Optical: systems and elements – Holographic system or element – Having optical element between object and recording medium
Patent
1994-04-18
1995-12-19
Sikes, William L.
Optical: systems and elements
Holographic system or element
Having optical element between object and recording medium
359 62, 141 7, G02F 11341, B65B 3102
Patent
active
054773490
ABSTRACT:
A liquid crystal injecting method, wherein the area of a portion of a liquid crystal cell, which is dipped in a liquid crystal contained in a liquid crystal vessel, is reduced to a minimum, thereby preventing the liquid crystal in the vessel from being contaminated with foreign matter and reducing the amount of the liquid crystal which unnecessarily adheres to the outer surface of the cell. The liquid level of the liquid crystal in the vessel is detected by a sensor. Liquid crystal is supplied to the vessel on the basis of the detected liquid level to maintain the liquid level at a predetermined height. A portion of the liquid crystal is raised. A liquid crystal injecting port of the cell is dipped into the raised portion of the liquid crystal after an inner space of the cell is evacuated. Thus, the liquid crystal is injected into the cell. Since only the injecting port of the cell is dipped into the liquid crystal in the vessel, the area of the cell which contacts the liquid crystal is reduced, thereby preventing the liquid crystal from contamination by foreign matters adhering to the cell. Further, since the amount of the liquid crystal adhered to the outer surface of the cell is reduced, the liquid crystal can be saved.
REFERENCES:
patent: 4099550 (1978-07-01), Matsuzaki et al.
patent: 4753276 (1988-06-01), Inaba et al.
patent: 5029623 (1991-07-01), Brosig
patent: 5269351 (1993-12-01), Yoshihara
Casio Computer Co. Ltd.
Duong Tai V.
Sikes William L.
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