Liouid crystal display element

Abstract

Abstract PURPOSE: To reduce the occurrence of orientation defect and induced domains despite glass frit sealing by using the specific polymer resin in orientation film. CONSTITUTION: A diamino diamide compound and tetra carboxylic acid dianhyhride are caused to react in an organic solvent such as N-methyl-2-pyrolidone. This solution is coated on a glass substrate provided with an inorganic insulation film such as SiO 2 on the lower layer or upper layer of transparent electrodes. The formed film is heated to become the polyisoindoloquinazolinedione polymer resin film of the closed ring formula (Ar 1 is residual groups of diamino diamide compound; Ar 2 is residual groups of tetra carboxylic acid dianhydride). After this hardened film is rubbed with a cloth or the like, it is frit-sealded at 450°C. This orientation film is superior in loss starting temperture and heating loss chracteristics and the liquid crystal display element has superior durability despite long-term current supplying. COPYRIGHT: (C)1979,JPO&Japio

Inventors

• 👤 Hisao Yokokura
• 👤 Fumio Nakano
• 👤 Tadashi Ito
• 👤 Katsu Tamura
• 👤 Satoru Ogiwara
• 👤 Tadashi Ishibashi
• 👤 Yasuhiko Shindo
• 👤 Masamichi Shibuya

Bibliographic Details