Coordinates input device using liquid crystal sheet

Details Coordinates input device using liquid crystal sheet Coordinates input device using liquid crystal sheet

1997-02-07

1999-09-07

Sikes, William L.

Liquid crystal cells, elements and systems

Particular excitation of liquid crystal

Magnetic or pressure excitation

G02F 1133

Patent

active

059495014

ABSTRACT:
A coordinates input device includes: a liquid crystal sheet comprising a conductive layer, a transparent high electric resistant layer, a liquid crystal-dispersed polymer layer, and a transparent insulating layer, all of which are sequentially laminated on a board; and a tablet comprising a Y-axis coordinate resistant sheet, a pressure sensitive sheet, an electrode sheet, a pressure sensitive sheet, an X-axis coordinates resistant sheet, and a flexible film for protection, all of which are sequentially laminated on a base. The Y-axis coordinates resistant sheet and the X-axis coordinates resistant sheet are connected to a detecting circuit for detecting coordinates indicated by a coordinates indicator.

REFERENCES:
patent: 5111316 (1992-05-01), Nobile et al.
patent: 5115330 (1992-05-01), Nobile et al.
patent: 5117297 (1992-05-01), Nobile et al.
patent: 5136404 (1992-08-01), Nobile et al.
patent: 5357266 (1994-10-01), Tagawa
patent: 5592197 (1997-01-01), Tagawa
patent: 5610629 (1997-03-01), Buar

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