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:
Dec. 20, 2022
Filed:
Feb. 19, 2020
Applicant:
Largan Medical Co., Ltd., Taichung, TW;
Inventors:
Wei-Yuan Chen, Taichung, TW;
Po-Tsun Chen, Taichung, TW;
Wei-Chun Chen, Taichung, TW;
Chun-Hung Teng, Taichung, TW;
Assignee:
LARGAN MEDICAL CO., LTD., Taichung, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 11/06 (2006.01); G02C 7/04 (2006.01); C09B 23/10 (2006.01);
U.S. Cl.
CPC ...
C09K 11/06 (2013.01); C09B 23/105 (2013.01); G02C 7/04 (2013.01); C09K 2211/1007 (2013.01); G02C 2202/16 (2013.01);
Abstract
A contact lens includes at least one color changeable region, wherein the color changeable region includes at least one photoluminescence material. When a wavelength of the photoluminescence material having a maximum radiation intensity is WEmMx, an average transmittance in a wavelength range of 400 nm-700 nm of the color changeable region is T4070, a size of a total area of the color changeable region is AC, and a size of a total area of the contact lens is AL, certain conditions relating to WEmMx, T4070 and AC/AL are satisfied.