Field of view area selection using electrochromic facets
AssigneeGoogle Inc.
InventorsDaniel Adema, Shreyas Potnis
Life of this patent
Estimating the term…
Abstract
To increase the field of view (FOV) area in a head-worn display (HWD), the HWD includes an optical engine (202) configured to emit a display light representing one or more images toward a lightguide (205) of the HWD. Further, the HWD includes an electrochromic reflector having one or more electrochromic facets (322). These electrochromic facets are configured to direct the display light such that the display light propagates through the lightguide along a path of a plurality of paths based on one or more respective states of electrochromic facets. By increasing the number of paths at which the display light propagates through the lightguide, the FOV area is increased.
Claims20
A head-worn display (HWD), comprising:
- an optical engine configured to emit a display light;
- a lightguide;
- and
- an electrochromic facet configured to direct the display light such that the display light propagates through the lightguide along a path of a plurality of paths based on a state of the electrochromic facet.
-9. (canceled)
A lightguide for a head-worn display (HWD), comprising:
- one or more electrochromic facets configured to direct a display light such that the display light propagates through the lightguide along a path of a plurality of paths based on one or more respective states of the one or more electrochromic facets.
The lightguide of 14, wherein the first electrochromic facet is configured to transmit the display light to a second electrochromic facet of the one or more electrochromic facets based on the first electrochromic facet being in a second state.
The lightguide of 16, wherein the second electrochromic facet is configured to direct the display light such that the display light propagates through the lightguide along a third path of the plurality of paths based on the second electrochromic facet being in the second state.
A method, comprising:
- emitting a display light toward a lightguide;
- and
- directing, by an electrochromic facet disposed within the lightguide, the display light such that the display light propagates through the lightguide along a path of a plurality of paths based on a state of the electrochromic facet.
The method of 23, further comprising:
- directing, by the electrochromic facet, the display light such that the display light propagates through the lightguide along a second path of the plurality of paths based on the electrochromic facet being in a second state.
The method of 21, further comprising:
- controlling the state of the electrochromic facet based on a gaze of a user.
Dependencies are inferred from the claim text.