公开(公告)号：US20170261746A1

公开(公告)日：2017-09-14

申请号：US15063850

申请日：2016-03-08

Applicant: Sharp Kabushiki Kaisha

Inventor： Ka Ho TAM ,  David James MONTGOMERY

IPC: G02B27/01 ,  H04N13/00 ,  H04N13/04 ,  G09G3/00 ,  G06T19/00

CPC classification number: G02B27/0101 ,  G02B2027/0118 ,  G06T19/006 ,  G09G3/002 ,  H04N13/156 ,  H04N13/332 ,  H04N13/344 ,  H04N2213/001

Abstract: A head-up-display (HUD) system includes at least one scanning laser projector operative to generate laser light, and a stacked array of multiple-switchable screens arranged relative to the projector to receive laser light generated by the projector, each screen of the stacked array of multiple-switchable screens spaced apart from one another and operative to switch between a transparent state and a diffusive state. A controller is operatively coupled to the stacked array of multiple-switchable screens, the controller configured to time sequentially switch each screen of the array from a transparent state to a diffusive state, wherein only one screen is switched to the diffusive state at any given time. An output of the projector is arranged at an angle or a distance from imaging optics succeeding the array of screens to prevent a specular beam emitted by the at least one scanning laser projector from intercepting the imaging optics succeeding the array of screens when all screens are in the transparent state.

公开(公告)号：US20200081254A1

公开(公告)日：2020-03-12

申请号：US16469539

申请日：2017-12-14

Applicant: Sharp Kabushiki Kaisha

Inventor： Ka Ho TAM ,  David James MONTGOMERY

IPC: G02B27/01 ,  G02B3/08

Abstract: An optical system enables high image quality Head Mounted Displays to be made more compact and/or of reduced weight. The optical system includes at least two or more image panels per eye, two or more reflective surfaces per image panel, and a refractive eyepiece element. Light from each image panel is reflected by a distinct set of optical surfaces before reaching the eye, forming at least two overlapping virtual images per eye. The invention may allow the apparatus to have a compact form factor with weight distribution close to the user's face without compromising on image quality and resolution.