Determining the location of the tip of an electronic stylus

Details Determining the location of the tip of an electronic stylus Determining the location of the tip of an electronic stylus

2003-02-14

2009-02-10

Hjerpe, Richard (Department: 2629)

Computer graphics processing and selective visual display system

Display peripheral interface input device

Stylus

C345S173000, C345S177000, C178S018040, C178S019020, C178S019070

Reexamination Certificate

active

07489308

ABSTRACT:
An electronic stylus system includes an electronic stylus and base receiving unit. The electronic stylus includes a first ultrasonic transmitter, a second ultrasonic transmitter, an electromagnetic transmitter, and a writing tip. The base receiver unit includes a first ultrasonic receiver, a second ultrasonic receiver, and an electromagnetic receiver. The ultrasonic receivers of the base unit are operable to receive signals transmitted by the ultrasonic transmitters of the electronic stylus. Similarly, the electromagnetic receiver of the base unit is operable to receive signals transmitted by the electromagnetic transmitter of the stylus. The location of the tip of the electronic stylus relative to a given reference point is determined using the locations of two ultrasonic transmitters relative to the two ultrasonic receivers.

REFERENCES:
patent: 5410496 (1995-04-01), Bolon et al.
patent: 5717168 (1998-02-01), DeBuisser et al.
patent: 6184873 (2001-02-01), Ward et al.
patent: 7006407 (2006-02-01), Davies et al.
patent: 08-137610 (1996-05-01), None

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