PURPOSE: To reduce the loss of liquid crystal by impregnating an injection unit with a necessary amount of liquid crystal while the injection unit does not contact the injection port of a liquid crystal cell, and bringing the injection unit into contact with the injection port of the liquid crystal cell after pressure reduction processing and then performing pressure releasing processing.
CONSTITUTION: The injection unit 6 is made of fiber cloth which is neutral to the liquid crystal 1 and is easily impregnated with the liquid crystal 1. The injection unit 6 and the injection port 3 of the cell 2 are arranged without contacting each other, and the part of the fiber cloth 4 of the injection unit 6 is impregnated with a constant amount of liquid crystal 1. Then, a vacuum container is evacuated immediately to a high vacuum. The fiber cloth 4 is impregnated and the surface area of the liquid crystal 1 increases greatly, so a defoaming treatment is completed in an extremely short time and the amount of evaporation of the liquid crystal is extremely small even under a high vacuum, so that no deterioration occurs. Then, the injection unit 6 is brought into contact with the injection port 3 and inert gas is injected into the vacuum container to return the pressure, so that the liquid crystal 1 with which the fiber cloth 4 is impregnated is injected into the cell 2 by the pressure difference.
MORI KIJU
AKANUMA YOICHIRO
| JPS6041017A | 1985-03-04 |