Handwritten character input device

Details Handwritten character input device Handwritten character input device

1984-10-10

1988-02-09

Miller, Stanley D.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340707, 350338, G02F 1133, G09G 302

Patent

active

047238364

ABSTRACT:
A handwritten character input device includes an opaque tablet or digitizer for inputting a handwritten character or figure into an apparatus. The tablet is of an electromagnetic induction type. The tablet is positioned under a liquid crystal display panel and an aluminum-evaporated film reflector is provided for the liquid crystal display. Preferably, the aluminum-evaporated film reflector is as thick as 1.0 micron or less. A conductive shield plate may be further provided between the tablet and a driving circuit substrate for the liquid crystal display panel. This shield plate serves to magnetically isolate the tablet from the driving substrate.

REFERENCES:
patent: 3846580 (1974-11-01), Brenner
patent: 4061418 (1977-12-01), Poensgen
patent: 4126383 (1978-11-01), Doriguzzi et al.
patent: 4451698 (1984-03-01), Whetstone
patent: 4497977 (1985-02-01), Saito
U.S. Journal: IBM Technical Disclosure Bulletin, vol. 14, No. 7, Dec. 1971, pp. 1963-1965.

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