Touch sensor panel, touch panel system and electronic equipment
In a touch sensor panel 10 for inputting a position by a touch operation to a predetermined region, a plurality of drive lines DL disposed in one direction and a plurality of sense patterns SL disposed in another direction intersect each other and an electrode size of an electrode of a sense pattern (sense electrode pattern) in one direction disposed between adjacent intersections is switched between at least two electrode sizes of large and small. The configuration enables power consumption to be small while maintaining detection precision of a touched position.
1. A touch panel system comprising:
a touch sensor panel including:
a plurality of drive lines arranged in one direction;
a plurality of sense lines arranged in another direction so as to intersect with the plurality of drive lines in a plan view of the touch sensor panel;
a plurality of drive electrodes arranged along each drive line and between adjacent intersections of the drive line and the plurality of sense lines; and
a plurality of sense electrodes arranged along each sense line and between adjacent intersections of the sense line and the plurality of drive lines,
each drive electrode and/or each sense electrode being divided into a plurality of sub electrodes, the touch sensor panel being configured such that one or more of the sub electrodes of the plurality of drive electrodes and/or the plurality of sense electrodes are selectively usable to make each drive electrode and/or each sense electrode switchable between at least two electrode sizes of large and small,
a touched position detecting section for estimating or detecting a capacitance value after the capacitance value of electrostatic capacitance from a plurality of sense lines of the touch sensor panel is amplified with an amplifier to detect a touched position; and
a sensor size switching section that is provided between the plurality of sense lines and the touched position detecting section and switches an electrode size of the sense lines between the at least two electrode size of large and small, wherein the sensor size switching section has a size switching controlling section for controlling switching between the at least two electrode sizes of large and small in accordance with a size of a pointer in contact with or in the proximity of a surface of the touch sensor panel.
2. The touch panel system of claim 1 , wherein the size switching controlling section switches to a small electrode size for a pointer with a larger size in contact with or in the proximity of the surface of the touch sensor panel, and switches to a large electrode size for a pointer with a smaller size in contact with or in the proximity of the surface.
3. The touch panel system of claim 2 , wherein the size switching controlling section switches feedback capacity of the amplifier in response to the switching of the sensor size switching section.
4. An electronic equipment using the touch panel system of claim 1 on a display screen of a display device as a position inputting device.
5. The electronic equipment of claim 4 , wherein the display device is a liquid crystal display, plasma display, organic EL display or a field discharge display.