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. 28, 2004
Filed:
Jul. 01, 2002
Norihito Itoh, Tokyo-To, JP;
Abstract
A cholesteric liquid crystal coating film ′ is formed on an alignment layer provided on a glass substrate (FIG. ( )), and is subjected to a thermal alignment process at a temperature equal to or higher than the liquid crystalline phase transition temperature of a chiral nematic liquid crystal that constitutes the coating film (FIG. ( )). Active rays capable of activating optically active groups in the chiral nematic liquid crystal are applied to the cholesteric liquid crystal coating film ′ to deactivate the optically active groups, thereby forming a cholesteric layer having color-indicating regions with the desired areas and indication colors that have been created according to the active-rays-applied area and to the amount of active rays applied to the area (FIG. ( )). Thereafter, this cholesteric layer is subjected to a thermal alignment process at a temperature lower than the liquid crystalline phase transition temperature of the chiral nematic liquid crystal (FIG. ( )). Lastly, a predetermined amount of ultraviolet light was applied to the cholesteric layer in an atmosphere in which the optically active groups are inactive, thereby three-dimensionally crosslinking the cholesteric layer for curing (FIG. ( )).