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:
May. 23, 2023
Filed:
Jun. 17, 2022
Applicant:
E Ink California, Llc, Fremont, CA (US);
Inventors:
Craig Lin, Fremont, CA (US);
Xiaolong Zheng, Fremont, CA (US);
Yih-Ming Kang, Fremont, CA (US);
HongMei Zang, Fremont, CA (US);
Assignee:
E Ink California, LLC, Fremont, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/167 (2019.01); G02F 1/29 (2006.01);
U.S. Cl.
CPC ...
G02F 1/29 (2013.01);
Abstract
A switchable light-collimating film can be used as a privacy filter for computer monitors or other display devices. The film comprises a plurality of elongated chambers having pigment particles, the position of which can be controlled by the applied electric field. Distribution of the pigment particles throughout the elongated chambers, as opposed to their concentration on one side of the chambers, narrows the viewing angle to the light passing through the film and provides privacy of the viewing images to the user.