公开(公告)号：US11333884B2

公开(公告)日：2022-05-17

申请号：US16487709

申请日：2017-06-13

Applicant: LG ELECTRONICS INC.

Inventor： Youngjin Kim ,  Dongwook Kim ,  Juhyeok Ryu ,  Sangok Yeo ,  Kyoungil Lee ,  Seunggyu Lee

IPC: G02B27/14 ,  G03H1/00 ,  G02F1/03 ,  G09G5/00 ,  H04N7/00 ,  G02F1/1335 ,  G02B27/01 ,  B60K35/00 ,  G02B27/28

Abstract: A head-up display for a vehicle, according to one embodiment of the present invention, may comprise: an image source which emits a linearly-polarized light having a first direction; a prism which refracts one portion of the linearly-polarized light emitted from the image source; an electric polarization conversion element which, when turned off, transmits another portion of the linearly-polarized light emitted from the image source, and when turned on, half-wavelength-converts the another portion of the linearly-polarized light emitted from the image source into a linearly-polarized light having a second direction orthogonal to the first direction; a first reflection mirror which reflects light to a windshield of a vehicle; a polarization reflection mirror which is disposed so as to be spaced apart from the first reflection mirror, reflects the linearly-polarized light having the first direction, and transmits the linearly-polarized light having the second direction; and a second reflection mirror which is disposed so as to be spaced apart from the polarization reflection mirror, and reflects the light transmitted through the polarization reflection mirror to the polarization reflection mirror.

公开(公告)号：US10012836B2

公开(公告)日：2018-07-03

申请号：US15583416

申请日：2017-05-01

Applicant: LG ELECTRONICS INC.

Inventor： Dongwook Kim ,  Youngjin Kim ,  Kyoungil Lee ,  Seunggyu Lee ,  Juhyeok Ryu

IPC: G02B27/01 ,  B60K35/00 ,  G02B5/30

CPC classification number: G02B27/0101 ,  B60K35/00 ,  B60K2370/347 ,  G02B5/30 ,  G02B2027/015

Abstract: A head up display for a vehicle including an imaging device configured to emit first linearly polarized light in a first direction and second linearly polarized light in a second direction perpendicular to the first direction; a polarizing reflection mirror through which the first linearly polarized light is transmitted and from which the second linearly polarized light is reflected; a second reflection mirror spaced apart from the polarizing reflection mirror and at which the first linearly polarized light transmitted through the polarizing reflection mirror is reflected to the polarizing reflection mirror; and a first reflection mirror spaced from the polarizing reflection mirror and configured to reflect the second linearly polarized light reflected from the polarizing reflection mirror to a windshield of the vehicle to produce a first image having a first length from the windshield, and to reflect the first linearly polarized light reflected from the second reflection mirror and transmitted through the polarizing reflection mirror to the windshield of the vehicle to produce a second image having a second length from the windshield different than the first length.