Coordinate input apparatus

Details Coordinate input apparatus Coordinate input apparatus

1994-12-13

1998-04-07

Hjerpe, Richard

Computer graphics processing and selective visual display system

Display peripheral interface input device

Touch panel

345179, 178 18, 178 19, G09G 500

Patent

active

057369798

ABSTRACT:
Disclosed is a coordinate input apparatus including a vibrating input pen 3, a piezoelectric element 4 in the pen 3, a vibration transfer plate 8 and vibration sensors 6 provided around the vibration transfer plate 8. The vibrator 4 is driven by a vibrator driving circuit 2 to generate a vibration, which is transmitted to vibration transfer plate 8. The apparatus is capable of calculating coordinate thereon accurately with phase information of detected signal waveform.

REFERENCES:
patent: 4886943 (1989-12-01), Suzuki et al.
patent: 4910363 (1990-03-01), Kobayashi et al.
patent: 4931965 (1990-06-01), Kaneko et al.
patent: 5017913 (1991-05-01), Kaneko et al.
patent: 5070325 (1991-12-01), Tanaka et al.

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