the eye and the scanner array receiving the redirected light respectively from each one of the plurality of light reflecting surfaces to form a plurality of corresponding exit pupils through which the image is scanned, wherein there is a one to one correspondence between each one exit pupil of the plurality of exit pupils and a corresponding one optical path of the plurality of optical paths and a corresponding one light reflecting surface of the plurality of light reflecting surfaces, and wherein for an aligned one or more of the plurality of exit pupils which is aligned with an entrance pupil of the viewer'"'"' eye, the image is scanned onto the viewer'"'"'s eye. - View Dependent Claims (9, 10)
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11. A retinal display apparatus for producing a scanned image for viewing by a viewer'"'"'s eye in response to an image data signal, comprising:
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a light source for generating light, wherein the light is modulated as a function of the image data signal to define image content; an optical scanner array including a plurality of adjacent light reflecting surfaces, the scanner array receiving a common drive signal for moving the respective light reflecting surfaces in phase at a substantially common frequency, wherein a common beam of light originating from the light source impinges in parallel upon the plurality of light reflecting surfaces and is redirected by each respective one of the plurality of light reflecting surfaces along a corresponding one of a plurality of optical paths; and an eyepiece, positioned along the plurality of optical paths between the eye and the scanner array, receiving the redirected light from each one of the plurality of light reflecting surfaces to form a plurality of respective exit pupils through which the image is scanned, wherein there is a one to one correspondence between each one exit pupil of the plurality of exit pupils and a corresponding one optical path of the plurality of optical paths and a corresponding one light reflecting surface of the plurality of light reflecting surfaces, and wherein for an aligned one or more of the plurality of exit pupils which is aligned with an entrance pupil of the viewer'"'"' eye, the image is scanned onto the viewer'"'"'s eye. - View Dependent Claims (12, 13)
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14. A method for generating an exit pupil for a retinal display device, the retinal display device receiving an image data signal and scanning an image derived from the image data signal upon a viewer'"'"'s eye, the method comprising the steps of:
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generating light modulated as a function of the image data signal to define image content; receiving the modulated light at an optical scanner array having a plurality of light reflecting surfaces, the light reflecting surfaces moving at a substantially common frequency, the light impinging in parallel upon each one light reflecting surface of the plurality of light reflecting surfaces, the impinging light being redirected by each respective one of the plurality of light reflecting surfaces along a corresponding one of a plurality of optical paths; receiving the redirected light from each one of the plurality of light reflecting surfaces at an eyepiece; forming with the eyepiece a plurality of exit pupils from the light received, respectively, from the plurality of light reflecting surfaces, wherein each one exit pupil of the plurality of exit pupils is formed from the light received at the eyepiece from a corresponding one light reflecting surface of the plurality of light reflecting surfaces, wherein there is a one to one correspondence between each one exit pupil of the plurality of exit pupils and a corresponding one optical path of the plurality of optical paths and a corresponding one light reflecting surface of the plurality of light reflecting surfaces; and scanning the modulated light onto the viewer'"'"'s eye through any one or more of the plurality of exit pupils which are aligned with an entrance pupil of the viewer'"'"' eye. - View Dependent Claims (15, 16, 17)
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18. A method for generating an exit pupil for a retinal display device, the retinal display device receiving an image data signal corresponding to a desired image, the method comprising the steps of:
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generating light modulated as a function of the image data signal to define image content; receiving the modulated light at an optical scanner array having a plurality of light reflecting surfaces, the light impinging in parallel upon each one light reflecting surface of the plurality of light reflecting surfaces, the impinging light being redirected by each respective one of the plurality of light reflecting surfaces along a corresponding one of a plurality of optical paths; reducing power in the reflected light from one or more of the reflective surfaces; receiving the reflected light from each one of the plurality of light reflecting surfaces which is not reduced in power at an eyepiece; and forming with the eyepiece one or more exit pupils from the light received, respectively, from each one of the plurality of light reflecting surfaces which is not reduced in power at an eyepiece, wherein each one exit pupil of the one or more exit pupils is formed from the light received at the eyepiece from a corresponding one light reflecting surface of the plurality of light reflecting surfaces, wherein there is a one to one correspondence between each one exit pupil of the plurality of exit pupils and a corresponding one optical path of the plurality of optical paths and a corresponding one light reflecting surface of the plurality of light reflecting surfaces; and scanning the image onto the viewer'"'"'s eye through at least one of said one or more exit pupils which is aligned with an entrance pupil of the viewer'"'"' eye. - View Dependent Claims (19, 20)
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21. A method for generating an exit pupil for a retinal display device, the retinal display device receiving an image data signal and scanning an image derived from the image data signal upon a viewer'"'"'s eye, the method comprising the steps of:
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generating light modulated as a function of the image data signal to define image content; receiving the modulated light at an optical scanner array having a plurality of light reflecting surfaces, the light reflecting surfaces moving at a substantially common frequency, the light impinging in parallel upon each one light reflecting surface of the plurality of light reflecting surfaces, the impinging light being redirected by each respective one of the plurality of light reflecting surfaces along a corresponding one of a plurality of optical paths; receiving the redirected light from each one of the plurality of light reflecting surfaces at an eyepiece; forming with the eyepiece a plurality of exit pupils from the light received, respectively, from the plurality of light reflecting surfaces, wherein each one exit pupil of the plurality of exit pupils is formed from the light received at the eyepiece from a corresponding one light reflecting surface of the plurality of light reflecting surfaces, wherein there is a one to one correspondence between each one exit pupil of the plurality of exit pupils and a corresponding one optical path of the plurality of optical paths and a corresponding one light reflecting surface of the plurality of light reflecting surfaces; scanning the modulated light onto the viewer'"'"'s eye through one or more of the plurality of exit pupils aligned with an entrance pupil of the viewer'"'"' eye; tracking eye position of the viewer'"'"'s eye; determining an exit pupil aligned with an entrance pupil of the viewer'"'"'s eye; and reducing light in one or more of the exit pupils other than the determined exit pupil, wherein the determined exit pupil changes over time as the viewer moves the entrance pupil.
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Specification