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:
Jul. 20, 1993
Filed:
Apr. 14, 1992
International Business Machines Corporation, Armonk, NY (US);
Abstract
The present invention relates in general to color liquid crystal displays and more particularly to color liquid crystal displays in which the color filter functions as the orientation layer. A film which functions as both an orientation layer controlling the orientation of liquid crystal molecules and as a color filter is described. A process for producing the combination film is also described. The process comprises synthesizing a polyimide precursor by the ring-opening polyaddition reaction of a diamine component and an acid anhydride component in a solvent. Wherein the diamine component has a predetermined structure. Further, the acid anhydride component has a predetermined structure. Finally, the process includes the step of dispersing coloring materials in the polyimide precursor to form the filter.