Touch detector and method of driving the same, display with touch detection function, and electronic unit
First Claim
1. A touch detector comprising:
- 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,wherein a scanning pitch in the scanning drive is smaller than the total width of the plural number of selected target electrodes.
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Accused Products
Abstract
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.
90 Citations
19 Claims
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1. A touch detector comprising:
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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, wherein a scanning pitch in the scanning drive is smaller than the total width of the plural number of selected target electrodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A touch detector comprising:
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a plurality of 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 drive signal 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 plural number of selected target electrodes. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method of driving a touch detector comprising:
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sequentially selecting a predetermined plural number of target electrodes from a plurality of drive electrodes, which is arranged side by side to extend in one direction, 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 with a scanning pitch, the scanning pitch being smaller than the total width of the plural number of selected target electrodes; and detecting the external adjacent object based on a detection signal of a detection electrode which extends in a direction orthogonal to a direction where the drive electrodes extend and is arranged to form a capacitance at each of intersections with the drive electrodes.
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17. A display with a touch detection function comprising:
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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; a display element performing display based on a pixel signal and a display drive signal; and a scanning drive section performing a first scanning drive sequentially applying the display drive signal to the plurality of drive electrodes in a time-divisional manner, and a second scanning drive 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, wherein a scanning pitch in the second scanning drive is smaller than the total width of the plural number of selected target electrodes.
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18. A display comprising:
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a plurality of drive electrodes; a display element performing display based on a display drive signal; a scanning drive section sequentially applying the display drive signal to the plurality of drive electrodes in a time-divisional manner and performing a scanning drive sequentially selecting a predetermined plural number of target electrodes from the plurality of drive electrodes in a time-divisional manner and applying a drive signal to the selected target electrodes, wherein a scanning pitch in the scanning drive is smaller than the total width of the plural number of selected target electrodes.
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19. An electronic unit comprising:
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a touch detector; and a control section performing operation control with use of the touch detector, wherein 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; 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, and a scanning pitch in the scanning drive is smaller than the total width of the plural number of selected target electrodes.
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Specification