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:
Apr. 21, 2026
Filed:
Mar. 05, 2021
E Ink Corporation, Billerica, MA (US);
E Ink Corporation, Billerica, MA (US);
Abstract
Display devices for displaying a pattern are disclosed. In one arrangement, a pixel element having a layered structure is provided. The layered structure comprises at least one phase change material layer thermally switchable between at least a stable high extinction coefficient state and a stable low extinction coefficient state. A ratio of a mean average over the visible spectrum of the extinction coefficient of the phase change material layer in the high extinction coefficient state to a mean average over the visible spectrum of the extinction coefficient of the phase change material layer in the low extinction coefficient state is greater than 3.0. A mean average over the visible spectrum of the extinction coefficient in the high extinction state is less than 1.0.