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:
Aug. 08, 2023
Filed:
Mar. 23, 2022
E Ink California, Llc, Fremont, CA (US);
Xiaolong Zheng, Fremont, CA (US);
Pubudu Thilanka Galwaduge, Fremont, CA (US);
Craig Lin, Fremont, CA (US);
Yih-Ming Kang, Fremont, CA (US);
HongMei Zang, Fremont, CA (US);
Hui Du, Milpitas, CA (US);
E INK CALIFORNIA, LLC, Fremont, CA (US);
Abstract
A method for collimating light using a film including elongated chambers of bistable electrophoretic fluids. The light-collimating films are suitable to control the amount and/or direction of light incident to a transmissive substrate. Such films may be integrated into devices, such as LCD displays, to provide a zone of privacy for a user viewing the LCD display. Because the light-collimating film is switchable, it allows a user to alter the collimation of the emitted light on demand. Because the films are bistable, they do not require additional power after they have been switched to a display state.