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.:
Date of Patent:
Oct. 15, 2019
Filed:
Aug. 13, 2018
Applicant:
Sichuan Longhua Film Co., Ltd, Mianyang, Sichuan, CN;
Inventors:
Rui-Min Diao, Mianyang, CN;
Yao-Chang Wang, Zhubei, TW;
Assignee:
SICHUAN LONGHUA FILM CO., LTD, Mianyang, CN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 27/01 (2006.01); G03B 21/56 (2006.01); G02B 26/02 (2006.01);
U.S. Cl.
CPC ...
G02B 27/0101 (2013.01); G03B 21/567 (2013.01); B60K 2370/334 (2019.05); G02B 26/02 (2013.01); G02B 2027/0118 (2013.01);
Abstract
A projection screen of a head-up display has a projection surface and a back surface opposite to the projection surface. The projection surface is used for receiving an image beam projected by an image projection component and reflecting part of the image beam. The projection screen includes a photochromic layer disposed on the transmission path of the image beam. When an ambient light irradiates the back surface of the projection screen, the transmittance of the photochromic layer decreases as the intensity of the ambient light increases.