Varifocal head-mounted display including modular air spaced optical assembly
First Claim
1. A head-mounted display (HMD) comprising:
- a display;
an optical assembly comprising a front optical element sharing an optical axis with a back optical element and the display, the back optical element adjacent to the display with an air gap between the front optical element and the back optical element, wherein the optical assembly is configured to change an optical power of at least one of the front optical element and the back optical element;
an eye tracker comprising an illumination source located in the air gap, the eye tracker configured to;
obtain information about the optical power,output light generated by the illumination source, anddetermine a position of a user'"'"'s eye relative to the optical axis, based at least in part on a modified version of the output light, the output light being modified by the optical power prior to reflection from the user'"'"'s eye; and
a varifocal module configured to adjust focus of one or more images displayed on the display by adjusting a focal distance of the optical assembly, based on at least one of the determined position of the user'"'"'s eye and the optical power.
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Accused Products
Abstract
A head-mounted display (HMD) includes an electronic display configured to emit image light, an optical assembly that provides optical correction to the image light, an eye tracking system, and a varifocal module. The optical assembly includes a back optical element configured to receive the image light from the electronic display, and a coupling assembly configured to couple a front optical element to a location within the optical assembly such that the front optical element receives light transmitted by the back optical element. The optical correction is determined in part by an optical characteristic of the front optical element that is replaceable. The eye tracking system determines eye tracking information for a first eye of a user of the HMD. A varifocal module adjusts focus of images displayed on the electronic display, based on the eye tracking information and the optical correction.
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Citations
23 Claims
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1. A head-mounted display (HMD) comprising:
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a display; an optical assembly comprising a front optical element sharing an optical axis with a back optical element and the display, the back optical element adjacent to the display with an air gap between the front optical element and the back optical element, wherein the optical assembly is configured to change an optical power of at least one of the front optical element and the back optical element; an eye tracker comprising an illumination source located in the air gap, the eye tracker configured to; obtain information about the optical power, output light generated by the illumination source, and determine a position of a user'"'"'s eye relative to the optical axis, based at least in part on a modified version of the output light, the output light being modified by the optical power prior to reflection from the user'"'"'s eye; and a varifocal module configured to adjust focus of one or more images displayed on the display by adjusting a focal distance of the optical assembly, based on at least one of the determined position of the user'"'"'s eye and the optical power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A head-mounted display (HMD) comprising:
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a display configured to emit image light; an optical assembly that provides optical correction to the image light, the optical assembly comprising; a back optical element configured to receive the image light from the display, the back optical element sharing an optical axis with a front optical element and the display, and a coupling assembly, the coupling assembly configured to couple the front optical element to a location within the optical assembly such that the front optical element receives light transmitted by the back optical element, and that there is an air gap between the location and the back optical element, wherein the optical correction is determined in part by an optical power of the optical assembly; an eye tracking system comprising an illumination source located in the air gap, the eye tracking system configured to; obtain information about the optical power, output light generated by the illumination source, and determine eye tracking information for one or both eyes of a user of the HMD, based at least in part on a modified version of the output light, the output light being modified by the optical power prior to reflection from the user'"'"'s eye; and a varifocal module configured to adjust focus of one or more images displayed on the display by adjusting a focal distance of the optical assembly, based on at least one of the eye tracking information and the optical power. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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Specification