Method of using display device utilizing polymer-polymer miscibilities

Abstract

Abstract A DISPLAY DEVICE IS DISCLOSED WHICH COMPRISES A FILM, COATING OR BODY EITHER SUPPORTED OR UNSUPPORTED, OF A COMBINATION OF AT LEAST TWO POLYMERIC FILM-FORMING MATERIALS. THE ELIGIBLE POLYMERIC MATERIALS CAN EXIST IN ONE OF TWO SOLID STATES, EITHER BEING MUTUALLY MISCIBLE OR BEING MUTUALLY IMMISCIBLE. IN THE STATE OF IMIMISCIBILITY, THE POLYMERIC MATERIALS, WHEN CAST FORM A HAZY BODY; WHILE, IN THE MISCIBLE STATE, A CAST BODY IS SUBSTANTIALLY TRANSPARENT. IMAGING IS ACHIEVED, IN A BODY OF INITIALLY HAZY MATERIAL, BY CONVERTING THE BODY TO A TRANSPARENT CONFORMATION IN THE IMAGE PATTERN AND; INA BODY OF TRANSPARENT MATERIAL, IMAGING IS ACCOMPLISHED BY CAUSING A HAZE TO FORM, THAT IS, BY CAUSING THE POLYMERS TO BECOME IMMISCIBLE IN THE IMAGE PATTERN. THE CHANGE FROM MISCIBILITY TO IMMISCIBILITY AND VICE VERSA, IN FILMS OF THE DISPLAY DEVICE OF THIS INVENTION, CAN BE ACCOMPLISHED BY ANY OF SEVERAL MEANS, SUCH AS BY CONTACTING THE FILMS WITH APPROPRIATE SOLVENTS, CHANGING OR SUBJECTING THE FILMS TO TEMPERATURE GREDIENTS IN THE PROPER RANGES, OR SUBJECTING THE FILMS TO PRESSURE GRADIENTS SUCH AS BY WRITING WITH A STYLUS.

Inventors

• 👤 Antoinette M Purcell
• 👤 Curt Thies
• 👤 Morris I Bank
• 👤 James W Leffingwell

Bibliographic Details