US 11,054,654 B1
Near-eye display device
Chih-Wei Shih, Hsin-Chu (TW); and Chuan-Te Cheng, Hsin-Chu (TW)
Assigned to Coretronic Corporation, Hsin-Chu (TW)
Filed by Coretronic Corporation, Hsin-Chu (TW)
Filed on Mar. 3, 2020, as Appl. No. 16/807,183.
Int. Cl. G02B 27/01 (2006.01); G02B 27/14 (2006.01); F21V 8/00 (2006.01)
CPC G02B 27/0172 (2013.01) [G02B 6/0028 (2013.01); G02B 27/145 (2013.01); G02B 2027/0125 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A near-eye display device comprising:
an image system configured to provide an image beam; and
a first waveguide member disposed on a transmission path of the image beam and comprising:
a first surface adapted to face an eye of a user;
a second surface disposed opposite to the first surface;
a first light incident end located on an end of the first waveguide member, wherein the image beam enters the first waveguide member through the first light incident end; and
a plurality of first light-splitting surfaces configured to dispose in a tilted manner relative to the first surface and the second surface and arrange from a side close to the first light incident end to a side far from the first light incident end, wherein the plurality of first light-splitting surfaces reflect the image beam transmitted in the first waveguide member to the eye, and wherein a plurality of first gaps between some of the plurality of first light-splitting surfaces increase as located farther from the first light incident end, and the plurality of first gaps refer to gaps in a direction parallel to the first surface,
wherein the near-eye display device satisfies L≥W·cot(θ), where L is, taking a visual axis of direct-vision of the eye as a baseline, a second gap between any two adjacent first light-splitting surfaces on a side close to the first light incident end or on the visual axis, the second gap refers to a gap in a direction parallel to the first surface, W is a distance between the first surface and the second surface, θ is a tilted angle of the any two adjacent first light-splitting surfaces relative to the first surface.