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1. (WO2019068090) HEAD-WORN AUGMENTED REALITY DISPLAY
Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

WHAT IS CLAIMED IS:

1. A head-mounted display device, comprising:

a frame having a structure that is configured to be worn by a user;

a combiner that is attached to the frame and includes a curved transparent structure having a reflective surface; and

a microdisplay device attached to the frame and configured to, when the frame is worn by the user, emit image content that crosses in front of the user's face and intersects with the reflective surface of the combiner.

2. The head-mounted display device of claim 1, wherein, when the frame is worn, the microdisplay device is configured to emit image content that crosses a sagittal plane of the user's face before intersecting with the reflective surface of the combiner.

3. The head-mounted display device of claim 1 or 2, further comprising a lens assembly disposed along an optical axis between the microdisplay device and the combiner.

4. The head-mounted display device of claim 3, wherein the lens assembly includes a plurality of field lenses oriented along the optical axis.

5. The head-mounted display device of claim 4, wherein the lens assembly further includes a doublet configured to perform color correction.

6. The head-mounted display device of any preceding claim, wherein at least one field lens of the plurality of field lenses includes a kinoform-type diffractive optical element.

7. The head-mounted display device of any preceding claim, wherein the combiner has a positive wrap angle.

8. The head-mounted display device of claim 7, wherein the combiner includes an outer surface that is opposite the reflective surface and has a convex curvature.

9. The head-mounted display device of any proceeding claim, wherein the frame includes a left arm configured to rest on the user's left ear and a right arm configured to rest on the user's right ear.

10. The head-mounted display device of claim 9, further comprising a housing mounted to the left arm of the frame, the housing including the microdisplay device and the microdisplay device being configured to emit image content for the user's right eye.

11. The head-mounted display device of claim 10, further comprising a fold mirror attached to the frame and configured to reflect image content emitted by the microdisplay device toward the combiner.

12. An augmented reality head-mounted display device, comprising:

a frame having a structure that is configured to be worn by a user;

a combiner that is attached to the frame and has an inner surface and an outer surface, the inner surface being reflective and the outer surface having a positive wrap angle; and a microdisplay device attached to the frame and configured to, when the frame is worn by the user, emit image content that intersects with the inner surface of the combiner.

13. The augmented reality head-mounted display device of claim 12, wherein, when the frame is worn, the outer surface of the combiner faces away from the user and has a convex curvature.

14. The augmented reality head-mounted display device of claim 13, wherein the curvature of the outer surface of the combiner is smooth.

15. The augmented reality head-mounted display device of claim 14, wherein the curvature of the outer surface being smooth includes the curvature of the outer surface having a continuous first derivative.

16. The augmented reality head-mounted display device of any of claims 12 to 15, wherein, when the frame is worn by the user, the microdisplay device is configured to emit image content that crosses in front of the user's face and intersects with the inner surface of the combiner.

17. The head-mounted display device of claim 16, wherein, when the frame is worn, the microdisplay device is configured to emit image content that crosses a sagittal plane of the user's face before intersecting with the inner surface of the combiner.

18. A head-mounted display device, comprising:

a frame having a structure that is configured to be worn by a user, the frame including a left arm configured to rest on the user's left ear and a right arm configured to rest on the user's right ear;

a combiner that is attached to the frame and includes a curved transparent structure that has an inner surface and an outer surface, the inner surface being reflective;

a left microdisplay device attached to the frame and configured to emit image content for the user's right eye, the left microdisplay device emitting image content so that the image content crosses in front of the user's face and intersects with the inner surface of the combiner; and

a right microdisplay device attached to the frame and configured to emit image content for the user's left eye, the right microdisplay device emitting image content so that the image content crosses in front of the user's face and intersects with the inner surface of the combiner.

19. The head-mounted display device of claim 18, wherein the combiner has a positive wrap angle.

20. The head-mounted display device of claim 18 or 19, wherein the combiner is attached to the frame via an attachment assembly that, when worn by the user, extends out in front of the user's face.