Touch panel system and electronic device

Patent metadata

Field	Value
Publication number	US-9013448-B2
Application number	US-201214127455-A
Country	US
Kind code	B2
Filing date	Jun 15, 2012
Priority date	Jun 22, 2011
Publication date	Apr 21, 2015
Grant date	Apr 21, 2015

Abstract

A touch sensor panel disclosed herein includes: a plurality of vertical electrodes ( 6 ); and a plurality of horizontal electrodes ( 7 ), the plurality of vertical electrodes ( 6 ) and the plurality of horizontal electrodes ( 7 ) (i) being so disposed that, as viewed in the direction perpendicular to a substrate, the plurality of vertical electrodes ( 6 ) include no segment coincident with the plurality of horizontal electrodes ( 7 ) and (ii) forming a uniform grid having no gap.

First claim

The invention claimed is:

1. A touch panel system comprising,
a touch panel; and
a touch panel controller for processing a signal supplied from the touch panel,
the touch panel including a sensor section, the sensor section being provided with a plurality of sense lines and detecting a touch operation performed with respect to the touch panel,
the touch panel controller including a subtracting section for (i) receiving signals from the sensor section and (ii) finding differences in signal between, among the sense lines, respective pairs of sense lines adjacent to each other,
the touch panel system further comprising:
drive lines provided so as to intersect the sense lines;
a drive line driving circuit for driving the drive lines in parallel; and
capacitances being formed between the sense lines and the drive lines,
the subtracting section receiving output signals from the sense lines, and finding differences between the capacitances on each of the drive lines in a direction in which the each of the drive lines extends, the differences being found as the differences in signal between the respective pairs of the sense lines adjacent to each other,
the touch panel system further comprising:
a decoding section for decoding the values of the differences between the capacitances, which differences are found by the subtracting section, the decoding being carried out in such a manner that an inner product of each of code sequences for driving the drive lines in parallel and each of difference output sequences of the sense lines, which difference output sequences correspond to the code sequences, is calculated; and
a switch for switching a signal to be supplied to the subtracting section so that the subtracting section finds a first difference which is expressed by (Sn+1)−Sn or a second difference which is expressed by Sn−(Sn−1),
the first difference corresponding to a difference between (i) a signal of a sense line Sn which is selected from the plurality of sense lines and (ii) a signal of a sense line Sn+1, which is one of two sense lines adjacent to the sense line Sn, the two sense lines being the sense line Sn+1 and a sense line Sn−1 each of which is included in the plurality of sense lines,
the second difference corresponding to a difference between (i) the signal of the sense line Sn and (ii) a signal of the sense line Sn−1, which is the other one of the two sense lines,
the touch panel further comprising:
a plurality of vertical electrodes (i) each including a repeat of first basic shapes connected to one another in a vertical direction, the first basic shapes each including a fine wire, (ii) provided on a vertical electrode surface, and (iii) arranged at a predetermined interval in a horizontal direction;
a plurality of horizontal electrodes (i) each including a repeat of second basic shapes connected to one another in the horizontal direction, the second basic shapes each including a fine wire, (ii) provided on a horizontal electrode surface parallel to the vertical electrode surface, and (iii) arranged at a predetermined interval in the vertical direction; and
an insulator provided between the vertical electrode surface and the horizontal electrode surface so as to insulate the plurality of vertical electrodes and the plurality of horizontal electrodes from each other,
the plurality of vertical electrodes and the plurality of horizontal electrodes (i) being disposed so that, as viewed in a direction perpendicular to the vertical electrode surface, the plurality of vertical electrodes include no segment coincident with the plurality of horizontal electrodes and (ii) forming a uniform grid having no gap.

2. The touch panel system as set forth in claim 1 , wherein:
the switch includes two terminals, the switch being arranged such that one of the two terminals is selected;
the code sequences for driving the drive lines in parallel are the following code sequences (a component is 1 or −1) for driving the first drive line through the Mth drive line in parallel,

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Assignees

• Miyamoto Masayuki
• Yumoto Manabu
• Yoshida Shinichi
• Takahama Kengo
• Sharp Kk

Inventors

• Miyamoto Masayuki
• Yumoto Manabu
• Yoshida Shinichi
• Takahama Kengo

Classifications

• G06F3/0418 Primary

  for error correction or compensation, e.g. based on parallax, calibration or alignment · CPC title

• G06F3/044

  by capacitive means · CPC title

• G06F2203/04111

  Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate · CPC title

• G06F3/0416

  Control or interface arrangements specially adapted for digitisers · CPC title

• G06F3/0446

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title