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1. 发明申请

US20220390743A1 GHOST IMAGE FREE HEAD-UP DISPLAY 有权
公开(公告)号：US20220390743A1
公开(公告)日：2022-12-08
申请号：US17771316
申请日：2020-10-23
申请人： Cambridge Enterprise Limited
发明人： Chu Daping , Yuanbo Deng
IPC分类号： G02B27/01 , G02B30/33 , G09G3/00
摘要： An image generation system for providing a ghost image free head-up display, the system comprising a display screen having a front surface and a back surface, a picture generation unit for projecting an image towards the display screen for reflection towards a predetermined eye box, and a field lens, wherein the picture generation unit is configured to project light through the field lens such that light is incident on the front surface of the display screen forming a first virtual image, wherein a portion of the light is transmitted through the display screen and is incident on the back surface of the display screen forming a second virtual image, wherein the first and second virtual images have an offset, wherein the field lens is configured such that the offset is below a threshold magnitude and the first and second virtual images are substantially overlaid as viewed from the eye box.

2. 发明公开

US20230393387A1 GHOST IMAGE FREE PROJECTION AT ARBITRARY DISTANCE 审中-公开
公开(公告)号：US20230393387A1
公开(公告)日：2023-12-07
申请号：US18033225
申请日：2021-10-21
申请人： CAMBRIDGE ENTERPRISE LIMITED
发明人： Daping Chu , Yuanbo Deng
IPC分类号： G02B27/00 , G02B27/01 , G02B5/02
CPC分类号： G02B27/0018 , G02B5/0252 , G02B27/0103
摘要： An image generation system for providing a ghost image free head-up display, the system comprising a display screen having a front surface and a back surface, a picture generation unit for projecting an image towards the display screen for reflection towards an eye box, a field lens, and an anisotropic optical component having a first optical power along a first axis and second optical power along a second axis, wherein the first and second axis are perpendicular, wherein the picture generation unit is configured to project light through the field lens such that light is incident on the front surface of the display screen forming a first virtual image, wherein a portion of the light is transmitted through the display screen and is incident on the back surface of the display screen forming a second virtual image, wherein the first and second virtual images are offset along the first axis, wherein the field lens is configured to project the first virtual image at a first projection distance and the second virtual image at a second projection distance such that the offset is below a threshold magnitude and the first and second virtual images are substantially overlaid as viewed from the eye box, and wherein the anisotropic optical component is configured to magnify the first and second virtual image along the second axis only.

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