Communications – electrical: acoustic wave systems and devices – Distance or direction finding – With plurality of transducers
Patent
1991-05-29
1992-09-01
Pihulic, Daniel T.
Communications, electrical: acoustic wave systems and devices
Distance or direction finding
With plurality of transducers
367907, 178 18, G09G 302
Patent
active
051445948
ABSTRACT:
An acoustic mouse system is described that controls indications on an X-Y surface of the face of a display. The system comprises a support for holding at least three acoustic receivers in an x-y plane, and a hand movable acoustic transmitter that is movable both parallel to the x-y plane and in a z direction perpendicular to the x-y plane. The transmitter generates periodic acoustic oscillations in the direction of the support and its receivers. Detection circuitry, responsive to signals from the acoustic receivers, provides signals indicative of the absolute position of the acoustic transmitter in the x-y plane. A processor is responsive to the signals from the detection circuitry to provide absolute position signals to the display, whereby the display responds by moving an indication to a corresponding position on the X-Y surface of the display face. The detector circuitry is further enabled to provide z position signals to the display, whereby the display may modify a display function in accordance with the z position signals.
REFERENCES:
patent: 4012588 (1977-03-01), Davis et al.
patent: 4814552 (1989-03-01), Stefik et al.
patent: 4862152 (1989-08-01), Milner
patent: 4991148 (1991-02-01), Gilchrist
Cyber Scientific
Pihulic Daniel T.
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