Systems, devices, and methods for preventing eyebox degradation in a wearable heads-up display
First Claim
1. A wearable heads-up display comprising:
- a support structure that in use is worn on a head of a user;
a scanning laser projector carried by the support structure;
a holographic combiner carried by the support structure, wherein the holographic combiner is positioned within a field of view of an eye of the user when the support structure is worn on the head of the user, and wherein the holographic combiner comprises;
an eyeglass lens;
a holographic optical element carried by the eyeglass lens; and
a material of variable chromism carried by the eyeglass lens, wherein the material of variable chromism is variable between a first level of optical transparency and a second level of optical transparency, the first level of optical transparency greater than the second level of optical transparency.
1 Assignment
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Accused Products
Abstract
Systems, devices, and methods for preventing eyebox degradation in wearable heads-up displays (“WHUDs”) are described. A WHUD may provide an eyebox defined by multiple spatially-separated exit pupils, where the size of the eyebox is influenced by the spacing between the exit pupils. A larger eyebox is achieved with larger spacing between the exit pupils but a larger spacing between exit pupils is susceptible to the formation of gaps or blind spots in the eyebox (eyebox degradation) if bright environmental light causes the user'"'"'s pupil to constrict to a size that is smaller than the spacing between the exit pupils. A material of variable chromism is included in the user'"'"'s field of view to reduce the perceived brightness of environmental light and thereby prevent the user'"'"'s pupil from constricting to a size smaller than the spacing between the exit pupils.
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Citations
8 Claims
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1. A wearable heads-up display comprising:
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a support structure that in use is worn on a head of a user; a scanning laser projector carried by the support structure; a holographic combiner carried by the support structure, wherein the holographic combiner is positioned within a field of view of an eye of the user when the support structure is worn on the head of the user, and wherein the holographic combiner comprises; an eyeglass lens; a holographic optical element carried by the eyeglass lens; and a material of variable chromism carried by the eyeglass lens, wherein the material of variable chromism is variable between a first level of optical transparency and a second level of optical transparency, the first level of optical transparency greater than the second level of optical transparency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification