Position information input method and device

Details Position information input method and device Position information input method and device

1994-12-07

1996-06-25

Brier, Jeffery

Computer graphics processing and selective visual display system

Display peripheral interface input device

Touch panel

345160, G09G 508

Patent

active

055304567

ABSTRACT:
Light rays emitted from light-emitting units pass through a window of a housing and are reflected by a finger pad of a finger. The reflected light rays again pass through the window and are received by light-receiving elements of each of light-receiving units. These light-receiving elements output reflected light detection signals corresponding to the ridges and recesses of the finger pad. From these reflected light detection signals, a wave-shaping unit outputs rectangular wave signals indicating the moving amount of the finger pad and moving direction signals indicating the moving direction of the finger pad for the individual axes.

REFERENCES:
patent: 4254333 (1981-03-01), Bergstrom
patent: 4951034 (1990-08-01), Mazzone et al.
patent: 5063289 (1991-11-01), Jasinski et al.

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