Patents Assigned to Integrated Touch Arrays, Inc.
  • Patent number: 4733222
    Abstract: A capacitance-variation-sensitive touch sensing array system includes an array of electrodes where each electrode is a connected series of conductive tabs and forms either a row or a column of the electrode array; an array of drive lines where each drive line is capacitively coupled to a plurality of the electrodes; a drive signal generator for applying alternating signal packets to the drive lines; an array of sense lines where each sense line is capacitively coupled to a plurality of the electrodes so that signals are derived from the electrodes when drive signals are applied to the drive lines. The number of electrodes is equal to the product of the number of drive lines and the number of sense lines. Based on values derived from signals on the sense lines, a microprocessor provides information associated with touch by an operator.
    Type: Grant
    Filed: April 18, 1986
    Date of Patent: March 22, 1988
    Assignee: Integrated Touch Arrays, Inc.
    Inventor: John W. Evans