TOUCH DETECTOR AND METHOD OF DRIVING THE SAME, DISPLAY WITH TOUCH DETECTION FUNCTION, AND ELECTRONIC UNIT HAVING PLURAL DIFFERENT DRIVE ELECTRODES

摘要

A touch detector capable of achieving high position resolution while improving detection sensitivity to a touch is provided. The touch detector includes: a plurality of drive electrodes arranged side by side to extend in one direction; a detection electrode extending in a direction orthogonal to a direction where the drive electrodes extend, and arranged to form a capacitance at each of intersections with the drive electrodes; and a scanning drive section sequentially selecting a predetermined plural number of target electrodes from the plurality of drive electrodes in a time-divisional manner, and applying a touch detection drive signal with a plurality of pulse waveforms for detecting an external adjacent object to the selected target electrodes to perform a scanning drive. A scanning pitch in the scanning drive is smaller than the total width of the plural number of selected target electrodes.

主权项

1. A touch detector comprising:
a plurality of drive electrodes arranged side by side to extend in a first direction; a detection electrode extending in a second direction orthogonal to the first direction, and arranged to form a capacitance at each of intersections with the drive electrodes; and a scanning drive section sequentially selecting a plurality of target electrodes from the drive electrodes in a time-divisional manner, and applying a touch detection drive signal with a plurality of pulse waveforms for detecting an external object to the selected target electrodes to perform a scanning drive, wherein a scanning pitch in the scanning drive is smaller than the total width of the selected target electrodes in a drive area; the scanning drive section sequentially selects the target electrodes by shifting the drive area by the scanning pitch so that the shifted drive area includes a part of the most recently selected target electrodes; the drive electrodes include a predetermined number of kinds of drive electrodes, and the predetermined number of kinds of drive electrodes are alternatingly arranged side by side; and in the scanning drive, while the touch detection drive signal is simultaneously applied to one target electrode in addition to the predetermined number of target electrodes selected from the predetermined number of kinds of drive electrodes which are alternatingly arranged side by side, scanning is performed to shift the target electrodes by the predetermined number of target electrodes at a time.