Systems And Methods For Aligning A Near-Eye Display Device
A near-eye display system includes (a) a near-eye display device, having a display and capable of providing, to a pupil of a user, an image from the display superimposed on an ambient scene, and (b) a fixture for coupling the near-eye display device to a holder mounted to the user, wherein the fixture has a plurality of degrees of freedom for alignment of the display device with respect to the pupil.
1 . A near-eye display system, comprising:
a near-eye display device, including a display and capable of providing, to a pupil of a user, an image from the display superimposed on an ambient scene; and
a fixture for coupling the near-eye display device to a holder mounted to the user, the fixture having a plurality of degrees of freedom for alignment of the display device with respect to the pupil.
2 . The near-eye display system of claim 1 , the display including a liquid-crystal-on-silicon (LCOS) display.
3 . The near-eye display system of claim 1 , the plurality of degrees of freedom including at least one translational degree of freedom.
4 . The near-eye display system of claim 3 , the at least one translational degree of freedom including translation of the near-eye display device, in a direction non-parallel to a viewing axis from the pupil to the image of the display, for moving position of the image of the display to a desired position in a field of view of the pupil.
5 . The near-eye display system of claim 4 , the at least one translational degree of freedom including two translational degrees of freedom.
6 . The near-eye display system of claim 5 , the two translational degrees of freedom being substantially orthogonal to one another.
7 . The near-eye display system of claim 3 , the fixture including a telescoping section for providing one of the at least one translational degree of freedom.
8 . The near-eye display system of claim 1 , the plurality of degrees of freedom including two rotational degrees of freedom for changing keystone distortion of the image of the display.
9 . The near-eye display system of claim 8 , the fixture including two pivot joints for providing the two rotational degrees of freedom.
10 . The near-eye display system of claim 8 , the two rotational degrees of freedom being substantially orthogonal to one another.
11 . The near-eye display system of claim 1 , the plurality of degrees of freedom including two rotational degrees of freedom for positioning the image of the display orthogonally to a viewing axis from the pupil to the image of the display.
12 . The near-eye display system of claim 1 , the plurality of degrees of freedom including two translational degrees of freedom and two rotational degrees of freedom.
13 . The near-eye display system of claim 12 , the two translational degrees of freedom moving position of the image of the display to desired position in field of view of the pupil, the two rotational degrees of freedom changing keystone distortion of the image of the display.
14 . A method for aligning a display image superimposed on an ambient scene viewed by a pupil of a user, comprising:
manipulating a plurality of degrees of freedom of a fixture, coupling a near-eye display device to a holder that mounts on the user, to align the display image with respect to pupil field of view, the near-eye display device including a display and optics for forming, from the display, the display image and superimposing the display image on the ambient scene.
15 . The method of claim 14 , the step of manipulating comprising translating the near-eye display device, relative to holder, to move position of the image of the display to desired position in the field of view of the pupil.
16 . The method of claim 15 , the step of translating including modifying length of a telescoping section of the fixture.
17 . The method of claim 15 , the step of translating including translating the near-eye display device with respect to the holder, in two non-parallel directions.
18 . The method of claim 14 , the step of manipulating comprising rotating the near-eye display device about two substantially orthogonal axes to change keystone effect of the image of the display.
19 . The method of claim 14 , the step of manipulating comprising rotating the near-eye display device about two substantially orthogonal axes to position the image of the display orthogonally to a viewing axis from the pupil to the image of the display.
20 . The method of claim 14 , the step of manipulating comprising:
translating the near-eye display device, relative to the holder, to move position of the image of the display to desired position in the field of view of the pupil; and
rotating the near-eye display device about two substantially orthogonal axes to change keystone effect of the image of the display.
21 . A method for manufacturing a display system that includes functionality for aligning a display image with respect to a pupil of a user, comprising:
producing a fixture for coupling a near-eye display device to a holder for mounting the display device on the user, the near-eye display device including a display and capable of superimposing an image of the display on an ambient scene viewed by the user, the fixture including a plurality of degrees of freedom for moving the near-eye display device relative to the holder.
22 . The method of claim 21 , the step of producing comprising manufacturing the fixture with at least one translational degree of freedom for moving position of the image of the display to desired position in a field of view of the pupil.
23 . The method of claim 22 , the step of manufacturing comprising forming a telescoping section of the fixture.
24 . The method of claim 21 , the step of manufacturing comprising manufacturing the fixture with two translational degrees of freedom for moving position of the image of the display to desired position in field of view of the pupil.
25 . The method of claim 21 , the step of producing comprising manufacturing the fixture with at least two rotational degrees of freedom for changing keystone distortion of the image of the display.
26 . The method of claim 25 , the step of manufacturing comprising incorporating, into the fixture, at least two pivot joints for providing the at least two rotational degrees of freedom, respectively.
27 . The method of claim 27 , the step of incorporating comprising incorporating, into the fixture, the two pivot joints with substantially orthogonal pivots.