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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11333884 B1

PDFFull Text
Date of Patent:
May. 17, 2022

Filed:

Jun. 13, 2017

Head up display for vehicle

Applicant:

Lg Electronics Inc., Seoul, KR;

Inventors:

Youngjin Kim, Seoul, KR;

Dongwook Kim, Seoul, KR;

Juhyeok Ryu, Seoul, KR;

Sangok Yeo, Seoul, KR;

Kyoungil Lee, Seoul, KR;

Seunggyu Lee, Seoul, KR;

Assignee:

LG ELECTRONICS INC., Seoul, KR;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Dawayne Pinkney

Int. Cl.
CPC ...
G02B 27/14 (2006.01); G03H 1/00 (2006.01); G02F 1/03 (2006.01); G09G 5/00 (2006.01); H04N 7/00 (2011.01); G02F 1/1335 (2006.01); G02B 27/01 (2006.01); B60K 35/00 (2006.01); G02B 27/28 (2006.01);
U.S. Cl.
CPC ...
G02B 27/0101 (2013.01); B60K 35/00 (2013.01); G02B 27/0149 (2013.01); G02B 27/283 (2013.01); G02B 27/286 (2013.01); B60K 2370/1529 (2019.05); B60K 2370/39 (2019.05); G02B 2027/015 (2013.01); G02B 2027/0127 (2013.01); G02B 2027/0145 (2013.01);
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.

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