Title:
INPUT DEVICE FOR COMPUTER CONTROLLED VISUAL INDICATOR
Document Type and Number:
Japanese Patent JPS54151327
Kind Code:
A
Abstract:
An input device for a computer controlled visual display enables an operator to instruct the shift of a display element in a chosen direction by hand movement of the input device sensor in an analogous direction over a plane surface. The sensor includes a conventional piezoelectric audio pick-up which produces a succession of unidirectional pulses when the stylus is drawn across a microscopically textured surface such as a sheet of paper, the polarity of the pulses being indicative of the direction of motion along a selected axis. A second pick-up is arranged to give a maximum response to motion along an orthogonal axis and for the component of motion on each axis a bi-directional pulse counter enables the direction of motion to be determined by a comparison of the counts held in successive time intervals.
Inventors:
IAN PEEJI
Application Number:
JP2547479A
Publication Date:
November 28, 1979
Filing Date:
March 05, 1979
Export Citation:
Assignee:
NAT RES DEV
International Classes:
G06F3/023; G06F3/033; G06F3/038; G06F3/041; (IPC1-7): G06F3/02; G06K9/00; G06K15/18