Mutual-capacitance touch apparatus and highly sensitive mutual-capacitance touch sensing method for the same

A highly sensitive mutual-capacitance touch sensing method comprising:

• (a) providing a touch display apparatus, the touch display apparatus comprising:
• a plurality of first touch electrodes arranged along a first direction;
• a plurality of second touch electrodes arranged along a second direction, wherein the first direction is different from the second direction;
• a transistor substrate;
• a thin film transistor layer comprising a plurality of thin film transistors, a plurality of data lines and a plurality of gate lines;
• a plurality of pixel electrodes electrically connected to the thin film transistors;
• a display material layer being arranged on a side of the plurality of pixel electrodes, the side being opposite to the transistor substrate;
• at least a common electrode;
• a display controller comprising a display power source;
• a touch controller comprising:
• a touch power source;
• a touch driving signal generator generating a touch driving signal;
• and
• a touch receiver and an amplifier with gain larger than zero;
• and
• (b) the touch controller sequentially or randomly applying the touch driving signal to a selected first touch electrode, and sensing a touch sensing signal at a second touch electrode by the touch receiver, and processing the touch sensing signal by the amplifier with gain larger than zero, then outputting the processed touch sensing signal to a reference point of the display controller or to the common electrode layer, wherein the display controller and the touch controller have no common current loop therebetween during touch sensing operation.

A mutual-capacitance touch display apparatus comprising:

• a plurality of first touch electrodes arranged along a first direction;
• a plurality of second touch electrodes arranged along a second direction, wherein the first direction is different from the second direction;
• a transistor substrate;
• a thin film transistor layer comprising a plurality of thin film transistors, a plurality of data lines and a plurality of gate lines;
• a plurality of pixel electrodes being electrically connected to the thin film transistor;
• a display material layer being arranged on a side of the plurality of pixel electrodes, the side being opposite to the transistor substrate;
• and
• a common electrode layer;
• a display controller comprising a display power source;
• a touch controller comprising:
• a touch power source;
• a touch driving signal generator generating a touch driving signal;
• and
• a touch receiver and an amplifier with gain larger than zero;
• wherein the touch controller sequentially or randomly applies the touch driving signal to a selected first touch electrode, and senses a touch sensing signal at a second touch electrode by the touch receiver, and processes the touch sensing signal by the amplifier with gain larger than zero, then outputs the processed touch sensing signal to a reference point of the display controller or to the common electrode.