公开(公告)号：US10969590B1

公开(公告)日：2021-04-06

申请号：US16631488

申请日：2019-09-08

Applicant: LUMUS LTD.

Inventor： Yochay Danziger ,  Ronen Chriki ,  Nitzan Livneh

IPC: G09G5/00 ,  G02B27/01 ,  G02B6/42 ,  H04N9/31

Abstract: A near-eye display has a light-guide optical element (LOE) with two major parallel external surfaces. An image projector introduces image illumination into the LOE so as to propagate by internal reflection. The image projector includes one or more light-generating laser diode operated by a controller. A coupling-out arrangement includes a set of mutually-parallel, partially-reflective surfaces associated with the LOE at an oblique angle to the major external surfaces for coupling the illumination out of the LOE towards the eye of the observer. The light-generating laser diode has a characteristic variation of coherence length of generated light as a function of diode actuation power. The controller actuates the laser diode at a level of diode actuation power that generates light with a coherence length that is less than twice a spacing between adjacent partially-reflective surfaces of the coupling-out arrangement.

公开(公告)号：US20200310024A1

公开(公告)日：2020-10-01

申请号：US16638495

申请日：2020-01-26

Applicant: Lumus Ltd.

Inventor： Yochay Danziger ,  Ronen Chriki ,  Jonathan Gelberg

IPC: F21V8/00 ,  G02B27/14 ,  G02B27/01

Abstract: An optical system including a light-guide optical element (LOE) with first and second sets (204, 206) of mutually-parallel, partially-reflecting surfaces at different orientations. Both sets of partially-reflecting surfaces are located between parallel major external surfaces. A third set of at least partially-reflecting surfaces (202), deployed at the coupling-in region, receive image illumination injected from a projector (2) with an optical aperture having a first in-plane width and direct the image illumination via reflection of at least part of the image illumination at the third set of at least partially-reflective facets towards the first set of partially-reflective facets with an effective optical aperture having a second width larger than the first width.