Patterned dimmer material and production thereof

Abstract

Abstract PURPOSE:To allow the generation and disappearance of white opaque patterns or watermarks by having the white opaque parts where liquid crystals are dispersed in the form of liquid drops of a small diameter and the thin white opaque parts where the liquid crystals are dispersed in the form of liquid drops of a large diameter. CONSTITUTION:The white opaque parts 4a to 4c of a liquid crystal layer 1 are formed by dispersing the liquid crystals, which are separated in phases by rapidly photosetting a photosetting type resin matrix, in the form of the small liquid crystal drops of the nearly uniform grain size of about 1mum. The extraordinary light refractive index of the small liquid crystal drops and the refractive index of the photosetting type resin matrix vary and, therefore, incident light is scattered and the white opaque state is exhibited in the absence of voltage impression. The thin transparent parts 40, as against the above-mentioned parts, are formed by dispersing the greater part of the liquid crystals, which are separated in phases by gradually curing the photosetting type resin matrix, in the form of the liquid crystal drops of the large diameter while allowing the liquid crystals to grow. The small liquid crystal drops contributing to the scattering of visible light are contained at a lesser ratio in these parts and the white opaque state thinner than the white opaque state of the small liquid crystal drops is exhibited. The watermarks which are nearly transparent or white opaque patterns are generated in this way in the absence of the voltage impression. The entire part of the liquid crystal layer turns transparent and the patterns disappear when the voltage is impressed.

Inventors

• 👤 Hidemi Ito
• 👤 秀己 伊藤
• 👤 Koichi Iwata
• 👤 宏一 瀬
• 👤 Sumihito Nakagawa
• 👤 純人 中川
• 👤 Ryuichi Kawashima
• 👤 川島　龍市

Bibliographic Details