Method for injecting liquid crystal exhibiting ferroelectric property

Abstract

Abstract PURPOSE:To fill a liquid crystal cell with a liquid crystal material having uniform compsn. ratios over the entire surface by maintaining the liquid crystal material at the temp. above the highest temp. among the respective Iso transfer temps. of the liquid crystal molecules constituting the liquid crystal material and maintaining the liquid crystal material and liquid crystal cell at said temp. or above during the injection of said material. CONSTITUTION:A liquid crystal injection port 7 of the cell 1 is provided by a relatively large aperture on one side of the cell 1. The liquid crystal cell 1 is heated by a heater 2 and is evacuated to a vacuum together with a vacuum vessel 3 by a discharge system provided on the outside of the vessel. The liquid crystal which exhibits a ferroelectric property is thereafter supplied to the injection port of the cell 7 by a dispenser 4 having a liquid crystal pool and the liquid crystal material is heated by heaters 5 and 6 at this time so that the entire part has the Iso phase, liquid phase, disordered phase and isotropic phase. N2 is then supplied at a prescribed flow rate into the vacuum vessel and the liquid crystal is injected into the cell by a pressure difference. The liquid crystal material exhibits the Iso phase as the cell is kept heated by the heater 2 during the injection. The material having the uniform compsn. ratios is thus injected into the cell over the entire surface of the cell. The uniform cell which has no fluctuations in the characteristics of the liquid crystal material in the cell after the injection of the liquid crystal material is thereby produced.

Inventors

• 👤 Toshio Watanabe
• 👤 Masahiko Sato
• 👤 Hiroyuki Sakayori
• 👤 Akio Osabe
• 👤 Akira Mase

Bibliographic Details